CODES, ADA Flashcards
determine occupancy IBC chapter
Chapter 3: Use and Occupancy Classification
Mixed Occupancies IBC chapter and separation
chapter 508 must be separated by a fire barrier (1-4h), When unseparated, more stringent occupancy applies.
accessory occupancy size and separation
f.e. gift shop in hospital. can not exceed 10% of floor areas story its located in. (less than a 100 sf for storage) no fire separation needed (unless group H, I1, R1-3 dwelling and sleeping units need to separated with fire partitions).
Incidental use, size and separation
F.e. mech rooms. Ancillary to main occupancy with higher risk level. Can’t exceed 10% of story must be sprinklered and fire separated.
identify threshold and fire areas IBC chapter
Table 601 and 602 in the IBC
Fire suppression system are depending on? (3)
Fire area of building
Where occupancy is located in building
Number of occupants
Fire partition
Wall assembly with 1h rating. Must provide continuous barrier. From floor to underside of structure, or to rated ceiling. Openings in fire partitions must have 45min minimum rating, except corridors 20min.
Fire barrier
Vertical or horizontal assembly, that is fire-resistance rated, designed to restrict the spread of fire and smoke, and afford safe passage for protected egress. Continuous from floor to slab. Used to separate occupancies, enclose vertical exits and passageways. Rating greater than 1 hour, openings 45minto 3h, depending on barrier itself. Openings 25% of walll max, not to exceed 156 ft2.
Fire wall
rated wall that separates structure into separate construction. 2-4h ratings, extend continuously from foundation through the roof.
Smoke barrier
continuous vertical or horizontal membrane with min fire resistance of 1 h, designed to restrict the movement of smoke. Openings in smoke barriers min 20min rating. Shaft enclosures shall have a fire-resistance rating of not less than 2 hours where connecting four stories or more, and not less than 1 hour where connecting less than four stories.
Smoke partitions
Smoke partitions do not require a rating, and serve to limit the transfer of smoke through a wall spanning from floor to underside of structure above.
Increase of Frontage, IBC Chapter and Formula
506.3 Frontage Increase up to 75%. min distance to trigger increase 20’, w/30
If = [F / P – 0.25] W / 30
NFPA 13
National Fire Protection Association) is the standard for the installation of sprinkler systems. It is a building standard for fire sprinkler requirements.
NFPA 101
(National Fire Protection Association) is a life safety code that serves as a basis for egress provisions.
NFPA-70
(National Fire Protection Association) is the National Electrical Code (NEC), and is used to govern the life safety issues of all major electrical systems.
Means of Egress Sizing
For stairs calculated by multiplying the occupant load by capacity factor of 0.3 inch per occupant. 0.2 if sprinklered.
Means of Egress other than stairways widths are calculated by multiplying the occupant load by capacity factor of 0.2 inch per occupant. 0.15 if Sprinklers
Sprinklers can lengthen and occupancy can shorten the required max.
minimum width of each door opening, height of door
clear width of 32”, height not be less than 80 inches
what affects the number of exits required:
The common path of travel is the distance any building occupant must travel before reaching access to two exits.
If the common path of travel is exceeded, an additional exit must be provided .
The travel distance for an occupant in the most remote part of a building to an exit is governed by building codes.
Occupant load is a factor in determining the number of exits.
Minimum Corridor Width, more than 50 occupants, for most occupancies
44”
Mezzanine IBC Chapter
Section 505.2
ICC A117.1
Accessible and Usable Buildings and Facilities
Accessible Routes, ADA section
Section 206, At least one accessible route shall be provided within the site from accessible parking spaces and accessible passenger loading zones; public streets and sidewalks; and public transportation stops to the accessible building or facility entrance they serve.
wheelchair space, and turning space
30” x 48”
60” diameter
ADA RAMP Clear Width
A ramp run must be at least 36 inches wide between the ramp’s handrails.
ADA RAMP Rise
A maximum of 30 inches per run, with no limit on the number of runs.
ADA RAMP Running Slope, cross slope, landing size
1:12 MAXIMUM SLOPE
CROSS SLOPE: 1:48.
LANDING CLEAR LENGHT: 60”.
ADA door - front approach, pull side
60” clear infront, 18” clear on pull side
ADA door - front approach, push side
48” clear
ADA door - in-between 2 opposite door leaves, or swing and corridor wall
48” clear
Fire lanes
Fire lanes must be at least 20’ wide, at least 10’ away from building overhang to allow overhead clearance for ladders, if the fire lane has a turn the outside turning radius must be at least 54’ and the inside turning radius must be at least 30’ and it must be able to carry at least 35 tons.
one exit
occupancies of 49 people or less
2 exits
Occupancies of 50 or more require two exits. If an occupancy requires two exits, the two exits must be spaced at least one half of the longest diagonal dimension of the space away from each other.