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R301.5 Live load.
The minimum uniformly distributed live load shall be as provided in Table R301.5.
TABLE R301.5 MINIMUM UNIFORMLY DISTRIBUTED LIVE LOADS
USE
LIVE LOAD
Attics with storageb
20
Attics without storageb
10
Deckse
40
Exterior balconies
60
Fire escapes
40
Guardrails and handrailsd
200
Guardrails in–fill componentsf
50
Passenger vehicle garagesa
50a
Rooms other than sleeping rooms
40
Sleeping rooms
30
Stairs
40c
For SI: 1 pound per square foot = 0.0479 kN/m2, 1 square inch = 654mm2, 1 pound = 4.45N.
a. Elevated garage floors shall be capable of supporting a 2,000-pound load applied over a 20-square-inch area.
b. No storage with roof slope not over 3 units in 12 units.
c. Individual stair treads shall be designed for the uniformly distributed live load or a 300-pound concentrated load acting over an area of 4 square inches, whichever produces the greater stresses.
d. A single concentrated load applied in any direction at any point along the top.
e. See Section R502.2.1 for decks attached to exterior walls.
f. Guard in-fill components (all those except the handrail), balusters and panel fillers shall be designed to withstand a horizontally applied normal load of 50 pounds on an area equal to 1square foot. This load need not be assumed to act concurrently with any other live load requirement.
