05 - Laserfiche WebLink

k. In accordance with Section R301.2.1.5, where there is local historical data documenting structural damage to buildings due to topographic wind speed -up effects, the jurisdiction shall till in this part of the table with "YES." Otherwise, the jurisdiction shall indicate' NO" in this part of the table. 20.10.050 CRC Table R301.5 amended — Minimum Uniformly Distributed Live Loads Table R301.5 is amended to read as follows: TABLE R301.5 MINIMUM UNIFORMLY DISTRIBUTED LIVE LOADS (in pounds per square toot) USE LIVE LOAD Attics without storage 10 Attics with limited storage s 20 Habitable attics and attics served 30 with fixed stairs Balconies (exterior) and deckse 60 Fire esca es 40 Guardrails and handrails' 200h Guardrail in -fill components 50h Passen • er vehicle • aragesa 50a Rooms other than sleeping room 40 Sleeiin: rooms 30 Stairs 40E For SI: 1 pound per square foot = 0.0479 kPa, I square inch = 645 mmz I pound = 4.45 N. a Elevated garage floors shall be capable of supporting a 2,000 -pound load applied over a 20- square -inch area. b. Attics without storage are those where the maximum clear height between joist and rafter is less than 42 inches, or where there are not 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. For attics without storage, this live load need not be assumed to act concurrently with any other live load requirements. 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. Decks That are not exterior balconies may be designed al 40 psi See Section R502.2.2 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 I square foot. This load need not be assumed to act concurrently with any other live load requirement. g. For attics with limited storage and constructed with trusses, this live load need be applied only 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 or greater 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. 1. The attic area is accessible by a pull -dawn stairway or framed in accordance with Section R807.1. 2. The truss has a bottom chord pitch less than 2:12. 3- Required insulation depth is Icss than the bottom chord member depth. The bottom chords of trusses meeting the above criteria for limited storage shall be designed for the greater of the actual imposed dead load or 10 psf, uniformly distributed over the entire span. h. Glazing used in handrail assemblies and guards shall he designed with a safety factor of 4 The safety factor shall be applied to each of the concentrated loads applied to the top of the rail, and to the load on the in -fill components. These Toads shall be determined independent of one another, and loads are assumed not to occur w th any other live load. 43