HSS
Hollow
Structural
Sections
DIMENSIONS AND SECTION PROPERTIES
HSS:
TECHNICAL
BROCHURE
©2013 Steel Tube Institute
2516 Waukegan Road, Suite 172
Glenview, IL 60025
TEL: 847.461.1701
FAX: 847.660.7981
Technical Brochure: Dimensions & Section Properties
HSS Manufacturing
Methods
The transformation of steel strip into hollow structural sections (HSS)
is the result of a series of operations including forming, welding and
sizing. Currently three methods are being used in North America for
the manufacture of HSS. These methods are described below. Each
method meets ASTM A-500 and CSA G-40.21-92 requirements for the the
manufacture of HSS, and the sizes listed in this brochure may be produced
to either standard.
Electric Resistance Welding (ERW) Process
In the tube mill, flat steel strip (1) is formed
continuously around its longitudinal axis to
produce a round tube. This is done by moving
the strip through a progressive set of rolls (2-6).
The strip edges (7) are heated by either high
frequency induction or contact welding and
then forged together by weld rolls to create
a continuous longitudinal weld without the
addition of filler metal. The weld seam (8) is then
cooled and processed through a set of sizing
shaping rolls which cold-form it into a round (9),
square (10) or rectangular (11) section.
Form-Square Weld-Square (ERW) Process
In the tube mill, flat steel strip (1) is formed
continuously around its longitudinal axis to
produce a round tube. This is done by moving
the strip through a progressive set of rolls (2-6).
The strip edges (7) are heated by either high
frequency induction or contact welding and
then forged together by weld rolls to create
a continuous longitudinal weld without the
addition of filler metal. The weld seam (8) is then
cooled and processed through a set of sizing
shaping rolls which cold-form it into a round (9),
square (10) or rectangular (11) section.
Submerged Arc Weld (SAW) Process
In the tube mill, flat steel strip (1) is formed
continuously around its longitudinal axis to
produce a round tube. This is done by moving
the strip through a progressive set of rolls (2-6).
The strip edges (7) are heated by either high
frequency induction or contact welding and
then forged together by weld rolls to create
a continuous longitudinal weld without the
addition of filler metal. The weld seam (8) is then
cooled and processed through a set of sizing
shaping rolls which cold-form it into a round (9),
square (10) or rectangular (11) section.
HSS
Hollow
Structural
Sections
STEELTUBEINSTITUTE.ORG/HSS
Technical Brochure: Dimensions & Section Properties
TITLE IF NECESSARY
Foreword
Note: The information presented in this publication has been prepared
in accordance with recognized engineering principles and is for general
information only.While it is believed to be accurate, this information
should not be used or relied upon for any specific application without
competent professional examination and verification of its accuracy,
suitability, and applicability by a licensed professional engineer, designer,
or architect.The publication of the material contained herein is not
intended as a representation or warranty on the part of The Steel Tube
Institute of North America or of any other person named herein, that this
information is suitable for any general or particular use or of freedom
from infringement of any patent or patents.Anyone making use of this
information assumes all liability arising from such use.
Caution must be exercised when relying upon other specifications
and codes developed by other bodies and incorporated by reference
herein since such material may be modified or amended from time to
time subsequent to the printing of this edition.The Institute bears no
responsibility for such material other than to refer to it and incorporate it
by reference at the time of the initial publication of this edition.
This publication presents tables of dimensions and section properties for rectangular, square, and round Hollow Structural Sections (HSS). HSS with a maximum periphery of 64 inches are manufactured
by the electric-resistance welding (ERW) process. HSS with peripheries greater than 64 inches are manufactured by the submerged arc welding (SAW) process. See HSS Manufacturing Methods inside
front cover in this publication.
The dimensions, including nominal width, nominal depth, nominal diameter and nominal wall thickness are subject to the permissible variations stipulated in ASTM A500 “Standard Specification for
Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes”. With today’s manufacturing methods, HSS are produced with more precision than in the past.
The strip used to produce HSS is now ordered to thicknesses with tighter tolerances. As a result, ERW HSS manufactured to A500 will often have a wall thickness close to the Specification allowable
value. In a change from past practice, section property data is now based upon the design wall thickness.
The design wall thickness, t, for ERW HSS is less than the specified nominal wall thickness. For SAW HSS, the design wall thickness, t, is equal to the specified nominal wall thickness.The design wall
thickness for each HSS size is included in the tabulated data.
The section property data based upon the design wall thickness, t, results in variations in the published area data that do not exceed 3.50% of the data based upon the minimum permissible wall
thickness stipulated in ASTM A500. This is consistent with the similar section property data published for hot rolled structural shapes and the manufacturing tolerances associated with those products.
The section property data for rectangular and square ERW HSS are based upon outside corner radii equal to 2.0 times the design wall thickness. The section property data for rectangular and square
SAW HSS are based upon outside corner radii equal to 3.6 times the design wall thickness for SAW sections with 5/8 inch nominal wall thicknesses; and 3.0 times the design wall thickness for SAW
sections with nominal wall thicknesses equal to 1/2 inch and 3/8 inch.
General availability information for each size of HSS manufactured to ASTM A500 Grade B is contained in The Steel Tube Institute’s companion publication “Principal Producers and Capabilities”. Tables,
summarizing the capabilities of principal producers by specific size and wall thickness, are included for rectangular, square and round HSS.
NOTE: The more universal terms “Hollow Structural Section”and “HSS”are used in this publication to designate rectangular, square and round structural steel tubing. These terms replace “structural tubing”and “pipe”, which had
been used previously. The round Hollow Structural Sections include typical “pipe” size diameters and wall thicknesses, as well as typical HSS sizes.
HSS
Hollow
Structural
Sections
STEELTUBEINSTITUTE.ORG/HSS
Technical Brochure: Dimensions & Section Properties
Table of Contents
2
14
2 Dimensions and Sections Properties of Rectangle HSS
14 Dimensions and Sections Properties of Square HSS
18 Dimensions and Sections Properties of Round HSS
Nomenclature
HSS
Hollow
Structural
Sections
STEELTUBEINSTITUTE.ORG/HSS
b
Nominal width minus 3 times the design wall thickness, t (in.)
rx
Radius of gyration with respect to the X-X axis (in.)
C
Torsional shear constant of cross-section (in.3)
ry
Radius of gyration with respect to the Y-Y axis (in.)
D
Outside diameter of round HSS (in.)
S
Elastic section modulus (in.3)
h
Nominal depth minus 3 times the design wall thickness, t (in.)
Sx
Elastic section modulus about the X-X axis (in.3)
I
Moment of inertia of cross-section (in.4)
Sy
Elastic section modulus about the Y-Y axis (in.3)
Ix
Moment of inertia of cross-section about the X-X axis (in.4)
t
Iy
Moment of inertia of cross-section about the Y-Y axis (in.4)
Plastic section modulus (in.3)
J
Torsional stiffness constant of cross-section (in.4)
Z
Zx
r
Governing radius of gyration (in.)
Zy
Plastic section modulus about the Y-Y axis (in.3)
Design wall thickness (in.)... “units added”
Plastic section modulus about the X-X axis (in.3)
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
ly
Sy
ry
Zy
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
in. Y-Y Axis
X-X Axis
32 x 24 x 5/8*
1/2*
3/8*
225.80
183.50
138.95
0.625
0.500
0.375
35.4
45.0
61.0
48.2
61.0
82.3
66.4
53.9
40.8
9880
8160
6250
617
510
391
12.2
12.3
12.4
733
601
458
6390
5280
4050
533
440
337
9.81
9.89
9.96
604
495
378
12600
10100
7670
913
739
560
9.01
9.12
9.17
30 x 24 x 5/8*
1/2*
3/8*
217.30
176.70
133.84
0.625
0.500
0.375
35.4
45.0
61.0
45.0
57.0
77.0
63.9
51.9
39.3
8480
7010
5380
565
468
359
11.5
11.6
11.7
668
548
418
6050
5000
3840
504
417
320
9.73
9.82
9.88
575
472
360
11400
9220
6990
854
692
524
8.68
8.79
8.84
28 x 24 x 5/8*
1/2*
3/8*
208.79
169.89
128.74
0.625
0.500
0.375
35.4
45.0
61.0
41.8
53.0
71.7
61.4
49.9
37.8
7210
5970
4580
515
426
327
10.8
10.9
11.0
605
497
379
5710
4730
3630
476
394
302
9.65
9.73
9.79
546
448
342
10300
8330
6320
796
645
489
8.34
8.45
8.51
26 x 24 x 5/8*
1/2*
3/8*
200.28
163.08
123.64
0.625
0.500
0.375
35.4
45.0
61.0
38.6
49.0
66.3
58.9
47.9
36.3
6060
5020
3860
466
386
297
10.1
10.2
10.3
545
448
342
5370
4450
3420
447
371
285
9.55
9.64
9.70
517
425
324
9240
7460
5660
737
598
453
8.01
8.12
8.17
24 x 22 x 5/8*
1/2*
3/8*
183.27
149.47
113.43
0.625
0.500
0.375
35.4
45.0
61.0
35.4
45.0
61.0
53.9
43.9
33.3
4680
3900
3000
390
325
250
9.33
9.42
9.49
458
378
289
4110
3420
2630
373
311
239
8.73
8.82
8.89
432
356
273
7150
5780
4390
621
504
383
7.34
7.45
7.51
22 x 20 x 5/8*
1/2*
3/8*
166.25
135.86
103.22
0.625
0.500
0.375
35.4
45.0
61.0
32.2
41.0
55.7
48.9
39.9
30.3
3530
2950
2280
321
269
207
8.51
8.60
8.67
379
313
240
3060
2560
1970
306
256
197
7.91
8.00
8.07
355
294
225
5400
4370
3330
514
418
318
6.68
6.79
6.84
This size produced by the submerged arc weld (SAW) process
2
Torsional
Stiffness
Constant
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
in. in. 3
Weight
Wall
per Thickness
Foot
t
b/t
h/t
Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
Ib.
