Where Zone E or G falls on a roof overhang on the windward side of the building, use E OH and G OH for the pressure on the horizontal projection of the overhang. Vertical pressure zones - Net (sum of internal and external) pressures on horizontal projection of:ĩ. Horizontal pressure zones - Sum of the windward and leeward net (sum of internal and external) pressures on vertical projection of: The zone pressures represent the following: The total horizontal load shall not be less than that determined by assuming P S = 0 in Zones B and D.Ĩ. For roof slopes other than those shown, linear interpolation is permitted.ħ. Plus and minus signs signify pressures acting toward and away from the projected surfaces, respectively.Ħ. Load Case 2 at 25° is provided only for interpolation between 25° to 30°.ĥ. Load Cases 1 and 2 must be checked for 25° <θ ≤ 45°. For the design of the longitudinal MWFRS, use θ = 0°, and locate the Zone E/F, G/H boundary at the mid-length of the building.Ĥ. The load patterns shown shall be applied to each corner of the building in turn as the reference corner.ģ. Adjust to other exposures and heights with adjustment factor λ.Ģ. Pressures are applied to the horizontal and vertical projections for Exposure B, at h = 30 feet, for I = 1.0. For SI: 1 foot = 304.8 mm, 1 degree = 0.0 174 rad.įIGURE 1609.6.2.1 MAIN WINDFORCE LOADING DIAGRAM Notes:ġ.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |