Live Load On Permeable Roofing

Is 875 part ii 1987 specifies the live loads for following occupancy conditions.

Live load on permeable roofing.

Live load and snow load what is the difference and how do i know which one applies. The minimum live loads per square meter area for different types of structures are given in is 875 part 2 1987. However if the attic is intended for storage the attic live load or some portion should also be considered for the design of other elements in the load path. This issue of live load vs.

The codes cover single family homes. This downward imposed load on the home is also known as the snow load. There are two different rafter tables in the irc code book. Load limits on the roof of a building.

Roofs are under a lot of pressure. Irc provides the minimum codes standards for roof structures and other areas of construction used in most areas of the nation including georgia. Arch 331 note set 13 1 s2014abn 2. Live loads should be suitably calculated or assumed by the designer based on occupancy levels.

L live load l r live roof load w wind load s snow load e earthquake load r rainwater load or ice water load t effect of material temperature h hydraulic loads from soil f hydraulic loads from fluids. In order to stay intact and in place a roof must be able to resist loads both permanent and temporary that are pushing. Roof load live load design is affected by the shape of the roof whether it is flat curved or pitched. Calculating the load on a flat roof is a challenging task for the layperson that involves knowledge of building materials their weights and local building codes.

The north zone middle zone and the south zone are identified on the roof load zone map above. Roof loads are a downward vertical force on the home. Georgia residential roof building codes follow the same standards as established by the international residential codes irc. Victor staley a building official in the town of brewster mass responds.

Ground snow load might seem somewhat confusing until you read the basic premise that is identified in irc section r301 6 which states. Where uniform roof live loads are reduced to less than 20 psf 0 96 kn m 2 in accordance with section 1607 13 2 1 and are applied to the design of structural members arranged so as to create continuity the reduced roof live load shall be applied to adjacent spans or to alternate spans whichever produces the most unfavorable load effect see section 1607 13 2 for reductions in minimum roof.