in. Y-Y Axis
X-X Axis
20 x 18 x 5/8*
1/2*
3/8*
149.24
122.25
93.01
0.625
0.500
0.375
25.8
33.0
45.0
29.0
37.0
50.3
43.9
35.9
27.3
2590
2180
1690
259
218
169
7.69
7.78
7.85
307
255
196
2210
1850
1440
245
206
160
7.10
7.19
7.25
286
238
183
3960
3220
2450
417
340
259
6.01
6.12
6.17
20 x 16 x 5/8*
1/2*
3/8*
140.73
115.45
87.91
0.625
0.500
0.375
22.6
29.0
39.7
29.0
37.0
50.3
41.4
33.9
25.8
2360
1990
1540
236
199
154
7.55
7.65
7.72
283
236
181
1680
1410
1100
210
177
137
6.37
6.46
6.52
243
203
156
3280
2670
2040
368
301
229
5.68
5.79
5.84
20 x 12 x 5/8
1/2
3/8
5/16
127.37
103.30
78.52
65.87
0.581
0.465
0.349
0.291
17.7
22.8
31.4
38.2
31.4
40.0
54.3
65.7
35.0
28.3
21.5
18.1
1880
1550
1200
1010
188
155
120
101
7.33
7.39
7.45
7.48
230
188
144
122
851
705
547
464
142
117
91.1
77.3
4.93
4.99
5.04
5.07
162
132
102
85.8
1890
1540
1180
997
257
209
160
134
5.17
5.20
5.23
5.25
20 x 8
x 5/8
1/2
3/8
5/16
110.36
89.68
68.31
57.36
0.581
0.465
0.349
0.291
10.8
14.2
19.9
24.5
31.4
40.0
54.3
65.7
30.3
24.6
18.7
15.7
1440
1190
926
786
144
119
92.6
78.6
6.89
6.96
7.03
7.07
185
152
117
98.6
338
283
222
189
84.6
70.8
55.6
47.4
3.34
3.39
3.44
3.47
96.4
79.5
61.5
52.0
916
757
586
496
167
137
105
88.3
4.50
4.53
4.57
4.58
20 x 4
x 1/2
3/8
5/16
1/4
76.07
58.10
48.86
39.43
0.465
0.349
0.291
0.233
5.6
8.46
10.7
14.2
40.0
54.3
65.7
82.8
20.9
16.0
13.4
10.8
838
657
560
458
83.8
65.7
56.0
45.8
6.33
6.42
6.46
6.50
115
89.3
75.6
61.5
58.7
47.6
41.2
34.3
29.3
23.8
20.6
17.1
1.68
1.73
1.75
1.78
34.0
26.8
22.9
18.7
195
156
134
111
63.8
49.9
42.4
34.7
3.87
3.90
3.92
3.93
18 x 12 x 5/8*
1/2*
3/8*
115.21
95.03
72.59
0.625
0.500
0.375
16.2
21.0
29.0
25.8
33.0
45.0
33.9
27.9
21.3
1450
1240
971
161
138
108
6.55
6.67
6.75
199
168
130
783
668
524
131
111
87.3
4.81
4.89
4.95
152
127
98.6
1740
1430
1100
243
200
153
4.68
4.79
4.84
18 x 6
93.34
76.07
58.10
48.86
39.43
0.581
0.465
0.349
0.291
0.233
7.3
9.9
14.2
17.6
22.8
28.0
35.7
48.6
58.9
74.3
25.7
20.9
16.0
13.4
10.8
923
770
602
513
419
103
85.6
66.9
57.0
46.5
6.00
6.07
6.15
6.18
6.22
135
112
86.4
73.1
59.4
158
134
106
91.3
75.1
52.7
44.6
35.5
30.4
25.0
2.48
2.53
2.58
2.61
2.63
61.0
50.7
39.5
33.5
27.3
462
387
302
257
210
109
89.9
69.5
58.7
47.7
3.83
3.87
3.90
3.92
3.93
x 5/8
1/2
3/8
5/16
1/4
This size produced by the submerged arc weld (SAW) process
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Nominal Size
in.
in. in. b/t
h/t
Torsional
Stiffness
Constant
Torsional
Shear
Constant
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
4.50
4.53
4.57
4.58
3.83
3.87
3.90
3.92
3.93
3.17
3.20
3.23
3.25
3.27
3.28
4.12
4.17
3.83
3.87
3.90
3.92
3.93
3.17
3.20
3.23
3.25
3.27
3.28
2.83
2.87
2.90
2.92
2.93
2.95
Ib.
in. Y-Y Axis
X-X Axis
110.36
89.68
68.31
57.36
0.581
0.465
0.349
0.291
17.7
22.8
31.4
38.2
24.5
31.4
42.8
52.0
30.3
24.6
18.7
15.7
1090
904
702
595
136
113
87.7
74.4
6.00
6.06
6.12
6.15
165
135
104
87.7
700
581
452
384
117
96.8
75.3
64
4.80
4.86
4.91
4.94
135
111
85.5
72.2
1370
1120
862
727
204
166
127
107
16 x 8
x 5/8
1/2
3/8
5/16
93.34
76.07
58.10
48.86
39.43
0.581
0.465
0.349
0.291
0.233
10.8
14.2
19.9
24.5
31.3
24.5
31.4
42.8
52.0
65.7
25.7
20.9
16.0
13.4
10.8
815
679
531
451
368
102
84.9
66.3
56.4
46.1
5.64
5.70
5.77
5.8
5.83
129
106
82.1
69.4
56.4
274
230
181
155
127
68.5
57.6
45.3
38.7
31.7
3.27
3.32
3.37
3.4
3.42
79.2
65.5
50.8
43.0
35.0
681
563
436
369
300
132
108
83.4
70.4
57.0
16 x 4
x 5/8
1/2
3/8
5/16
1/4
3/16
76.33
62.46
47.90
40.35
32.63
24.73
0.581
0.465
0.349
0.291
0.233
0.174
3.88
5.6
8.46
10.7
14.2
20.0
24.5
31.4
42.8
52.0
65.7
89.0
21.0
17.2
13.2
11.1
8.96
6.76
539
455
360
308
253
193
67.3
56.9
45.0
38.5
31.6
24.2
5.06
5.15
5.23
5.27
5.31
5.35
92.9
77.3
60.2
51.1
41.7
31.7
54.1
47
38.3
33.2
27.7
21.5
27.0
23.5
19.1
16.6
13.8
10.8
1.60
1.65
1.71
1.73
1.76
1.78
32.5
27.4
21.7
18.5
15.2
11.7
174
150
120
103
85.2
65.5
60.5
50.7
39.7
33.8
27.6
21.1
81.42
62.39
0.500
0.375
21.0
29.0
25.0
34.3
23.9
18.3
678
534
96.9
76.3
5.32
5.40
116
90.0
536
422
89.3
70.4
4.73
4.8
104
81.2
990
762
154
118
93.34
76.07
58.10
48.86
39.43
0.581
0.465
0.349
0.291
0.233
14.2
18.5
25.7
31.4
39.9
21.1
27.1
37.1
45.1
57.1
25.7
20.9
16.0
13.4
10.8
687
573
447
380
310
98.2
81.8
63.9
54.3
44.3
5.17
5.23
5.29
5.32
5.35
120
98.8
76.3
64.6
52.4
407
341
267
227
186
81.5
68.1
53.4
45.5
37.2
3.98
4.04
4.09
4.12
4.14
95.1
78.5
60.7
51.4
41.8
832
685
528
446
362
146
120
91.8
77.4
62.6
76.33
62.46
47.90
40.35
32.63
24.73
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
21.1
27.1
37.1
45.1
57.1
77.5
21.0
17.2
13.2
11.1
8.96
6.76
478
402
317
271
222
170
68.3
57.4
45.3
38.7
31.7
24.3
4.77
4.84
4.91
4.94
4.98
5.01
88.7
73.6
57.3
48.6
39.6
30.1
124
105
84.1
72.3
59.6
45.9
41.2
35.1
28
24.1
19.9
15.3
2.43
2.48
2.53
2.55
2.58
2.61
48.4
40.4
31.6
26.9
22.0
16.7
334
279
219
186
152
116
83.7
69.3
53.7
45.5
36.9
28.0
67.82
55.66
42.79
36.10
29.23
22.18
0.581
0.465
0.349
0.291
0.233
0.174
3.88
5.60
8.46
10.7
14.2
20.0
21.1
27.1
37.1
45.1
57.1
77.5
18.7
15.3
11.8
9.92
8.03
6.06
373
317
252
216
178
137
53.3
45.3
36.0
30.9
25.4
19.5
4.47
4.55
4.63
4.67
4.71
4.74
73.1
61.0
47.8
40.6
33.2
25.3
47.2
41.2
33.6
29.2
24.4
19
23.6
20.6
16.8
14.6
12.2
9.48
1.59
1.64
1.69
1.72
1.74
1.77
28.5
24.1
19.1
16.4
13.5
10.3
148
127
102
87.7
72.4
55.8
52.6
44.1
34.6
29.5
24.1
18.4
14 x 10 x 5/8
1/2
3/8
5/16
1/4
14 x 6
14 x 4
x 5/8
1/2
3/8
5/16
1/4
3/16
x 5/8
1/2
3/8
5/16
1/4
3/16
Surface
Area
Per Foot
Cross
Sectional
Area
16 x 12 x 5/8
1/2
3/8
5/16
14 x 12 x 1/2*
3/8*
4
Weight
Wall
per Thickness
Foot
t
This size produced by the submerged arc weld (SAW) process
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Nominal Size
in.
in. in. 5
Weight
Wall
per Thickness
Foot
t
b/t
h/t
Ib.
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Zx
J
C
in.
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
in.2
in.4
in.3
in.
in.3
in.4
in.3
Y-Y Axis
X-X Axis
Surface
Area
Per Foot
12 x 10 x 1/2
3/8
5/16
1/4
69.27
53.00
44.60
36.03
0.465
0.349
0.291
0.233
18.5
25.7
31.4
39.9
22.8
31.4
38.2
48.5
19.0
14.6
12.2
9.90
395
310
264
216
65.9
51.6
44.0
36.0
4.56
4.61
4.64
4.67
78.8
61.1
51.7
42.1
298
234
200
164
59.7
46.9
40.0
32.7
3.96
4.01
4.04
4.07
69.6
54.0
45.7
37.2
545
421
356
289
102
78.3
66.1
53.5
3.53
3.57
3.58
3.60
12 x 8
x 5/8
1/2
3/8
5/16
1/4
3/16
76.33
62.46
47.90
40.35
32.63
24.73
0.581
0.465
0.349
0.291
0.233
0.174
10.8
14.2
19.9
24.5
31.3
43.0
17.7
22.8
31.4
38.2
48.5
66.0
21.0
17.2
13.2
11.1
8.96
6.76
397
333
262
224
184
140
66.1
55.6
43.7
37.4
30.6
23.4
4.34
4.41
4.47
4.50
4.53
4.56
82.1
68.1
53.0
44.9
36.6
27.8
210
178
140
120
98.8
75.7
52.5
44.4
35.1
30.1
24.7
18.9
3.16
3.21
3.27
3.29
3.32
3.35
61.9
51.5
40.1
34.1
27.8
21.1
454
377
293
248
202
153
97.7
80.4
62.1
52.4
42.5
32.2
3.17
3.20
3.23
3.25
3.27
3.28
12 x 6
x 5/8
1/2
3/8
5/16
1/4
3/16
67.82
55.66
42.79
36.10
29.23
22.18
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
17.7
22.8
31.4
38.2
48.5
66.0
18.7
15.3
11.8
9.92
8.03
6.06
321
271
215
