close

Enter

Log in using OpenID

1 story - Docstoc

embedDownload
The Essentials of Egress
Presented by
Seminar Scope




2
Code fundamentals for drawing reviews
Terms and definitions
Fire and life safety drawing review for
conditions of egress
Handouts for comparison of 2006 IBC and
NFPA 101, Life Safety Code
Schirmer Engineering Corporation
So Far…



3
The fundamental program for the project
is set.
The schematic design has been
accepted.
Next step:
– Develop the preliminary design.
Schirmer Engineering Corporation
Preliminary Design
Already determined are:
 The State/Local Codes
 If there is a Zoning/Planning Code
 If the project is in a Historic District
 If accessibility must be met (ADAAG –
ANSI A117.1)
4
Schirmer Engineering Corporation
Preliminary Design Model Building Codes
5

ICC

BOCA


ICBO
NFPA

SBCCI
International Building Code
(IBC)
BOCA National Building Code
(BNBC)
Uniform Building Code (UBC)
Building Construction and
Safety Code (NFPA 5000)
Life Safety Code (NFPA 101)
Standard Building Code (UBC)
Schirmer Engineering Corporation
Preliminary Design Model Building Codes - ICC
ICC International Family of Codes
IBC, IRC, IMC, IPC, IFC, etc.



47 states & Dept. of Defense use IBC
42 states & DC use IFC
45 states & DC use IRC
Website – www.iccsafe.org
6
Schirmer Engineering Corporation
Preliminary Design Model Building Codes - ICC
Website – www.iccsafe.org
7
Schirmer Engineering Corporation
Preliminary Design Design Items to Check

8
Already checked are:
– Site restrictions, e.g. easements?
– Construction Type?
– Occupancy Classification?
– Maximum building area limits?
– Maximum building height limits?
– Sprinkler systems requirements?
Schirmer Engineering Corporation
Preliminary Design Design Items to Check
But…what about the Means of Egress?
9
Schirmer Engineering Corporation
Terms & Definitions Means of Egress
A continuous and unobstructed path of
vertical and horizontal egress travel from
any occupied portion of a building or
structure to a public way. A means of
egress consists of three separate and
distinct parts: the exit access, the exit
and the exit discharge.
(2006 IBC)
10
Schirmer Engineering Corporation
Public Way
A street, alley or other parcel of land open
to the outside air leading to a street, that
has been deeded, dedicated or otherwise
permanently appropriated to the public
for public use and which has a clear width
and height of not less than 10 feet.
(2006 IBC)
11
Schirmer Engineering Corporation
Exit Access
That portion of a means of egress system
that leads from any occupied portion of a
building or structure to an exit.
(2006 IBC)
12
Schirmer Engineering Corporation
Exit Access and Exits
13
Schirmer Engineering Corporation
Exit
That portion of a means of egress system
which is separated from other interior spaces
of a building or structure by fire-resistancerated construction and opening protectives
as required to provide a protected path of
egress travel between the exit access and
the exit discharge.
(2006 IBC)
14
Schirmer Engineering Corporation
Types of Exits
Exits include exterior exit doors at ground
level, exit enclosures, exit passageways,
exterior exit stairs, exterior exit ramps
and horizontal exits.
15
Schirmer Engineering Corporation
16
Schirmer Engineering Corporation
Exit Discharge
That portion of a means of egress system
between the termination of an exit and a
public way.
(2006 IBC)
17
Schirmer Engineering Corporation
Exits and Exit Discharge
.
(2006 IBC)
18
Schirmer Engineering Corporation
More Terms & Definitions Exit Passageway
An exit component that is separated from other
interior spaces of a building or structure by
fire-resistance-rated construction and
opening protectives, and provides for a
protected path of egress travel in a vertical or
horizontal direction to the exit discharge or
public way.
(2006 IBC)
19
Schirmer Engineering Corporation
Accessible Means of Egress
A continuous and unobstructed way of
egress travel from any accessible point in
a building or facility to a public way.
(2006 IBC)
20
Schirmer Engineering Corporation
Area of Refuge
An area where persons unable to use
stairways can remain temporarily to await
instructions or assistance during
emergency evacuation.
(2006 IBC)
21
Schirmer Engineering Corporation
Plan Review for Egress




22
Code Matrix
Occupant Content (OLF’s)
Number of Exits
Exit Capacity (min. stair widths, door
widths, etc.)
Schirmer Engineering Corporation
Plan Review for Egress
23

Travel Distance

Common Path of Travel

Dead End Distance

Swing of Doors (in direction of exit, …)
Schirmer Engineering Corporation
Egress –
Occupant Load
The number of persons for which the
means of egress of a building or portion
thereof is designed.
(2006 IBC)
24
Schirmer Engineering Corporation
Use and Occupancy Classification






