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Abstract
Wind loads create structural demands on a building's exterior surfaces in all three direction (into/out of the wall surface, racking in the plane of the wall, and uplift). However, the ablity of the wall to resist wind pressure acting against it is equally important. Not all combinations of gypsum board, sheathing and siding materials can resist the entire range of wind pressures acting against them as covered by the International Building Code (IBC). This is especially true of the suction pressures that exist on the leeward side of the structure during a wind event. These suction forces tend to try to pull off the wall cladding and are often greater than the possitive pressures acting against on the windward wall. These required design wind pressures on exterior walls can be quite hight and can even exceed common floor (40 psf) or roof (30 psf) design pressures. In this paper the derivation of Table 2304.6.1 present in the 2007 Supplement to the IBC is discussed. This table uses wood structural panel sheathing to resist the required designwind pressures and replaces the existing legacy table in the IBC.
Wind loads create structural demands on a building's exterior surfaces in all three direction (into/out of the wall surface, racking in the plane of the wall, and uplift). However, the ablity of the wall to resist wind pressure acting against it is equally important. Not all combinations of gypsum board, sheathing and siding materials can resist the entire range of wind pressures acting against them as covered by the International Building Code (IBC). This is especially true of the suction pressures that exist on the leeward side of the structure during a wind event. These suction forces tend to try to pull off the wall cladding and are often greater than the possitive pressures acting against on the windward wall. These required design wind pressures on exterior walls can be quite hight and can even exceed common floor (40 psf) or roof (30 psf) design pressures. In this paper the derivation of Table 2304.6.1 present in the 2007 Supplement to the IBC is discussed. This table uses wood structural panel sheathing to resist the required designwind pressures and replaces the existing legacy table in the IBC.
Date
10/2008
10/2008
Author(s)
Zeno Martin; Ed Keith
Zeno Martin; Ed Keith
Page(s)
9
9
Source
APA (American Plywood Assn.)
APA (American Plywood Assn.)
Keyword(s)
wind pressure; design load; wood sheathing; APA; engineered wood; wind uplift
wind pressure; design load; wood sheathing; APA; engineered wood; wind uplift