184
151
116
53.4
45.2
35.9
30.7
25.2
19.4
4.14
4.21
4.28
4.31
4.34
4.38
68.8
57.4
44.8
38.1
31.1
23.7
106
91.1
72.9
62.8
51.9
40.0
35.5
30.4
24.3
20.9
17.3
13.3
2.39
2.44
2.49
2.52
2.54
2.57
42.1
35.2
27.7
23.6
19.3
14.7
271
227
178
152
124
94.6
71.1
59.0
45.8
38.8
31.6
24.0
2.83
2.87
2.90
2.92
2.93
2.95
12 x 4
x 5/8
1/2
3/8
5/16
1/4
3/16
59.32
48.85
37.69
31.84
25.82
19.63
0.581
0.465
0.349
0.291
0.233
0.174
3.88
5.60
8.46
10.7
14.2
20.0
17.7
22.8
31.4
38.2
48.5
66.0
16.4
13.5
10.4
8.76
7.10
5.37
245
210
168
144
119
91.8
40.8
34.9
28.0
24.1
19.9
15.3
3.87
3.95
4.02
4.06
4.10
4.13
55.5
46.7
36.7
31.3
25.6
19.6
40.4
35.3
28.9
25.2
21.0
16.4
20.2
17.7
14.5
12.6
10.5
8.20
1.57
1.62
1.67
1.70
1.72
1.75
24.5
20.9
16.6
14.2
11.7
9.00
122
105
84.1
72.4
59.8
46.1
44.6
37.5
29.5
25.2
20.6
15.7
2.50
2.53
2.57
2.58
2.60
2.62
12 x 3 1/2 x 3/8
5/16
36.41
30.78
0.349
0.291
7.03
9.03
31.4
38.2
10.0
8.46
156
134
26.0
22.4
3.94
3.98
34.7
29.6
21.3
18.6
12.2
10.6
1.46
1.48
14.0
12.1
64.7
56.0
25.5
21.8
2.48
2.50
12 x 3
x 5/16
1/4
3/16
29.72
24.12
18.35
0.291
0.233
0.174
7.31
9.88
14.2
38.2
48.5
66.0
8.17
6.63
5.02
124
103
79.6
20.7
17.2
13.3
3.90
3.94
3.98
27.9
22.9
17.5
13.1
11.1
8.72
8.73
7.38
5.81
1.27
1.29
1.32
10.0
8.28
6.40
41.3
34.5
26.8
18.4
15.1
11.6
2.42
2.43
2.45
12 x 2
x 5/16
1/4
3/16
27.59
22.42
17.08
0.291
0.233
0.174
3.87
5.6
8.5
38.2
48.5
66.0
7.59
6.17
4.67
104
86.9
67.4
17.4
14.5
11.2
3.71
3.75
3.80
24.5
20.1
15.5
5.10
4.40
3.55
5.10
4.40
3.55
0.820 6.05
0.845 5.08
0.872 3.97
17.6
15.1
12.0
11.6
9.64
7.49
2.25
2.27
2.28
Nominal Size
x 8 x 5/8
10
1/2
3/8
5/16
1/4
3/16
6
Weight
Wall
per Thickness
Foot
t
b/t
h/t
0.581
67.82
10.8
0.465
14.2
55.66
0.349
42.79
19.9
0.291
24.5
36.10
0.233
31.3
29.23
0.174
22.18
43.0
14.2
18.5
25.7
31.4
39.9
54.5
Cross
Sectional
Area
Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
lx
X-X Axis
Sx
rx
Zx
lx
Y-Y Axis
Sx
rx
Zx
J
C
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
15.3
11.8
9.92
8.03
6.06
253
214
169
145
119
91.4
50.5
42.7
33.9
29.0
23.8
18.3
3.68
3.73
3.79
3.82
3.85
3.88
62.2
51.9
40.5
34.4
28.1
21.4
178
151
120
103
84.7
65.1
44.5
37.8
30.0
25.7
21.2
16.3
3.09
3.14
3.19
3.22
3.25
3.28
53.3
44.5
34.8
29.6
24.2
18.4
346
288
224
190
155
118
80.4
66.4
51.4
43.5
35.3
26.7
2.83
2.87
2.90
2.92
2.93
2.95
18.7
10 x 6
x 5/8
1/2
3/8
5/16
1/4
3/16
59.32
48.85
37.69
31.84
25.82
19.63
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
14.2
18.5
25.7
31.4
39.9
54.5
16.4
13.5
10.4
8.76
7.10
5.37
201
171
137
118
96.9
74.6
40.2
34.3
27.3
23.5
19.4
14.9
3.50
3.57
3.63
3.66
3.69
3.73
51.3
43.0
33.8
28.8
23.6
18.0
89.4
76.8
61.8
53.3
44.1
34.1
29.8
25.6
20.6
17.8
14.7
11.4
2.34
2.39
2.44
2.47
2.49
2.52
35.8
30.1
23.7
20.2
16.6
12.7
209
176
139
118
96.7
73.8
58.6
48.7
37.9
32.2
26.2
19.9
2.50
2.53
2.57
2.58
2.60
2.62
10 x 5
x 3/8
5/16
1/4
3/16
35.13
29.72
24.12
18.35
0.349
0.291
0.233
0.174
11.3
14.2
18.5
25.7
25.7
31.4
39.9
54.5
9.67
8.17
6.63
5.02
120
104
85.8
66.2
24.1
20.8
17.2
13.2
3.53
3.56
3.60
3.63
30.4
26.0
21.3
16.3
40.6
35.2
29.3
22.7
16.2
14.1
11.7
9.09
2.05
2.07
2.10
2.13
18.7
16.0
13.2
10.1
100
86.0
70.7
54.1
31.2
26.5
21.6
16.5
2.40
2.42
2.43
2.45
10 x 4
x 5/8
1/2
3/8
5/16
1/4
3/16
1/8
50.81
42.05
32.58
27.59
22.42
17.08
11.56
0.581
0.465
0.349
0.291
0.233
0.174
0.116
3.88
5.60
8.46
10.7
14.2
20.0
31.5
14.2
18.5
25.7
31.4
39.9
54.5
83.2
14.0
11.6
8.97
7.59
6.17
4.67
3.16
149
129
104
90.1
74.7
57.8
39.8
29.9
25.8
20.8
18.0
14.9
11.6
7.97
3.26
3.34
3.41
3.44
3.48
3.52
3.55
40.3
34.1
27.0
23.1
19.0
14.6
10.0
33.5
29.5
24.3
21.2
17.7
13.9
9.65
16.8
14.7
12.1
10.6
8.87
6.93
4.83
1.54
1.59
1.64
1.67
1.70
1.72
1.75
20.6
17.6
14.0
12.1
10.0
7.66
5.26
95.7
82.6
66.5
57.3
47.4
36.5
25.1
36.7
31.0
24.4
20.9
17.1
13.1
8.90
2.17
2.20
2.23
2.25
2.27
2.28
2.30
10 x 3 1/2 x 1/2
3/8
5/16
1/4
3/16
1/8
40.34
31.31
26.53
21.57
16.44
11.13
0.465
0.349
0.291
0.233
0.174
0.116
4.53
7.03
9.03
12.0
17.1
27.2
18.5
25.7
31.4
39.9
54.5
83.2
11.1
8.62
7.30
5.93
4.50
3.04
118
96.1
83.2
69.1
53.6
37.0
23.7
19.2
16.6
13.8
10.7
7.40
3.26
3.34
3.38
3.41
3.45
3.49
31.9
25.3
21.7
17.9
13.7
9.37
21.4
17.8
15.6
13.1
10.3
7.22
12.2
10.2
8.92
7.51
5.89
4.12
1.39
1.44
1.46
1.49
1.51
1.54
14.7
11.8
10.2
8.45
6.52
4.48
63.2
51.5
44.6
37.0
28.6
19.8
26.5
21.1
18.0
14.8
11.4
7.75
2.12
2.15
2.17
2.18
2.20
2.22
10 x 3
x 3/8
5/16
1/4
3/16
1/8
30.03
25.46
20.72
15.80
10.71
0.349
0.291
0.233
0.174
0.116
5.6
7.3
9.8
14.2
22.9
25.7
31.4
39.9
54.5
83.2
8.27
7.01
5.70
4.32
2.93
88.0
76.3
63.6
49.4
34.2
17.6
15.3
12.7
9.87
6.83
3.26
3.30
3.34
3.38
3.42
23.7
20.3
16.7
12.8
8.80
12.4
11.0
9.28
7.33
5.16
8.28
7.30
6.19
4.89
3.44
1.22
1.25
1.28
1.30
1.33
9.73
8.42
6.99
5.41
3.74
37.8
33.0
27.6
21.5
14.9
17.7
15.2
12.5
9.64
6.61
2.07
2.08
2.10
2.12
2.13
10 x 2
x 3/8
5/16
1/4
3/16
1/8
27.48
23.34
19.02
14.53
9.86
0.349
0.291
0.233
0.174
0.116
2.73
3.87
5.58
8.49
14.2
25.7
31.4
39.9
54.5
83.2
7.58
6.43
5.24
3.98
2.70
71.7
62.6
52.5
41.0
28.5
14.3
12.5
10.5
8.19
5.70
3.08
3.12
3.17
3.21
3.25
20.3
17.5
14.4
11.1
7.65
4.70
4.24
3.67
2.97
2.14
4.70
4.24
3.67
2.97
2.14
0.787
0.812
0.838
0.864
0.890
5.76
5.06
4.26
3.34
2.33
15.9
14.2
12.2
9.74
6.90
11.0
9.56
7.99
6.22
4.31
1.90
1.92
1.93
1.95
1.97
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
7
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
Y-Y Axis
X-X Axis
Surface
Area
Per Foot
ft.2
9
x 7
x 5/8
1/2
3/8
5/16
1/4
3/16
59.32
48.85
37.69
31.84
25.82
19.63
0.581
0.465
0.349
0.291
0.233
0.174
9.0
12.1
17.1
21.1
27.0
37.2
12.5
16.4
22.8
27.9
35.6
48.7
16.4
13.5
10.4
8.76
7.10
5.37
174
149
119
102
84.1
64.7
38.7
33.0
26.4
22.6
18.7
14.4
3.26
3.32
3.38
3.41
3.44
3.47
48.3
40.5
31.8
27.1
22.2
16.9
117
100
80.4
69.2
57.2
44.1
33.5
28.7
23.0
19.8
16.3
12.6
2.68
2.73
2.78
2.81
2.84
2.87
40.5
34.0
26.7
22.8
18.7
14.3
235
197
154
131
107
81.7
62.0
51.5
40.0
33.9
27.6
20.09
2.50
2.53
2.57
2.58
2.60
2.62
9
x 5
x 5/8
1/2
3/8
5/16
1/4
3/16
50.81
42.05
32.58
27.59
22.42
17.08
0.581
0.465
0.349
0.291
0.233
0.174
5.61
7.75
11.3
14.2
18.5
25.7
12.5
16.4
22.8
27.9
35.6
48.7
14.0
11.6
8.97
7.59
6.17
4.67
133
115
92.5
79.8
66.1
51.1
29.6
25.5
20.5
17.7
14.7
11.4
3.08
3.14
3.21
3.24
3.27
3.31
38.5
32.5
25.7
22.0
18.1
13.8
52
45.2
36.8
32.0
26.6
20.7
20.8
18.1
14.7
12.8
10.6
8.28
1.92
1.97
2.03
2.05
2.08
2.10
25.3
21.5
17.1
14.6
12.0
9.25
128
109
86.9
74.4
61.2
46.9
42.5
35.6
27.9
23.8
19.4
14.8
2.17
2.20
2.23
2.25
2.27
2.28
9
x 3
x 1/2
3/8
5/16
1/4
3/16
35.24
27.48
23.34
19.02
14.53
0.465
0.349
0.291
0.233
0.174
3.45
5.60
7.31
9.88
14.2
16.4
22.8
27.9
35.6
48.7
9.74
7.58
6.43
5.24
3.98
80.8
66.3
57.7
48.2
37.6
18.0
14.7
12.8
10.7
8.35
2.88
2.96
3.00
3.04
3.07
24.6
19.7
16.9
14.0
10.8
13.2
11.2
9.88
8.38
6.64
8.81
7.45
6.59
5.59
4.42
1.17
1.21
1.24
1.27
1.29
10.8
8.80
7.63
6.35
4.92
40.0
33.1
28.9
24.2
18.9
19.7
15.8
13.6
11.3
8.66
1.87
1.90
1.92
1.93
1.95
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
8
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
