UFC 3-310-01
25 May 2005
Notes to Table B-1, "MINIMUM UNIFORMLY DISTRIBUTED LIVE LOADS AND
MINIMUM CONCENTRATED LIVE LOADS"
For SI: 1 square inch = 645.16 mm2, 1 pound per square foot = 0.0479 kN/m2 = 0.0479
kPa, 1 pound = 0.004448 kN, 1 pound per cubic foot = 16 kg/m3.
a. Floors in garages or portions of building used for the storage of motor vehicles shall
be designed for the uniformly distributed live loads shown or the following
concentrated loads: (1) for passenger cars accommodating not more than nine
passengers, 13.34 kN (3,000 pounds) acting on an area of 114 mm x 114 mm (4.5
inches x 4.5 inches); (2) for mechanical parking structures without slab or deck
which are used for storing passenger vehicles only, 10.0 kN (2,250 pounds) per
wheel.
b. The loading applies to stack room floors that support non-mobile, double-faced
library book stacks, subject to the following limitations:
1) The nominal book stack unit height shall not exceed 2,290mm (90 inches).
2) The nominal shelf depth shall not exceed 305mm (12 inches) for each face; and
3) Parallel rows of double-faced book stacks shall be separated by aisles not less
than 915 mm (36 inches) wide.
c. Design in accordance with the ICC Standard on Bleachers, Folding and Telescoping
Seating and Grandstands.
d. Other uniform loads in accordance with an approved method which contains
provisions for truck loadings shall also be considered where appropriate.
e. The concentrated wheel load shall be applied on an area of 12,900 mm2 (20 square
inches).
f. Minimum concentrated load on stair treads (on area of 2,600 mm2 (4 square inches))
is 1.3 kN (300 pounds).
g. Where snow loads occur that are in excess of the design conditions, the structure
shall be designed to support the loads due to the increased loads caused by drift
buildup or a greater snow design determined by the building official. (See IBC
Section 1608). For special-purpose roofs, see IBC Section 1607.11.2.2.
h. See IBC Section 1604.8.3 for decks attached to exterior walls.
B-5
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