Table 1607.1
Minimum Uniformly Distributed Live Loads and Minimum Concentrated Live Loadsg
(Partial Table)
Occupancy or Use | Uniform (psf) | Concentrated (lbs.) |
25. Residential | ||
Uninhabitable attics without storagei | 5 | |
Uninhabitable attics with storagei, j, k | 20 | |
Habitable attics | 40 | -- |
Hotels and Group R-2 | ||
Private rooms and corridors serving them | 40 | |
Public rooms and corridors serving them | 100 |
j. For attics with storage and constructed with trusses, this live load need only be applied to those portions of the bottom chord where there are two or more adjacent trusses with the same web configuration capable of containing a rectangle 42 inches high by 2 feet wide or greater, located within the plane of the truss. The rectangle shall fit between the top of the bottom chord and the bottom of any other truss member, provided that each of the following criteria is met:
i. The attic area is accessible by a pull-down stairway or framed opening in accordance with IBC section 1209.2, and
ii. The truss shall have a bottom chord pitch less than 2:12.
iii. Bottom chords of trusses shall be designed for the greater of actual imposed dead load or 10 psf, uniformly distributed over the entire span.
Wis. Admin. Code Department of Safety and Professional Services SPS 362.1607