Y-Y Axis
X-X Axis
8
x 6
x 5/8
1/2
3/8
5/16
1/4
3/16
50.81
42.05
32.58
27.59
22.42
17.08
0.581
0.465
0.349
0.291
0.233
0.174
7.3
9.9
14.2
17.6
22.8
31.5
7.3
9.9
14.2
17.6
22.8
31.5
14.0
11.6
8.97
7.59
6.17
4.67
114
98.2
79.1
68.3
56.6
43.7
28.5
24.6
19.8
17.1
14.2
10.9
2.85
2.91
2.97
3.00
3.03
3.06
36.1
30.5
24.1
20.6
16.9
13.0
72.3
62.5
50.6
43.8
36.4
28.2
24.1
20.8
16.9
14.6
12.1
9.39
2.27
2.32
2.38
2.40
2.43
2.46
29.5
24.9
19.8
16.9
13.9
10.7
150
127
100
85.8
70.3
53.7
46.0
38.4
30.0
25.5
20.8
15.8
2.17
2.20
2.23
2.25
2.27
2.28
8
x 4
x 5/8
1/2
3/8
5/16
x 1/4
3/16
1/8
42.30
35.24
27.48
23.34
19.02
14.53
9.86
0.581
0.465
0.349
0.291
0.233
0.174
0.116
3.8
5.6
8.46
10.7
14.2
20.0
31.5
3.8
5.6
8.46
10.7
14.2
20.0
31.5
11.7
9.74
7.58
6.43
5.24
3.98
2.70
82.0
71.8
58.7
51.0
42.5
33.1
22.9
20.5
17.9
14.7
12.8
10.6
8.27
5.73
2.64
2.71
2.78
2.82
2.85
2.88
2.92
27.4
23.5
18.8
16.1
13.3
10.2
7.02
26.6
23.6
19.6
17.2
14.4
11.3
7.90
13.3
11.8
9.80
8.58
7.21
5.65
3.95
1.51
1.56
1.61
1.63
1.66
1.69
1.71
16.6
14.3
11.5
9.91
8.20
6.33
4.36
70.3
61.1
49.3
42.6
35.3
27.2
18.7
28.7
24.4
19.3
16.5
13.6
10.4
7.10
1.83
1.87
1.90
1.92
1.93
1.95
1.97
8
x 3
x 1/2
3/8
5/16
1/4
3/16
1/8
31.84
24.93
21.21
17.32
13.25
9.01
0.465
0.349
0.291
0.233
0.174
0.116
3.45
5.60
7.31
9.88
14.2
22.9
3.45
5.60
7.31
9.88
14.2
22.9
8.81
6.88
5.85
4.77
3.63
2.46
58.5
48.5
42.4
35.5
27.8
19.3
14.6
12.1
10.6
8.88
6.94
4.83
2.58
2.65
2.69
2.73
2.77
2.80
20.0
16.1
13.9
11.5
8,87
6.11
11.7
10.0
8.81
7.49
5.94
4.20
7.81
6.63
5.87
4.99
3.96
2.80
1.15
1.20
1.23
1.25
1.28
1.31
9.64
7.88
6.84
5.70
4.43
3.07
34.3
28.5
24.9
20.8
16.2
11.3
17.4
14.0
12.1
10.0
7.68
5.27
1.70
1.73
1.75
1.77
1.78
1.80
8
x 2
x 3/8
5/16
1/4
3/16
1/8
22.37
19.08
15.62
11.97
8.16
0.349
0.291
0.233
0.174
0.116
2.73
3.87
5.58
8.49
14.2
2.73
3.87
5.58
8.49
14.2
6.18
5.26
4.30
3.28
2.23
38.2
33.7
28.5
22.4
15.7
9.56
8.43
7.12
5.61
3.93
2.49
2.53
2.57
2.61
2.65
13.4
11.6
9.68
7.51
5.19
3.73
3.38
2.94
2.39
1.72
3.73
3.38
2.94
2.39
1.72
0.777
0.802
0.827
0.853
0.879
4.61
4.06
3.43
2.70
1.90
12.1
10.9
9.36
7.48
5.30
8.65
7.57
6.35
4.95
3.44
1.57
1.58
1.60
1.62
1.63
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
9
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
Y-Y Axis
X-X Axis
7
x 5
x 1/2
3/8
5/16
1/4
3/16
1/8
35.24
27.48
23.34
19.02
14.53
9.86
0.465
0.349
0.291
0.233
0.174
0.116
7.75
11.3
14.2
18.5
25.7
40.1
12.1
17.1
21.1
27.0
37.2
57.3
9.74
7.58
6.43
5.24
3.98
2.70
60.6
49.5
43.0
35.9
27.9
19.3
17.3
14.1
12.3
10.2
7.96
5.52
2.50
2.56
2.59
2.62
2.65
2.68
21.9
17.5
15.0
12.4
9.52
6.53
35.6
29.3
25.5
21.3
16.6
11.6
14.2
11.7
10.2
8.53
6.65
4.63
1.91
1.97
1.99
2.02
2.05
2.07
17.3
13.8
11.9
9.83
7.57
5.20
27.2
21.4
18.3
15.0
11.4
7.79
27.2
21.4
18.3
15.0
11.4
7.79
1.87
1.90
1.92
1.93
1.95
1.97
7
x 4
x 1/2
3/8
5/16
1/4
3/16
1/8
31.84
24.93
21.21
17.32
13.25
9.01
0.465
0.349
0.291
0.233
0.174
0.116
5.60
8.46
10.7
14.2
20.0
31.5
12.1
17.1
21.1
27.0
37.2
57.3
8.81
6.88
5.85
4.77
3.63
2.46
50.7
41.8
36.5
30.5
23.8
16.6
14.5
11.9
10.4
8.72
6.81
4.73
2.40
2.46
2.50
2.53
2.56
2.59
18.8
15.1
13.1
10.8
8.33
5.73
20.7
17.3
15.2
12.8
10.0
7.03
10.4
8.63
7.58
6.38
5.02
3.51
1.53
1.58
1.61
1.64
1.66
1.69
12.6
10.2
8.83
7.33
5.67
3.91
21.1
16.8
14.4
11.8
9.07
6.20
21.1
16.8
14.4
11.8
9.07
6.20
1.70
1.73
1.75
1.77
1.78
1.80
7
x 3
x 1/2
3/8
5/16
1/4
3/16
1/8
28.43
22.37
19.08
15.62
11.97
8.16
0.465
0.349
0.291
0.233
0.174
0.116
3.45
5.60
7.31
9.88
14.2
22.9
12.1
17.1
21.1
27.0
37.2
57.3
7.88
6.18
5.26
4.30
3.28
2.23
40.7
34.1
29.9
25.2
19.8
13.8
11.6
9.73
8.54
7.19
5.65
3.95
2.27
2.35
2.38
2.42
2.45
2.49
15.8
12.8
11.1
9.22
7.14
4.93
10.2
8.71
7.74
6.60
5.24
3.71
6.80
5.81
5.16
4.40
3.50
2.48
1.14
1.19
1.21
1.24
1.26
1.29
8.46
6.95
6.05
5.06
3.94
2.73
15.0
12.1
10.5
8.68
6.69
4.60
15.0
12.1
10.5
8.68
6.69
4.60
1.53
1.57
1.58
1.60
1.62
1.63
7
x 2
x 1/4
3/16
1/8
13.91
10.7
7.31
0.233
0.174
0.116
5.58
8.49
14.2
27.0
37.2
57.3
3.84
2.93
2.00
19.8
15.7
11.1
5.67
4.49
3.16
2.27
2.31
2.35
7.64
5.95
4.13
2.58
2.10
1.52
2.58
2.10
1.52
0.819 3.02
0.845 2.39
0.871 1.68
5.52
4.32
3.00
5.52
4.32
3.00
1.43
1.45
1.47
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
10
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
Y-Y Axis
X-X Axis
6
x 5
x 1/2
3/8
5/16
1/4
3/16
1/8
31.84
24.93
21.21
17.32
13.25
9.01
0.465
0.349
0.291
0.233
0.174
0.116
7.75
11.3
14.2
18.5
25.7
40.1
9.90
14.2
17.6
22.8
31.5
48.7
8.81
6.88
5.85
4.77
3.63
2.46
41.1
33.9
29.6
24.7
19.3
13.4
13.7
11.3
9.85
8.25
6.44
4.48
2.16
2.22
2.25
2.28
2.31
2.34
17.2
13.8
11.9
9.87
7.62
5.24
30.8
25.5
22.3
18.7
14.6
10.2
12.3
10.2
8.91
7.47
5.84
4.07
1.87
1.92
1.95
1.98
2.01
2.03
15.2
12.2
10.5
8.72
6.73
4.63
59.8
48.1
41.4
34.2
26.3
18.0
23.0
18.2
15.6
12.8
9.76
6.66
1.70
1.73
1.75
1.77
1.78
1.80
6
x 4
x 1/2
3/8
5/16
1/4
3/16
1/8
28.43
22.37
19.08
15.62
11.97
8.16
0.465
0.349
0.291
0.233
0.174
0.116
5.6
8.4
10.7
14.2
20.0
31.5
9.9
14.2
17.6
22.8
31.5
48.7
7.88
6.18
5.26
4.30
3.28
2.23
34.0
28.3
24.8
20.9
16.4
11.4
11.3
9.43
8.27
6.96
5.46
3.81
2.08
2.14
2.17
2.20
2.23
2.26
14.6
11.9
10.3
8.53
6.60
4.56
17.8
14.9
13.2
11.1
8.76
6.15
8.89
7.47
6.58
5.56
4.38
3.08
1.50
1.55
1.58
1.61
1.63
1.66
11.0
8.94
7.75
6.45
5.00
3.46
40.3
32.8
28.4
23.6
18.2
12.6
17.8
14.2
12.2
10.1
7.74
5.30
1.53
1.57
1.58
1.60
1.62
1.63
6
x 3
x 1/2
3/8
5/16
1/4
3/16
1/8
25.03
19.82
16.96
13.91
10.70
7.31
0.465
0.349
0.291
0.233
0.174
0.116
3.45
5.60
7.31
9.88
14.2
22.9
9.9
14.2
17.6
22.8
31.5
48.7
6.95
5.48
4.68
3.84
2.93
2.00
26.8
22.7
20.1
17.0
13.4
9.43
8.95
7.57
6.69
5.66
4.47
3.14
1.97
2.04
2.07
2.10
2.14
2.17
12.1
9.90
8.61
7.19
5.59
3.87
8.69
7.48
6.67
5.70
4.55
3.23
5.79
4.99
4.45
3.80
3.03
2.15
1.12
1.17
1.19
1.22
1.25
1.27
7.28
6.03
5.27
4.41
3.45
2.40
23.1
19.3
16.9
14.2
11.1
7.73
12.7
10.3
8.91
7.39
5.71
3.93
1.37
1.40
1.42
1.43
1.45
1.47
6
x 2
x 3/8
5/16
1/4
3/16
1/8
17.27
14.83
12.21
9.42
6.46
0.349
0.291
0.233
0.174
0.116
2.73
3.87
5.58
8.49
14.2
14.2
17.6
22.8
31.5
48.7
4.78
4.10
3.37
2.58
1.77
17.1
15.3
13.1
10.5
7.42
5.71
5.11
4.37
3.49
2.47
1.89
1.93
1.97
2.01
2.05
7.93
6.95
5.84
4.58
3.19
2.77
2.52
2.21
1.80
1.31
2.77
2.52
2.21
1.80
1.31
0.760
0.785
0.810
0.836
0.861
3.46
3.07
2.61
2.07
1.46
8.42
7.60
6.55
5.24
3.72
6.35
5.58
4.70
3.68
2.57
1.23
1.25
1.27
1.28
1.30
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
11
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
Y-Y Axis
X-X Axis
5
x 4
x 1/2
3/8
5/16
1/4
3/16
1/8
25.03
19.82
16.96
13.91
10.70
7.31
0.465
0.349
0.291
0.233
0.174
0.116
5.60
8.46
10.7
14.2
20.0
31.5
7.75
11.3
14.2
18.5
25.7
40.1
6.95
5.48
4.68
3.84
2.93
2.00
21.2
17.9
15.8
13.4
10.6
7.42
8.49
7.17
6.32
5.35
4.22
2.97
1.75
1.81
1.84
1.87
1.90
1.93
10.9
8.96
7.79
6.49
5.05
3.50
14.9
12.6
11.1
9.46
7.48
5.27
7.43
6.30
5.57
4.73
3.74
2.64
1.46
1.52
1.54
1.57
1.60
1.62
9.35
7.67
6.67
5.57
4.34
3.01
30.3
24.9
21.7
18.0
14.0
9.66
14.5
11.7
10.1
8.32
6.41
4.39
1.37
1.40
