Joist to Joist Connections - I-Joist
TFI - Top Fix Hanger
The Cullen TFI (Top Fix I-Joist) hanger offers one standard design
that is quick and simple to install. The TFI hanger combines a cost
effective connector with optimum performance.
MATERIAL
•
1.2mm galvanised mild steel - G275
I-Joist to I-Joist
I-Joist to double I-Joist
Double I-Joist to LVL / Glulam
Single / Double Joists
Fixing
(Quantity)
Hanger
Model
No
W
H
B
Top /
Joist
Face
TFI46/195
TFI46/200
TFI46/220
TFI46/235
TFI46/241
TFI46/245
TFI46/302
TFI46/350
TFI46/356
TFI46/360
TFI46/400
TFI46/406
TFI46/450
46
46
46
46
46
46
46
46
46
46
46
46
46
194
199
219
233
240
244
301
349
355
359
399
405
449
50
50
50
50
50
50
50
50
50
50
50
50
50
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
4/8
2
2
2
2
2
2
2
2
2
2
2
2
2
Safe Working Loads (kN) - Long Term
Uplift
Short
Term
(kN)
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
I-Joist
I-Joist
I-Joist
I-Joist
I-Joist
(solid timber
flanges)
(LVL flanges)
(solid timber
flanges)
(solid timber
flanges)
(LVL flanges)
to
I Joist
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
to
I Joist
6.90
6.90
6.90
6.90
6.90
6.90
6.90
6.90
6.90
6.90
6.90
6.90
6.90
to
GL
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
to
LVL
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
to
LVL
7.50
7.50
7.50
7.50
7.50
7.50
7.50
7.50
7.50
7.50
7.50
7.50
7.50
GL
LVL
to
GL
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
6.64
to
LVL
11.06
11.06
11.06
11.06
11.06
11.06
11.06
11.06
11.06
11.06
11.06
11.06
11.06
Hangers shown above are for 45mm wide joists, TFI’s are available in widths of 39, 46, 52, 61, 75, 78, 92 and 100mm
Page 22
Joist to Joist Connections - I-Joist
Connections to Steelwork
Fig 1. Hanger fixed to timber packer
secured to top of steel beam.
Hanger must be deeper than steel beam to
stop hanger rotation
Fig 2. Hanger fixed to timber packer
secured to top of steel beam.
Timber packer fixed to web of beam to stop
hanger rotation.
Fig 3. Hanger fixed directly to top flange of
steel beam.
Hanger must be deeper than steel beam to
stop hanger rotation.
Fig 4. Hanger fixed directly to top flange of
steel beam .
Timber packer fixed to web of beam to stop
hanger rotation.
Bottom of hanger extends past bottom flange
of steel beam to stop hanger rotation
Bottom of hanger stops short of bottom
flange of steel beam NO RESISTANCE TO
ROTATION please refer to fig 2 & 4
GENERAL NOTES
1.
All I-Joist to I-Joist safe working loads are based on I-Joist headers with fully nailed backer blocks (refer to “I-Joist manufacturers”
fixing detail)
2.
No web stiffeners were used to achieve safe working loads stated (I-Joist manufacturer may require web stiffeners)
3.
Use only 3.75 x 30mm sherardised square twist nails
4.
Safe working loads quoted are the maximum hanger capacity.
5.
All safe working loads derived from tests witnessed and verified by TimberSolve Limited.
6.
When multiple joists are used they must be connected together to act as a single unit (refer to “I-Joist manufacturers” fixing detail)
7.
Safe working load allowed without backer blocks is 1.8kN up to 245mm deep joists and 1.4kN on joists greater than 245mm deep.
8.
Where fixings are required to a steel beam a minimum of 38 x 89mm timber wallplate must be fixed to the steel and the TFI fixed to this
using the top nails and the upper face nails only (8no. Nails in total) fig 1. & fig 2. In this situation the safe working load is 4.2kN
9.
Where fixings are required directly to a steel beam the TFI can be shot fired directly into the steel beam (maximum steel thickness
12mm) using 4no. X-EDNI16 Hilti nails or equivalent, into the top fix hanger top flanges (2no. fixings per leg). In this situation the safe
working load is 6kN
Page 23