25
Assembly Group A
Business Group B
Educational Group E
Factory Group F
High-Hazard Group H
Institutional Group I




Mercantile Group M
Residential Group R
Storage Group S
Utility & Miscellaneous
Group U
Schirmer Engineering Corporation
Occupant Load Factors
NFPA
ICC
2006 LSC
IBC 2006
Table 7.3.1.2
T-1004.1.1
ft2 /occupant
ft2 /occupant
Assembly – Gaming floors (keno, slots, etc.)
11 gross
11 gross
Assembly with fixes seats
See Slide
See Slide
Concentrated (chairs only – not fixed)
7 net
7 net
Standing space
3 net
5 net
Unconcentrated (tables and chairs)
15 net
15 net
Use/Function of Space
Assembly without fixed seats
26
Schirmer Engineering Corporation
Gross Floor Area
The floor area within the inside perimeter of
the exterior walls of the building exclusive
of vents shafts and interior courts . . .
(2006 IBC)
27
Schirmer Engineering Corporation
Net Floor Area
The actual occupied area not including
unoccupied accessory areas such as
corridors, stairways, toilet rooms,
mechanical rooms and closets.
(2006 IBC)
28
Schirmer Engineering Corporation
Occupant Load Factors
NFPA
ICC
2006 LSC
IBC 2006
Table 7.3.1.2
T-1004.1.1
ft2 /occupant
ft2 /occupant
7 net
7 net
100 gross
100 gross
NR
40 net
200 gross
50 gross
Classroom area
20 net
20 net
Shop and other vocational room
areas (e.g., dormitories)
50 net
50 net
Use/Function of Space
Bowling centers, 5 persons/lane including
15 feet of runway
Business (e.g., offices)
Courtrooms – other than fixed seating areas
Dormitories
Educational
29
Schirmer Engineering Corporation
STORE
ROOM
(3,000SF)
BUSINESS
OFFICE
CONFERENCE
ROOM
(3,000SF)
AREA =
30,074SF
30
Schirmer Engineering Corporation
31
Schirmer Engineering Corporation
32
Schirmer Engineering Corporation
Egress –
Minimum Number of Exits
LSC
ICC
NFPA 101-2006
IBC 2006
Section 7.4.1.2
Table 1019.1
500 or less
2
2
501 – 1,000
3
3
Over 1,000
4
4
Occupant Load
per Story
33
Schirmer Engineering Corporation
Effect of Partitions on Exit Count
Fig. 1004.1.1 again to explain number of exits if
partitioned.
.
(2006 IBC)
34
Schirmer Engineering Corporation
35
Schirmer Engineering Corporation
Minimum Exit Widths
Stairs & Corridors – 44 inches
Doors – Clear width of 32 inches
There are exceptions for each.
(2006 IBC)
36
Schirmer Engineering Corporation
Minimum Exit Width for Stair
Fig. 1009.4(1) – min. exit width of stair
.START……………
(2006 IBC)
37
Schirmer Engineering Corporation
Measuring Door Clear Width
Fig. 1008.1.1(2) – min. exit width of door and
clear width
Start…..
(2006 IBC)
38
Schirmer Engineering Corporation
Minimum Corridor Width
Fig. 1005.2 regarding corridor widths
.
(2006 IBC)
39
Schirmer Engineering Corporation
Determining Exit Capacity
40
Schirmer Engineering Corporation
Vertical Exits
41

Capacity is based on largest occupant
count on one floor served by the stair; not
cumulative.

Exception: when 2 or more floors
converge into the stairwell.