1.42
1.43
1.45
1.47
5
x 3
x 1/2
3/8
5/16
1/4
3/16
1/8
21.63
17.27
14.83
12.21
9.42
6.46
0.465
0.349
0.291
0.233
0.174
0.116
3.45
5.60
7.31
9.88
14.2
22.9
7.75
11.3
14.2
18.5
25.7
40.1
6.02
4.78
4.10
3.37
2.58
1.77
16.4
14.1
12.6
10.7
8.53
6.03
6.57
5.65
5.03
4.29
3.41
2.41
1.65
1.72
1.75
1.78
1.82
1.85
8.83
7.34
6.42
5.38
4.21
2.93
7.18
6.25
5.60
4.81
3.85
2.75
4.78
4.16
3.73
3.21
2.57
1.83
1.09
1.14
1.17
1.19
1.22
1.25
6.10
5.10
4.48
3.77
2.96
2.07
17.6
14.9
13.1
11.0
8.64
6.02
10.3
8.44
7.33
6.10
4.73
3.26
1.20
1.23
1.25
1.27
1.28
1.30
5
x 2 1/2 x 1/4
3/16
1/8
11.36
8.78
6.03
0.233
0.174
0.116
7.7
11.4
18.6
18.5
25.7
40.1
3.14
2.41
1.65
9.40
7.51
5.34
3.76
3.01
2.14
1.73
1.77
1.80
4.83
3.79
2.65
3.13
2.53
1.82
2.50
2.03
1.46
0.999 2.95
1.02 2.33
1.05 1.64
7.93
6.26
4.40
4.99
3.89
2.70
1.18
1.20
1.22
5
x 2
x 3/8
5/16
1/4
3/16
1/8
14.72
12.70
10.51
8.15
5.61
0.349
0.291
0.233
0.174
0.116
2.73
3.87
5.58
8.49
14.2
11.3
14.2
18.5
25.7
40.1
4.09
3.52
2.91
2.24
1.54
10.4
9.35
8.08
6.50
4.65
4.14
3.74
3.23
2.60
1.86
1.59
1.63
1.67
1.70
1.74
5.71
5.05
4.27
3.37
2.37
2.28
2.10
1.84
1.51
1.10
2.28
2.10
1.84
1.51
1.10
0.748
0.772
0.797
0.823
0.848
2.88
2.57
2.20
1.75
1.24
6.61
5.99
5.17
4.15
2.95
5.20
4.59
3.88
3.05
2.13
1.07
1.08
1.10
1.12
1.13
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
12
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
Y-Y Axis
X-X Axis
4
x 3
x 3/8
5/16
1/4
3/16
1/8
14.72
12.70
10.51
8.15
5.61
0.349
0.291
0.233
0.174
0.116
5.60
7.31
9.88
14.2
22.9
8.46
10.7
14.2
20.0
31.5
4.09
3.52
2.91
2.24
1.54
7.93
7.14
6.15
4.93
3.52
3.97
3.57
3.07
2.47
1.76
1.39
1.42
1.45
1.49
1.52
5.12
4.51
3.81
3.00
2.11
5.01
4.52
3.91
3.16
2.27
3.34
3.02
2.61
2.10
1.51
1.11
1.13
1.16
1.19
1.21
4.18
3.69
3.12
2.46
1.73
10.6
9.41
7.96
6.26
4.38
6.59
5.75
4.81
3.74
2.59
1.07
1.08
1.10
1.12
1.13
4
x 2 1/2 x 3/8
5/16
1/4
3/16
1/8
13.44
11.64
9.66
7.51
5.18
0.349
0.291
0.233
0.174
0.116
4.16
5.59
7.73
11.4
18.6
8.46
10.7
14.2
20.0
31.5
3.74
3.23
2.67
2.06
1.42
6.77
6.13
5.32
4.30
3.09
3.38
3.07
2.66
2.15
1.54
1.35
1.38
1.41
1.44
1.47
4.48
3.97
3.38
2.67
1.88
3.17
2.89
2.53
2.06
1.49
2.54
2.32
2.02
1.65
1.19
0.922
0.947
0.973
0.999
1.030
3.20
2.85
2.43
1.93
1.36
7.57
6.77
5.78
4.59
3.23
5.32
4.67
3.93
3.08
2.14
0.98
1.00
1.02
1.03
1.05
4
x 2
x 3/8
5/16
1/4
3/16
1/8
12.17
10.58
8.81
6.87
4.75
0.349
0.291
0.233
0.174
0.116
2.73
3.87
5.58
8.49
14.2
8.46
10.7
14.2
20.0
31.5
3.39
2.94
2.44
1.89
1.30
5.60
5.13
4.49
3.66
2.65
2.80
2.56
2.25
1.83
1.32
1.29
1.32
1.36
1.39
1.43
3.84
3.43
2.94
2.34
1.66
1.80
1.67
1.48
1.22
0.898
1.80
1.67
1.48
1.22
0.898
0.729
0.754
0.779
0.804
0.830
2.31
2.08
1.79
1.43
1.02
4.83
4.40
3.82
3.08
2.20
4.04
3.59
3.05
2.41
1.69
0.90
0.92
0.93
0.95
0.97
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
in. in. 31/2 x 2 1/2 x 3/8
5/16
1/4
3/16
1/8
b/t
h/t
Ib.
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
0.904
0.930
0.956
0.983
1.01
Y-Y Axis
X-X Axis
12.17
10.58
8.81
6.87
4.75
0.349
0.291
0.233
0.174
0.116
4.16
5.59
7.73
11.4
18.6
7.03
9.03
12.0
17.1
27.2
3.39
2.94
2.44
1.89
1.30
4.75
4.34
3.79
3.09
2.23
2.72
2.48
2.17
1.76
1.28
1.18
1.22
1.25
1.28
1.31
3.59
3.20
2.74
2.18
1.54
2.77
2.54
2.23
1.82
1.33
2.21
2.03
1.78
1.46
1.06
2.82
2.52
2.16
1.72
1.22
6.16
5.53
4.75
3.78
2.67
4.57
4.03
3.40
2.67
1.87
0.90
0.92
0.93
0.95
0.97
x 1/4
3/16
1/8
7.96
6.23
4.33
0.233
0.174
0.116
7.73
11.4
18.6
9.88
14.2
22.9
2.21
1.71
1.19
2.57
2.11
1.54
1.72
1.41
1.03
1.08
1.11
1.14
2.16
1.73
1.23
1.93
1.59
1.16
1.54 0.935 1.90
1.27 0.963 1.52
0.931 0.990 1.09
3.74
3.00
2.13
2.87
2.27
1.59
0.85
0.87
0.88
31/2 x 1 1/2 x 1/4
3/16
1/8
7.11
5.59
3.90
0.233
0.174
0.116
3.44
5.62
9.93
12.0
17.1
27.2
1.97
1.54
1.07
2.55
2.12
1.57
1.46 1.14
1.21 1.17
0.896 1.21
1.98
1.60
1.15
0.638
0.544
0.411
0.851 0.569 1.06
0.725 0.594 0.867
0.548 0.619 0.630
1.79
1.49
1.09
1.88
1.51
1.08
0.77
0.78
0.80
3
x 2 1/2 x 5/16
1/4
3/16
1/8
9.51
7.96
6.23
4.33
0.291
0.233
0.174
0.116
5.59
7.73
11.4
18.6
7.31
9.88
14.2
22.9
2.64
2.21
1.71
1.19
2.92
2.57
2.11
1.54
1.94
1.72
1.41
1.03
1.05
1.08
1.11
1.14
2.51
2.16
1.73
1.23
2.18
1.93
1.59
1.16
1.74
1.54
1.27
0.931
0.908
0.935
0.963
0.990
2.20
1.90
1.52
1.09
4.34
3.74
3.00
2.13
3.39
2.87
2.27
1.59
0.83
0.85
0.87
0.88
3
x 2
x 5/16
1/4
3/16
1/8
8.45
7.11
5.59
3.90
0.291
0.233
0.174
0.116
3.87
5.58
8.49
14.2
7.31
9.88
14.2
22.9
2.35
1.97
1.54
1.07
2.38
2.13
1.77
1.30
1.59
1.42
1.18
0.867
1.01
1.04
1.07
1.10
2.11
1.83
1.48
1.06
1.24
1.11
0.932
0.692
1.24
1.11
0.932
0.692
0.725
0.751
0.778
0.804
1.58
1.38
1.12
0.803
2.87
2.52
2.05
1.47
2.60
2.23
1.78
1.25
0.75
0.77
0.78
0.80
3
x 1 1/2 x 1/4
3/16
1/8
6.26
4.96
3.48
0.233
0.174
0.116
3.44
5.62
9.93
9.88
14.2
22.9
1.74
1.37
0.96
1.68
1.42
1.06
1.12 0.982
0.945 1.02
0.706 1.05
1.51
1.24
0.895
0.543
0.467
0.355
0.725 0.559 0.911
0.622 0.584 0.752
0.474 0.610 0.550
1.44
1.21
0.886
1.58
1.28
0.920
0.68
0.70
0.72
31/2 x 2
13
Weight
Wall
per Thickness
Foot
t
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF RECTANGULAR HSS
Y
Nominal Size
in.
in.
Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
Cross
Sectional
Area
lx
Sx
rx
Zx
lx
Sx
rx
Zx
J
C
in.2
in.4
in.3
in.
in.3
in.4
in.3
in.
in.3
in.4
in.3
ft.2
Y-Y Axis
X-X Axis
x 3/16
1/8
4.32
3.05
0.174
0.116
2.75
5.62
14.2
22.9
1.19
0.84
1.07
0.817
0.713 0.947
0.545 0.987
0.989
0.728
0.173
0.138
0.345 0.380 0.432
0.276 0.405 0.325
0.526
0.408
0.792
0.585
0.62
0.63
x 3/16
1/8
1/4
6.26
4.96
3.48
0.233
0.174
0.116
5.58
8.49
14.2
7.73
11.4
18.6
1.74
1.37
0.956
1.33
1.12
0.833
1.06 0.874
0.894 0.904
0.667 0.934
1.37
1.12
0.809
0.930
0.786
0.589
0.930 0.731 1.17
0.786 0.758 0.956
0.589 0.785 0.694
1.90
1.55
1.12
1.82
1.46
1.04
0.68
0.70
0.72
2 1/2 x 11/2 x 1/4
3/16
1/8
5.41
4.32
3.05
0.233
0.174
0.116
3.44
5.62
9.93
7.73
11.4
18.6
1.51
1.19
0.84
1.03
0.882
0.668
0.822 0.826
0.705 0.860
0.535 0.892
1.11
0.915
0.671
0.449
0.390
0.300
0.599 0.546 0.764
0.520 0.572 0.636
0.399 0.597 0.469
1.10
0.929
0.687
1.29
1.05
0.759
0.60
0.62
0.63
2 1/2 x 1
x 3/16
1/8
3.68
2.63
0.174
0.116
2.75
5.62
11.4
18.6
1.02
0.724
0.646
0.503
0.517 0.796
0.403 0.834
0.713
0.532
0.143
0.115
0.285 0.374 0.360
0.230 0.399 0.274
0.412
0.322
0.648
0.483
0.53
0.55
x 3/16
1/8
4.64
3.27
0.174
0.116
8.49
14.2
9.93
16.4
1.28
0.898
0.859
0.646
0.764 0.819
0.574 0.848
0.952
0.693
0.713
0.538
0.713 0.747 0.877
0.538 0.774 0.639
1.32
0.957
1.30
0.927
0.66
0.68
2
x 11/2 x 3/16
1/8
3.68
2.63
0.174
0.116
5.62
9.93
8.49
14.2
1.02
0.72
0.495
0.383
0.495 0.697
0.383 0.728
0.639
0.475
0.313
0.244
0.417 0.554 0.521
0.325 0.581 0.389
0.664
0.496
0.822
0.599
0.53
0.55
2
x 1
x 3/16
1/8
3.04
2.20
0.174
0.116
2.75
5.62
8.49
14.2
0.845
0.608
0.350
0.280
0.350 0.643
0.280 0.679
0.480
0.366
0.112 0.225 0.365 0.288
0.0922 0.184 0.390 0.223
0.301
0.238
0.505
0.380
0.45
0.47
3
x 1
2 1/2 x 2
2 1/4 x 2
14
in. Weight
Wall
per Thickness
Foot
t
Y
DIMENSIONS AND SECTION PROPERTIES ROPERTIES OF SQUARE HSS
X
Nominal Size
in.
