WIND LOADING ANALYSIS - Main
Wind-Force Resisting System
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Per ASCE 7-98 Code for Low-Rise Buildings with h <=
30' and Roof q < 10o
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Using Method 1: Simplified Procedure (Section 6.4)
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Input Data:
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Wind Speed, V =
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mph?? (Wind
Map, Fig. 6-1)
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Bldg.
Classification =
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(Table 1-1)
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Exposure Category =
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(Sect. 6.5.6) (Do not use Exp. "A")
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Ridge Height, hr =
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ft. (hr >= he)
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Eave Height, he =
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ft. (he <= hr)
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Building Width =
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ft. (Normal to Building Ridge)
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Building Length =
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ft. (Parallel to Building Ridge)
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Roof Type =
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(Gable or Monoslope)
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Enclosed? (Y/N)
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(Sect. 6.2 & Table 6-7)
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MWFRS Trib. Area =
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ft.^2
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Roof C&C Name =
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(Purlin, Joist, Decking, or Fastener)
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Roof C&C Area =
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ft.^2 (for Component/Cladding)
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Wall C&C Name =
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(Girt, Siding, Wall, or Fastener)
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Wall C&C Area =
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ft.^2 (for Component/Cladding)
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Resulting Parameters and Net Design Pressures:
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Roof Angle, q =
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deg.
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Mean Roof?? Ht., h =
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MWFRS Net Pressures
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Design MWFRS
Load
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Location
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p (psf)
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SP (kips)
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SP (kips)
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Roof
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(Width)
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(Length)
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Walls
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Components & Cladding Net Pressures
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Location
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Zone
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+p (psf)
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-p (psf)
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1
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2
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3
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4
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5
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Notes:
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1. Design wind pressures are net pressures (sum of
external and internal pressures).
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2. Wall net pressure for MWFRS is total for both
windward and leeward walls.
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3. (+) and (-) signs
signify wind pressures acting toward & away from respective surfaces.
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4. Net pressures taken
from Tables 6-2, 6-3A and 6-3B and include the following "multipliers":
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Exposure Factor =
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Area Reduction Factor =
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Importance Factor, I =
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5. Wall & Roof
End Zone Widths for Components & Cladding: a =
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ft.
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6. Minimum
wind load for MWFRS and C&C shall not be less than 10 psf.
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7. References: a. ASCE 7-98, "Minimum Design
Loads for Buildings and Other Structures".
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???????????? b.
"Guide to the Use of the Wind Load Provisions of ASCE 7-98"
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?????????????????????? by: Kishor C. Mehta and Dale C.
Perry (2002).
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