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Unformatted text preview: Chapter 4 LIVE LOADS 4.1 DEFINITIONS BALCONY (EXTERIOR): An exterior floor projecting from and supported by a structure without additional independent sup- ports. DECK: An exterior floor supported on at least two opposing sides by an adjacent structure and/or posts, piers, or other inde- pendent supports. FIXED LADDER: A ladder that is permanently attached to a structure, building, or equipment. GRABBARSYSTEM: A bar provided to support body weight in locations such as toilets, showers, and tub enclosures. GUARDRAIL SYSTEM: A system of building components near open sides of an elevated surface for the purpose of minimiz- ing the possibility of a fall from the elevated surface by people, equipment, or material. HANDRAIL: A rail grasped by hand for guidance and sup- port. A handrail assembly includes the handrail, supporting at- tachments, and structures. LIVE LOAD: A load produced by the use and occupancy of the building or other structure that does not include construction or environmental loads, such as wind load, snow load, rain load, earthquake load, flood load, or dead load. ROOF LIVE LOAD: A load on a roof produced (1) during maintenance by workers, equipment, and materials and (2) during the life of the structure by movable objects, such as planters or other similar small decorative appurtenances that are not occu- pancy related. VEHICLE BARRIER SYSTEM: A system of building com- ponents near open sides of a garage floor or ramp, or building walls that act as restraints for vehicles. 4.2 UNIFORMLY DISTRIBUTED LOADS 4.2.1 Required Live Loads. The live loads used in the design of buildings and other structures shall be the maximum loads expected by the intended use or occupancy, but shall in no case be less than the minimum uniformly distributed unit loads required by Table 4-1. 4.2.2 ProvisionforPartitions. In office buildings or other build- ings where partitions will be erected or rearranged, provision for partition weight shall be made, whether or not partitions are shown on the plans. Partition load shall not be less than 15 psf. EXCEPTION: A partition live load is not required where the minimum specified live load exceeds 80 psf (3.83 kN/m 2 ). 4.3 CONCENTRATED LOADS Floors, roofs, and other similar surfaces shall be designed to support safely the uniformly distributed live loads prescribed in Section 4.2 or the concentrated load, in pounds or kilonewtons (kN), given in Table 4-1, whichever produces the greater load effects. Unless otherwise specified, the indicated concentration shall be assumed to be uniformly distributed over an area 2.5 ft (762 mm) square [6.25 ft 2 (0.58 m 2 )] and shall be located so as to produce the maximum load effects in the structural members....
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- Fall '08