15
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
Torsional
Stiffness
Constant
Torsional
Shear
Constant
Zx
J
C
in.
in.3
in.4
in.3
Cross
Sectional
Area
lx
Sx
rx
in.2
in.4
in.3
in. Surface
Area
Per Foot
ft.2
32 x 32 x 5/8*
1/2*
3/8*
259.83
210.72
159.37
0.625
0.500
0.375
48.2
61.0
82.3
48.2
61.0
82.3
76.4
61.9
46.8
12300 771
10100 634
7750 485
12.7
12.8
12.9
890
727
553
19700
15900
12000
37 1230
991
750
10.34
10.45
10.51
30 x 30 x 5/8*
1/2*
3/8*
242.82
197.11
149.16
0.625
0.500
0.375
45.0
57.0
77.0
45.0
57.0
77.0
71.4
57.9
43,8
10100 673
8320 555
6370 424
11.9
12.0
12.1
778
637
485
16200
13000
9870
1070
869
658
9.68
9.79
9.84
28 x 28 x 5/8*
1/2*
3/8*
225.80
183.50
138.95
0.625
0.500
0.375
41.8
53.0
71.7
41.8
53.0
71.7
66.4
53.9
40.8
8140
6730
5150
582
480
368
11.1
11.2
11.2
674
552
421
13100
10600
8010
933
755
572
9.01
9.12
9.17
26 x 26 x 5/8*
1/2*
3/8*
208.79
169.89
128.74
0.625
0.500
0.375
38.6
49.0
66.3
38.6
49.0
66.3
61.4
49.9
37.8
6460
5350
4110
497
411
316
10.3
10.4
10.4
577
474
362
10500
8430
6400
801
649
492
8.34
8.45
8.51
24 x 24 x 5/8*
1/2*
3/8*
191.78
156.28
118.53
0.625
0.500
0.375
35.4
45.0
61.0
35.4
45.0
61.0
56.4
45.9
34.8
5030
4170
3210
419
348
268
9.44
9.53
9.60
487
401
307
8180
6610
5020
679
551
418
7.68
7.79
7.84
22 x 22 x 5/8*
1/2*
3/8*
174.76
142.67
108.32
0.625
0.500
0.375
32.2
41.0
55.7
32.2
41.0
55.7
51.4
45.9
31.8
3820
3190
2460
347
290
223
8.62
8.72
8.78
406
335
256
6260
5070
3850
567
461
350
7.01
7.12
7.17
20 x 20 x 5/8*
1/2*
3/8*
157.75
129.06
98.12
0.625
0.500
0.375
29.0
37.0
50.3
29.0
37.0
50.3
46.4
37.9
28.8
2830
2370
1830
283
237
183
6.99
7.90
7.97
264
275
211
4670
3790
2880
465
379
288
6.34
6.45
6.51
18 x 18 x 5/8*
1/2*
3/8*
140.73
115.45
87.91
0.625
0.500
0.375
25.8
33.0
45.0
25.8
33.0
45.0
41.4
33.9
25.8
2020
1700
1320
224
189
147
6.99
7.08
7.15
264
220
169
3370
2740
2090
373
305
232
5.68
5.79
5.84
16 x 16 x 5/8
1/2
3/8
5/16
127.37
103.30
78.52
65.87
0.581
0.465
0.349
0.291
24.5
31.4
42.8
52.0
24.5
31.4
42.8
52.0
35.0
28.3
21.5
18.1
1370
1130
873
739
171
141
109
92.3
6.25
6.31
6.37
63.9
200
164
126
106
2170
1770
1350
1140
276
224
171
144
5.17
5.20
5.23
5.25
This size produced by the submerged arc weld (SAW) process
X
Y
DIMENSIONS AND SECTION PROPERTIES OF SQUARE HSS
Nominal Size
in.
16
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Y
Torsional
Stiffness
Constant
Torsional
Shear
Constant
J
C
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
lx
Sx
rx
Zx
in.2
in.4
in.3
in.
Surface
Area
Per Foot
X
X
Y
14 x 14 x 5/8
1/2
3/8
5/16
110.36
89.68
68.31
57.36
0.581
0.465
0.349
0.291
21.1
27.1
37.1
45.1
21.1
27.1
37.1
45.1
30.3
24.6
18.7
15.7
897
743
577
490
128
106
82.5
69.9
5.44
5.49
5.55
5.58
151
124
95.4
80.5
1430
1170
900
759
208
170
130
109
4.50
4.53
4.57
4.58
12 x 12 x 5/8
1/2
3/8
5/16
1/4
3/16
93.34
76.07
58.10
48.86
39.43
29.84
0.581
0.465
0.349
0.291
0.233
0.174
17.7
22.8
31.4
38.2
48.5
66.0
17.7
22.8
31.4
38.2
48.5
66.0
25.7
20.9
16.0
13.4
10.8
8.15
548
457
357
304
248
189
91.4
76.2
59.5
50.7
41.4
31.5
4.62
4.68
4.73
4.76
4.79
4.82
109
89.6
69.2
58.6
47.6
36.0
885
728
561
474
384
290
151
123
94.6
79.7
64.5
48.6
3.83
3.87
3.90
3.92
3.93
3.95
10 x 10 x 5/8
1/2
3/8
5/16
1/4
3/16
76.33
62.46
47.90
40.35
32.63
24.73
0.581
0.465
0.349
0.291
0.233
0.174
14.2
18.5
25.7
31.4
39.9
54.5
14.2
18.5
25.7
31.4
39.9
54.5
21.0
17.2
13.2
11.1
8.96
6.76
304
256
202
172
141
108
60.8
51.2
40.4
34.5
28.3
21.6
3.80
3.86
3.92
3.94
3.97
4.00
73.2
60.7
47.2
40.1
32.7
24.8
498
412
320
271
220
167
102
84.2
64.8
54.8
44.4
33.6
3.17
3.20
3.23
3.25
3.27
3.28
9
x 9
x 5/8
1/2
3/8
5/16
1/4
3/16
1/8
67.82
55.66
42.79
36.10
29.23
22.18
14.96
0.581
0.465
0.349
0.291
0.233
0.174
0.116
12.5
16.4
22.8
27.9
35.6
48.7
74.6
12.5
16.4
22.8
27.9
35.6
48.7
74.6
18.7
15.3
11.8
9.92
8.03
6.06
4.09
216
183
145
124
102
78.2
53.5
47.9
40.6
32.2
27.6
22.7
17.4
11.9
3.40
3.45
3.51
3.54
3.56
3.59
3.62
58.1
48.4
37.8
32.1
26.2
20.0
13.6
356
296
231
196
159
121
82.0
81.6
67.4
52.1
44.0
35.8
27.1
18.3
2.80
2.87
2.90
2.92
2.93
2.95
2.97
8
x 8
x 5/8
1/2
3/8
5/16
1/4
3/16
1/8
59.32
48.85
37.69
31.84
25.82
19.63
13.26
0.581
0.465
0.349
0.291
0.233
0.174
0.116
10.8
14.2
19.9
24.5
31.3
43.0
66.0
10.8
14.2
19.9
24.5
31.3
43.0
66.0
16.4
13.5
10.4
8.76
7.10
5.37
3.62
146
125
100
85.6
70.7
54.4
37.4
36.5
31.2
24.9
21.4
17.7
13.6
9.34
2.99
3.04
3.10
3.13
3.15
3.18
3.21
44.7
37.5
29.4
25.1
20.5
15.7
10.7
244
204
160
136
111
84.5
57.3
63.2
52.4
40.7
34.5
28.1
21.3
14.4
2.50
2.53
2.57
2.58
2.60
2.62
2.63
7
x 7
x 5/8
1/2
3/8
5/16
1/4
3/16
1/8
50.81
42.05
32.58
27.59
22.42
17.08
11.56
0.581
0.465
0.349
0.291
0.233
0.174
0.116
9.05
12.1
17.1
21.1
27.0
37.2
57.3
9.05
12.1
17.1
21.1
27.0
37.2
57.3
14.0
11.6
8.97
7.59
6.17
4.67
3.16
93.4
80.5
65.0
56.1
46.5
36.0
24.8
26.7
23.0
18.6
16.0
13.3
10.3
7.09
2.58
2.63
2.69
2.72
2.75
2.77
2.80
33.1
27.9
22.1
18.9
15.5
11.9
8.13
158
133
105
89.7
73.5
56.1
38.2
47.1
39.3
30.7
26.1
21.3
16.2
11.0
2.17
2.20
2.23
2.25
2.27
2.28
2.30
Y
DIMENSIONS AND SECTION PROPERTIES OF SQUARE HSS
Nominal Size
in.
in. Ib.
b/t
h/t
in. Torsional
Stiffness
Constant
Torsional
Shear
Constant
J
C
in.3
in.4
in.3
ft.2
Cross
Sectional
Area
lx
Sx
rx
Zx
in.2
in.4
in.3
in.
