Page 180 - Structural Steel Designers Handbook AISC, AASHTO, AISI, ASTM, and ASCE-07 Design Standards

Brockenbrough_Ch04.qxd 9/29/05 5:09 PM Page 4.8

BUILDING CODES, LOADS, AND FIRE PROTECTION*

4.8 CHAPTER FOUR

TABLE 4.3 Minimum Uniformly Distributed Live Loads, L o , and Minimum Concentrated Live Loads
2
2
Occupancy or use Uniform lb/ft (kN/m ) Conc. lb (kN)
Apartments (see residential)
Access floor systems
Office use 50 (2.4) 2000 (8.9)
Computer use 100 (4.79) 2000 (8.9)
Armories and drill rooms 150 (7.18)
Assembly areas and theaters
Fixed seats (fastened to floor) 60 (2.87)
Lobbies 100 (4.79)
Movable seats 100 (4.79)
Platforms (assembly) 100 (4.79)
Stage floors 150 (7.18)
Balconies (exterior) 100 (4.79)
On one- and two-family residences only, and not exceeding 60 (2.87)
2
2
100 ft (9.3 m )
Bowling alleys, poolrooms, and similar recreational areas 75 (3.59)
Catwalks for maintenance access 40 (1.92) 300 (1.33)
Corridors
First floor 100 (4.79)
Other floors, same as occupancy served except as indicated
Dance halls and ballrooms 100 (4.79)
Decks (patio and roof)
Same as area served, or for the type of occupancy accommodated
Dining rooms and restaurants 100 (4.79)
Dwelling (see residential)
2
2
Elevator machine room grating [on area of 4 in (2580 mm )] 300 (1.33)
2
2
Finish light floor plate construction [on area of 1 in (645 mm )] 200 (0.89)
Fire escapes 100 (4.79)
On single-family dwellings only 40 (1.92)
Fixed ladders See Sec. 4.4
Garages (passenger vehicles only) 40 (1.92) Note (1)
Trucks and buses Note (2)
Grandstands (see stadium and arena bleachers)
Gymnasiums, main floors, and balconies 100 (4.79) [Note (4)]
Handrails, guardrails, and grab bars See Sec. 4.4
Hospitals
Operating rooms, laboratories 60 (2.87) 1000 (4.45)
Private rooms 40 (1.92) 1000 (4.45)
Wards 40 (1.92) 1000 (4.45)
Corridors above first floor 80 (3.83) 1000 (4.45)
Hotels (see residential)
Libraries
Reading rooms 60 (2.87) 1000 (4.45)
Stack rooms 150 (7.18) [Note (3)] 1000 (4.45)
Corridors above first floor 80 (3.83) 1000 (4.45)
Manufacturing
Light 125 (6.00) 2000 (8.90)
Heavy 250 (11.97) 3000 (13.40)
Marquees and canopies 75 (3.59)
Office buildings
File and computer rooms shall be designed for heavier loads
based on anticipated occupancy
Lobbies and first floor corridors 100 (4.79) 2000 (8.90)
Offices 50 (2.40) 2000 (8.90)
Corridors above first floor 80 (3.83) 2000 (8.90)
(Continued)

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