Width cannot decrease in the direction of
exit.
Schirmer Engineering Corporation
Convergent Occupants in Stairwell
Fig. 1004.5(2) To illustrate previous text slide.
.
(2006 IBC)
42
Schirmer Engineering Corporation
Egress –
Exit Access Travel Distance
Exits shall be so located that the maximum
length of exit access travel, measured
from the most remote point to the
entrance to an exit along the natural and
unobstructed path of egress travel . . .
(2006 IBC)
43
Schirmer Engineering Corporation
Egress –
Exit Access Travel Distances
LSC
ICC
NFPA 101-2006
IBC 2006
Table A.7.6.1
Table 1016.1
Use Group
Without
sprinkler
44
With
sprinkler
Without
sprinkler
With
sprinkler
feet
feet
feet
feet
A
150
200
200
250
B
200
300
200
300
E
150
200
200
250
F-1
200
250
200
250
F-2
300
400
300
400
Schirmer Engineering Corporation
Egress –
Buildings with One Exit (1 story)
Use Group
45
Maximum
number of stories
above grade
NFPA
NFPA 101-2006
ICC
IBC 2006
Section 7.4.1.1 and
occupancy chapters
Section 1019.2
occupants / feet of travel
occupants / feet of travel
A
1 Story
Two exits required
49 / 75
B
1 Story
100 / 100
49 / 75
E
1 Story
Two exits required
49 / 75
F
1 Story
NR / 50
49 / 75
H-2
1 Story
Two exits required
3 / 25
H-3
1 Story
Two exits required
3 / 25
H-4
1 Story
Two exits required
10 / 75
I
1 Story
Two exits required
10 /75
M
1 Story
NR / 75
49 / 75
R
1 Story
NR / NR
10 / 75
S
1 Story
See occupancy Chpt
30 / 75
Schirmer Engineering Corporation
Egress –
Buildings with One Exit (2 story)
Use Group
46
Maximum
number of stories
above grade
NFPA
NFPA 101-2006
ICC
IBC 2006
Section 7.4.1.1 and
occupancy chapters
Section 1019.2
occupants / feet of travel
occupants / feet of travel
B
2 Stories
Two exits required
49 / 75
F
2 Stories
Two exits required
49 / 75
M
2 Stories
NR / 50
49 / 75
S
2 Stories
See occupancy Chpt
29 / 100
U
2 Stories
Two exits required
49 / 75
R-2
2 Stories
4 dwelling units
50 feet
Schirmer Engineering Corporation
47
Schirmer Engineering Corporation
Egress –
Common Path of Travel
The distance measured from the most
remote point in a space to the point in the
exit path where the occupant has access
to two required exits in separate
directions.
(2006 IBC Commentary)
48
Schirmer Engineering Corporation
Egress –
Common Path of Egress Travel
Use Group
49
LSC
ICC
NFPA 101-2006
IBC 2006
Table A.7.6
Section 1014.3
W/out sprinkler
With sprinkler
W/out sprinkler
With sprinkler
feet
feet
feet
Feet
A
20/75
20/75
75
75
B
75
100
75
100
E
75
100
75
75
F
50
50
75
100
I-1
75
100
75
75
I-2
NR
NR
75
75
I-3
50
100
100
100
M
75
100
75
75
R-1/R-2
35
50
75
75/125
S-1
50
100
75
100
S-2
NR
NR
75
100
Schirmer Engineering Corporation
EXIT
EXIT
50' MAX
<_ 100'
75' MAX
50
Schirmer Engineering Corporation
Dead End Distance
Where more than one exit or exit access
doorway is required, the exit access shall
be arranged such that there are no dead
end corridors greater than 20 feet in
length.
(2006 IBC)
51
Schirmer Engineering Corporation
EXIT
EXIT
"X"
52
Schirmer Engineering Corporation
Egress –
Dead End Corridors/Passageways
Use Group
53
LSC
ICC
NFPA 101-2006 (Table A.7.6)
IBC 2006 (Section 1017.3)
Without sprinkler
With sprinkler
Without sprinkler
With sprinkler
feet
feet
feet
Feet
A
20
20
20
20
B
20
50
20
50
E
20
50
20
20
F
50
50
20
50
H
0
0
20
20
I-1
20
50
20
20
I-2
30
30
20
20
I-3
50
50
20
50
M
20
50
20
20
R-1/R-2
35
50
20
20
S-1
50
100
20
20
S-2
NR
NR
20
Schirmer
Engineering 20
Corporation
Other Items for Egress Review





54
Fire Resistance of Egress Components (exit
access corridors, passageways, etc.)
Opening Protectives (doors, throughpenetrations, fire and smoke dampers, etc.)
Signage and Emergency Lighting
Accessibility (areas of refuge, ramps, etc.)
Remoteness of Exits
Schirmer Engineering Corporation
Egress –
Corridor Fire Resistance Ratings
Use Group
55
LSC
ICC
NFPA 101-2006
IBC 2006
Section 7.1.3.1 & occupancy
Chapters
Section 1017.1
W/out sprinkler
With sprinkler
W/out sprinkler
With sprinkler
hours
hours
hours
hours
A, B, E & F
1
1
1
0
H
1
1
N/P
1
I-1
1
0
NP
1
I-2
1
0
NP
0
I-3
1
0
NP
1
M
1
0
1
0
R
1
1/2
N/P
1
S&U
1
0
1
0
Schirmer Engineering Corporation
Additional Comparison of Egress –
IBC and NFPA 101, LSC
Handout material
Thank You
56
Schirmer Engineering Corporation
Author
Document
Category
Uncategorized
Views
0
File Size
605 KB
Tags
1/--pages
Report inappropriate content