Surface
Area
Per Foot
x 5/8
1/2
3/8
5/16
1/4
3/16
1/8
42.30
35.24
27.48
23/34
19.02
14.53
9.86
0.581
0.465
0.349
0.291
0.233
0.174
0.116
7.3
9.9
14.2
17.6
22.8
31.5
48.7
7.3
9.9
14.2
17.6
22.8
31.5
48.7
11.7
9.74
7.58
6.43
5.24
3.98
2.70
55.2
48.3
39.5
34.3
28.6
22.3
15.5
18.4
16.1
13.2
11.4
9.54
7.42
5.15
2.17
2.23
2.28
2.31
2.34
2.37
2.39
23.2
19.8
15.8
13.6
11.2
8.63
5.92
94.9
81.1
64.6
55.4
45.6
35.0
23.9
33.4
28.1
22.1
18.9
15.4
11.8
8.03
1.83
1.87
1.90
1.92
1.93
1.95
1.97
5 1/2 x 5 1/2 x 3/8
5/16
1/4
3/16
1/8
24.93
21.21
17.32
13.25
9.01
0.349
0.291
0.233
0.174
0.116
12.8
15.9
20.6
28.6
44.4
12.8
15.9
20.6
28.6
44.4
6.88
5.85
4.77
3.63
2.46
29.7
25.9
21.7
17.0
11.8
10.8
9.43
7.90
6.17
4.30
2.08
2.11
2.13
2.16
2.19
13.1
11.3
9.32
7.19
4.95
49.0
42.2
34.8
26.7
18.3
18.4
15.7
12.9
9.85
6.72
1.73
1.75
1.77
1.78
1.80
5
x 1/2
3/8
5/16
1/4
3/16
1/8
28.43
22.37
19.08
15.62
11.97
8.16
0.465
0.349
0.291
0.233
0.174
0.116
7.75
11.3
14.2
18.5
25.7
40.1
7.75
11.3
14.2
18.5
25.7
40.1
7.88
6.18
5.26
4.30
3.28
2.23
26.0
21.7
19.0
16.0
12.6
8.80
10.4
8.68
7.62
6.41
5.03
3.52
1.82
1.87
1.90
1.93
1.96
1.99
13.1
10.6
9.16
7.61
5.89
4.07
44.6
36.1
31.2
25.8
19.9
13.7
18.7
14.9
12.8
10.5
8.08
5.53
1.53
1.57
1.58
1.60
1.62
1.63
4 1/2 x 4 1/2 x 1/2
3/8
5/16
1/4
3/16
1/8
25.03
19.82
16.96
13.91
10.70
7.31
0.465
0.349
0.291
0.233
0.174
0.116
6.68
9.89
12.5
16.3
22.9
35.8
6.68
9.89
12.5
16.3
22.9
35.8
6.95
5.48
4.68
3.84
2.93
2.00
18.1
15.3
13.5
11.4
9.02
6.35
8.03
6.79
6.00
5.08
4.01
2.82
1.61
1.67
1.70
1.73
1.75
1.78
10.2
8.36
7.27
6.06
4.71
3.27
31.3
25.7
22.3
18.5
14.4
9.92
14.8
11.9
10.2
8.44
6.49
4.45
1.37
1.40
1.42
1.43
1.45
1.47
4
21.63
17.27
14.83
12.21
9.42
6.46
0.465
0.349
0.291
0.233
0.174
0.116
5.60
8.46
10.7
14.2
20.0
31.5
5.60
8.46
10.7
14.2
20.0
31.5
6.02
4.78
4.10
3.37
2.58
1.77
11.9
10.3
9.14
7.80
6.21
4.40
5.97
5.13
4.57
3.90
3.10
2.20
1.41
1.47
1.49
1.52
1.55
1.58
7.70
6.39
5.59
4.69
3.67
2.56
21.0
17.5
15.3
12.8
10.0
6.91
11.2
9.14
7.91
6.56
5.07
3.49
1.20
1.23
1.25
1.27
1.28
1.30
6
17
in.
Weight
Wall
per Thickness
Foot
t
X
x 6
x 5
x 4
x 1/2
3/8
5/16
1/4
3/16
1/8
X
Y
Y
DIMENSIONS AND SECTION PROPERTIES OF SQUARE HSS
X
X
Y
Nominal Size
in.
18
in.
in. Weight
Wall
per Thickness
Foot
t
Ib.
b/t
h/t
in. Cross
Sectional
Area
lx
Sx
rx
Zx
in.2
in.4
in.3
in.
in.3
J
C
in.4
in.3
x
Torsional
Stiffness
Constant
Torsional
Shear
Constant
Surface
Area
Per Foot
ft.2
3 1/2 x 3 1/2 x 3/8
5/16
1/4
3/16
1/8
14.72
12.70
10.51
8.15
5.61
0.349
0.291
0.233
0.174
0.116
7.03
9.03
12.0
17.1
27.2
7.03
9.03
12.0
17.1
27.2
4.09
3.52
2.91
2.24
1.54
6.49
5.84
5.04
4.05
2.90
3.71
3.34
2.88
2.31
1.66
1.26
1.29
1.32
1.35
1.37
4.69
4.14
3.50
2.76
1.93
11.2
9.89
8.35
6.56
4.58
6.77
5.90
4.92
3.83
2.65
1.07
1.08
1.10
1.12
1.13
3
12.17
10.58
8.81
6.87
4.75
0.349
0.291
0.233
0.174
0.116
5.60
7.31
9.88
14.2
22.9
5.60
7.31
9.88
14.2
22.9
3.39
2.94
2.44
1.89
1.30
3.78
3.45
3.02
2.46
1.78
2.52
2.30
2.01
1.64
1.19
1.06
1.08
1.11
1.14
1.17
3.25
2.90
2.48
1.97
1.40
6.64
5.94
5.08
4.03
2.84
4.74
4.18
3.52
2.76
1.92
0.90
0.92
0.93
0.95
0.97
2 1/2 x 2 1/2 x 5/16
1/4
3/16
1/8
8.45
7.11
5.59
3.90
0.291
0.233
0.174
0.116
5.59
7.73
11.4
18.6
5.59
7.73
11.4
18.6
2.35
1.97
1.54
1.07
1.82
1.63
1.35
1.00
1.46
1.30
1.08
0.80
0.88
0.91
0.94
0.97
1.88
1.63
1.32
0.95
3.20
2.79
2.25
1.61
2.74
2.35
1.86
1.31
0.75
0.77
0.78
0.80
2 1/4 x 3 1/4 x 1/4
3/16
1/8
6.26
4.96
3.48
0.233
0.174
0.116
6.66
9.93
16.4
6.66
9.93
16.4
1.74
1.37
0.96
1.13
0.95
0.71
1.01
0.85
0.63
0.81
0.84
0.86
1.28
1.04
0.76
1.96
1.60
1.15
1.85
1.48
1.05
0.68
0.70
0.72
2
5.41
4.32
3.05
0.233
0.174
0.116
5.58
8.49
14.2
5.58
8.49
14.2
1.51
1.19
0.84
0.75
0.64
0.49
0.75
0.64
0.49
0.70
0.73
0.76
0.96
0.80
0.58
1.31
1.09
0.796
1.41
1.14
0.817
0.60
0.62
0.63
x 3
x 2
x 3/8
5/16
1/4
3/16
1/8
x 1/4
3/16
1/8
Y
X
DIMENSIONS AND SECTION PROPERTIES OF ROUND HSS
Nominal Size
Outside
Diameter
in. 19
Y
Wall
Thickness
Wall
Weight
per
Foot
t
CrossSectional
Area
in.
lb.
in.
in.2
in.4
D/t
X
lx
x
S
x
Torsional
Stiffness
Constant
Torsional
Shear
Constant
rx
Zx
in.3
in.
in.3
in.4
in.3
J
C
Surface
Area
Per Foot
ft.2
20.000
0.500
0.375
104
78.67
0.465
0.349
43.0
57.3
28.5
21.5
1360
1040
136
104
6.91
6.95
177
135
2720
2080
272
208
5.24
5.24
18.000
0.500
0.375
93.54
70.65
0.465
0.349
38.7
51.6
25.6
19.4
985
754
109
83.8
6.20
6.24
143
109
1970
1510
219
168
4.71
4.71
16.000
0.500
0.438
0.375
0.312
82.85
72.86
62.64
52.32
0.465
0.407
0.349
0.291
34.4
39.3
45.8
55.0
22.7
19.9
17.2
14.4
685
606
526
443
85.7
75.8
65.7
55.4
5.49
5.51
5.53
5.55
112
99.0
85.5
71.8
1370
1210
1050
886
171
152
131
111
4.19
4.19
4.19
4.19
14.000
0.500
0.375
0.312
72.16
54.62
45.65
0.465
0.349
0.291
30.1
40.1
48.1
19.8
15.0
12.5
453
349
295
64.8
49.8
42.1
4.79
4.83
4.85
85.2
65.1
54.7
907
698
589
130
100
84.2
3.67
3.67
3.67
12.750
0.500
0.375
0.250
65.48
49.61
33.41
0.465
0.349
0.233
27.4
36.5
54.7
17.9
13.6
9.16
339
262
180
53.2
41.0
28.2
4.35
4.39
4.43
70.2
53.7
36.5
678
523
359
106
82.1
56.3
3.34
3.34
3.34
Y
X
DIMENSIONS AND SECTION PROPERTIES OF ROUND HSS
Nominal Size
Outside
Diameter
in. Wall
t
CrossSectional
Area
in.
lb.
in.
in.2
in.4
28.5
21.5
0.500
0.375
0.188
54.79
41.59
28.06
0.465
0.349
0.233
15.0
11.4
7.70
10.000
0.625
0.500
0.375
0.312
0.250
0.188
62.64
50.78
38.58
32.31
26.06
19.72
0.581
0.465
0.349
0.291
0.233
0.174
17.2
13.9
10.6
8.88
7.15
5.37
0.500
0.375
0.312
0.250
0.188
48.77
37.08
31.06
25.05
18.97
0.465
0.349
0.291
0.233
0.174
13.4
10.2
8.53
6.87
5.17
0.500
0.375
0.312
0.250
0.188
43.43
33.07
28.58
22.38
16.96
0.465
0.349
0.300
0.233
0.174
11.9
9.07
7.85
6.14
4.62
8.625
20
Wall
Thickness
10.750
9.625
Y
Weight
per
Foot
D/t
X
25.6
19.4
22.7
19.9
17.2
14.4
19.8
15.0
12.5
17.9
13.6
9.16
Torsional
Shear
Constant
Surface
Area
Per Foot
rx
Zx
in.3
in.
in.3
in.4
in.3
199
154
106
37.0
28.7
19.8
3.64
3.68
3.72
49.2
37.8
25.8
398
309
213
74.1
57.4
39.6
2.81
2.81
2.81
191
159
123
105
85.3
64.8
38.3
31.7
24.7
20.9
17.1
13.0
3.34
3.38
3.41
3.43
3.45
3.47
51.6
42.3
32.5
27.4
22.2
16.8
383
317
247
209
171
130
76.6
63.5
49.3
41.9
34.1
25.9
2.62
2.62
2.62
2.62
2.62
2.62
141
110
93.0
75.9
57.7
29.2
22.8
19.3
15.8
12.0
3.24
3.28
3.30
3.32
3.34
39.0
30.0
25.4
20.6
15.5
281
219
186
152
115
58.5
45.5
38.7
31.5
24.0
2.52
2.52
2.52
2.52
2.52
100
77.8
68.1
54.1
41.3
23.1
18.0
15.8
12.5
9.57
2.89
2.93
2.95
2.97
2.99
31.0
23.9
20.8
16.4
12.4
199
156
136
108
82.5
46.2
36.1
31.6
25.1
19.1
2.26
2.26
2.26
2.26
2.26
lx
x
S
x
Torsional
Stiffness
Constant
J
C
ft.2
Y
X
DIMENSIONS AND SECTION PROPERTIES OF ROUND HSS
Nominal Size
Outside
Diameter
in. 21
Y
Wall
Thickness
Wall
Weight
per
Foot
t
CrossSectional
Area
in.
lb.
in.
in.2
in.4
D/t
X
lx
x
S
x
Torsional
Stiffness
Constant
Torsional
Shear
Constant
rx
Zx
in.3
in.
in.3
in.4
in.3
J
C
Surface
Area
Per Foot
ft.2
7.625
0.375
0.328
29.06
25.59
0.349
0.305
21.8
25.0
7.98
7.01
52.9
47.1
13.9
12.3
2.58
2.59
18.5
16.4
106
94.1
27.8
24.7
2.00
2.00
7.500
0.500
0.375
0.312
0.250
0.188
37.42
28.56
23.97
19.38
14.70
0.465
0.349
0.291
0.233
0.174
16.1
21.5
25.8
32.2
43.1
10.3
7.84
6.59
5.32
4.00
63.9
50.2
42.9
35.2
26.9
17.0
13.4
11.4
9.37
7.17
2.49
2.53
2.55
2.57
2.59
23.0
17.9
15.1
12.3
9.34
128
100
85.8
70.3
53.8
34.1
26.8
22.9
18.7
14.3
1.96
1.96
1.96
1.96
1.96
7.000
0.500
0.375
0.312
0.250
0.188
0.125
34.74
26.56
22.31
18.04
13.69
9.19
0.465
0.349
0.291
0.233
0.174
0.116
15.1
20.1
24.1
30.0
40.2
60.3
9.55
7.29
6.13
4.95
3.73
2.51
51.2
40.4
34.6
28.4
21.7
14.9
14.6
11.6
9.88
8.11
6.21
4.25
2.32
2.35
2.37
2.39
2.41
2.43
19.9
15.5
13.1
10.7
8.11
5.50
102
80.9
69.1
56.8
43.5
29.7
29.3
23.1
19.8
16.2
12.4
8.49
1.83
1.83
1.83
1.83
1.83
1.83
Y
X
DIMENSIONS AND SECTION PROPERTIES OF ROUND HSS
Nominal Size
Outside
Diameter
in. 22
Y
Wall
Thickness
Wall
Weight
per
Foot
t
CrossSectional
Area
in.
lb.
in.
in.2
in.4
D/t
X
lx
x
S
x
Torsional
Stiffness
Constant
Torsional
Shear
Constant
rx
Zx
in.3
in.
in.3
in.4
in.3
J
C
Surface
Area
Per Foot
ft.2
6.875
0.500
0.375
0.312
0.250
0.188
34.07
26.06
21.89
17.71
13.44
0.465
0.349
0.291
0.233
0.174
14.8
19.7
23.6
29.5
39.5
9.36
7.16
6.02
4.86
3.66
48.3
38.2
32.7
26.8
20.6
14.1
11.1
9.51
7.81
5.99
2.27
2.31
2.33
2.35
2.37
19.1
14.9
12.6
10.3
7.81
96.7
76.4
65.4
53.7
41.1
28.1
22.2
19.0
15.6
12.0
1.80
1.80
1.80
1.80
1.80
6.625
0.500
0.432
0.375
0.312
0.280
0.250
0.188
0.125
32.74
28.60
25.05
21.06
18.99
17.04
12.94
8.69
0.465
0.402
0.349
0.291
0.260
0.233
0.174
0.116
14.2
16.4
19.0
22.8
25.4
28.4
38.1
57.1
9.00
7.88
6.88
5.79
5.22
4.68
3.53
2.37
42.9
38.2
34.0
29.1
26.4
23.9
18.4
12.6
13.0
11.5
10.3
8.79
7.96
7.22
5.54
3.79
2.18
2.20
2.22
2.24
2.25
2.26
2.28
2.30
17.7
15.6
13.8
11.7
10.5
9.52
7.24
4.92
85.9
76.4
68.0
58.2
52.7
47.9
36.7
25.1
25.9
23.1
20.5
17.6
15.9
14.4
11.1
7.59
1.73
1.73
1.73
1.73
1.73
1.73
1.73
1.73
6.000
0.500
0.375
0.312
0.280
0.250
0.188
0.125
29.40
22.55
18.97
17.12
15.37
11.68
7.85
0.465
0.349
0.291
0.260
0.233
0.174
0.116
12.9
17.2
20.6
23.1
25.8
34.5
51.7
8.09
6.20
5.22
4.69
4.22
3.18
2.14
31.2
24.8
21.3
19.3
17.6
13.5
9.28
10.4
8.28
7.11
6.45
5.86
4.51
3.09
1.96
2.00
2.02
2.03
2.04
2.06
2.08
14.3
11.2
9.49
8.57
7.75
5.91
4.02
62.4
49.7
42.6
38.7
35.2
27.0
18.6
20.8
16.6
14.2
12.9
11.7
9.02
6.19
1.57
1.57
1.57
1.57
1.57
1.57
1.57
Y
X
DIMENSIONS AND SECTION PROPERTIES OF ROUND HSS
Nominal Size
Outside
Diameter
in. Wall
Thickness
Wall
t
CrossSectional
Area
in.
lb.
in.
in.2
in.4
lx
x
S
x
Torsional
Stiffness
Constant
Torsional
Shear
Constant
rx
Zx
in.3
in.
in.3
in.4
in.3
J
C
Surface
Area
Per Foot
ft.2
5.563
0.500
0.375
0.258
0.188
0.134
27.06
20.80
14.63
10.80
7.78
0.465
0.349
0.240
0.174
0.124
12.0
15.9
23.2
32.0
44.9
7.45
5.72
4.01
2.95
2.12
24.4
19.5
14.2
10.7
7.84
8.77
7.02
5.12
3.85
2.82
.1.81
1.85
1.88
1.91
1.92
12.1
9.50
6.80
5.05
3.67
48.8
39.0
28.5
21.4
15.7
17.5
14.0
10.2
7.70
5.64
1.46
1.46
1.46
1.46
1.46
5.500
0.500
0.375
0.258
26.73
20.54
14.46
0.465
0.349
0.240
11.8
15.8
22.8
7.36
5.65
3.98
23.5
18.8
13.7
8.55
6.84
5.00
1.79
1.83
1.86
11.8
9.27
6.64
47.0
37.6
27.6
17.1
13.7
10.0
1.44
1.44
1.44
5.000
0.500
0.375
0.312
0.258
0.250
0.188
0.125
24.05
18.54
15.64
13.08
12.69
9.67
6.51
0.465
0.349
0.291
0.240
0.233
0.174
0.116
10.8
14.3
17.2
20.8
21.5
28.7
43.1
6.62
5.10
4.30
3.59
3.49
2.64
1.78
17.2
13.9
12.0
10.2
9.94
7.69
5.31
6.88
5.55
4.79
4.08
3.97
3.08
2.12
1.61
1.65
1.67
1.69
1.69
1.71
1.73
9.60
7.56
6.46
5.44
5.30
4.05
2.77
34.4
27.7
24.0
20.5
19.9
15.4
10.6
13.8
11.1
9.58
8.18
7.95
6.15
4.25
1.31
1.31
1.31
1.31
1.31
1.31
1.31
0.375
0.337
0.237
0.188
0.125
16.54
15.00
10.80
8.67
5.85
0.349
0.313
0.220
0.174
0.116
12.9
14.4
20.5
25.9
38.8
4.55
4.12
2.96
2.36
1.60
9.87
9.07
6.79
5.54
3.84
4.39
4.03
3.02
2.46
1.71
1.47
1.48
1.52
1.53
1.55
6.03
5.50
4.03
3.26
2.23
19.7
18.1
13.6
11.1
7.68
8.78
8.06
6.04
4.93
3.41
1.18
1.18
1.18
1.18
1.18
0.313
0.250
0.237
0.226
0.220
0.188
0.125
12.34
10.02
9.53
9.12
8.89
7.66
5.18
0.291
0.233
0.220
0.210
0.205
0.174
0.116
13.7
17.2
18.1
19.0
19.5
23.0
34.5
3.39
2.76
2.61
2.50
2.44
2.09
1.42
5.87
4.91
4.68
4.50
4.41
3.83
2.67
2.93
2.45
2.34
2.25
2.21
1.92
1.34
1.32
1.33
1.34
1.34
1.34
1.35
1.37
4.01
3.31
3.15
3.02
2.96
2.55
1.75
11.7
9.82
9.36
9.01
8.83
7.67
5.34
5.87
4.91
4.68
4.50
4.41
3.83
2.67
1.05
1.05
1.05
1.05
1.05
1.05
1.05
4.5000
4.000
23
Y
Weight
per
Foot
D/t
X
Y
X
X
DIMENSIONS AND SECTION PROPERTIES OF ROUND HSS
Y
Nominal Size
Outside
Diameter
in. 24
Wall
Thickness
Wall
Weight
per
Foot
t
CrossSectional
Area
in.
lb.
in.
in.2
in.4
D/t
lx
x
S
x
Torsional
Stiffness
Constant
Torsional
Shear
Constant
rx
Zx
in.3
in.
in.3
in.4
in.3
J
C
Surface
Area
Per Foot
ft.2
3.500
0.313
0.300
0.250
0.216
0.203
0.188
0.125
10.66
10.26
8.69
7.58
7.15
6.66
4.51
0.291
0.279
0.233
0.201
0.189
0.174
0.116
12.0
12.5
15.0
17.4
18.5
20.1
30.2
2.93
2.83
2.39
2.08
1.97
1.82
1.23
3.81
3.69
3.21
2.84
2.70
2.52
1.77
2.18
2.11
1.83
1.63
1.54
1.44
1.01
1.14
1.14
1.16
1.17
1.17
1.18
1.20
3.00
2.90
2.49
2.19
2.07
1.93
1.33
7.61
7.38
6.41
5.69
5.41
5.04
3.53
4.35
4.22
3.66
3.25
3.09
2.88
2.02
0.92
0.92
0.92
0.92
0.92
0.92
0.92
3.000
0.250
0.216
0.203
0.188
0.152
0.134
0.125
7.35
6.43
6.07
5.65
4.63
4.11
3.84
0.233
0.201
0.189
0.174
0.141
0.124
0.116
12.9
14.9
15.9
17.2
21.3
24.2
25.9
2.03
1.77
1.67
1.54
1.27
1.12
1.05
1.95
1.74
1.66
1.55
1.30
1.16
1.09
1.30
1.16
1.10
1.03
0.865
0.774
0.730
0.982
0.992
0.996
1.00
1.01
1.02
1.02
1.79
1.58
1.50
1.39
1.15
1.03
0.965
3.90
3.48
3.31
3.10
2.59
2.32
2.19
2.60
2.32
2.21
2.06
1.73
1.55
1.46
0.79
0.79
0.79
0.79
0.79
0.79
0.79
2.875
0.250
0.203
0.188
0.125
7.02
5.80
5.40
3.67
0.233
0.189
0.174
0.116
12.3
15.2
16.5
24.8
1.93
1.59
1.48
1.01
1.70
1.45
1.35
0.958
1.18
1.01
0.941
0.667
0.938
0.952
0.957
0.976
1.63
1.37
1.27
0.884
3.40
2.89
2.70
1.92
2.37
2.01
1.88
1.33
0.75
0.75
0.75
0.75
2.500
0.250
0.188
0.125
6.01
4.65
3.17
0.233
0.174
0.116
10.7
14.4
21.6
1.66
1.27
0.869
1.08
0.865
0.619
0.862 0.806 1.20
0.692 0.825 0.943
0.495 0.844 0.660
2.15
1.73
1.24
1.72
1.38
0.990
0.65
0.65
0.65
2.375
0.250
0.218
0.188
0.154
0.125
0.250
0.218
0.188
0.154
0.125
0.233
0.203
0.174
0.143
0.116
10.2
11.7
13.6
16.6
20.5
1.57
1.39
1.20
1.00
0.82
0.910
0.824
0.733
0.627
0.527
0.766
0.694
0.617
0.528
0.443
1.82
1.65
1.47
1.25
1.05
1.53
1.39
1.23
1.06
0.887
0.62
0.62
0.62
0.62
0.62
1.900
0.188
0.145
0.120
3.44
0.145
2.28
0.174
0.135
0.111
10.9
14.1
17.1
0.943
0.75
0.624
0.355
0.293
0.251
0.374 0.613 0.520
0.309 0.626 0.421
0.264 0.634 0.356
0.710
0.586
0.501
0.747
0.617
0.527
0.50
0.50
0.50
1.660
0.140
0.140
0.130
12.8
.63
0.184
0.222 0.543 0.305
0.368
0.444
0.43
0.762
0.771
0.781
0.791
0.800
1.07
0.960
0.845
0.713
0.592
2516 Waukegan Road, Suite 172, Glenview, IL 60025
Tel: 847.461.1701 • Fax: 847.660.7981
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