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Wind Load Report

1. Site & Building Data

Roof Type: Gable  
Wind Speed (ult): 115 mph
Exposure Category: C  
Enclosure Class: Enclosed  
Building Width (W): 28 ft.
Building Length (L): 64 ft.
Eave Height (he): 10 ft.
Foundation Height (hf): 0 ft.
Roof Pitch: 4 /12
Eave Overhang (OHe): 1 ft.
Gable Overhang (OHg): 1 ft.

2. Parameters & Coefficients

Topographic Factor (Kzt): 1.0
Directionality Factor (Kd): .85
Roof Angle (θ): 18.43 deg.
Mean Roof Height (h): 12.33 ft.
Ridge Height (hr): 14.67 ft.
Pos. Internal Pressure (+GCpi): +0.18  
Neg. Internal Pressure (-GCpi): -0.18  
Velocity Pressure Exp. Coeff. (Kh): 0.85 @ z=h
Velocity Pressure (qh): 24.43 psf
End Zone Width (a): 3.00 ft.
Zone 2/2E Dist.: 14.00 ft.

3. Design Assumptions and Notes

Code Standard: ASCE 7-10
Geometry: Regular-Shaped Bldg.
Height Class: Low-Rise Building
Notes:

4. Design Loads

Top Chord Dead Load: 12 psf
Bottom Chord Dead Load: 10 psf
Truss/Rafter Spacing: 24 in. o/c

4. Design Wind Pressures: MWFRS Envelope Procedure


Load Case A: Transverse Direction
Surface GCpf Design Pressure (psf)
(w/ +GCpi) (w/ -GCpi)
1 0.52 8.22 17.01
2 -0.69 -21.25 -12.46
3 -0.47 -15.84 -7.05
4 -0.42 -14.54 -5.75
1E 0.78 14.66 23.46
2E -1.07 -30.54 -21.74
3E -0.67 -20.85 -12.05
4E -0.62 -19.50 -10.70
2OH -0.69 -16.86
2EOH -1.07 -26.14
3OH -0.47 -11.45
3EOH -0.67 -16.45
2OH+W -0.69/-0.7 -33.96
2EOH+W -1.07/-0.7 -43.24
a) (+) and (-) signs signify wind pressures acting toward & away from surfaces.
b) External Pressure Coefficients linearly interpolated from Fig. 28.4-1 ASCE 7-10.
c) Design building for all wind directions, 4 load patterns per load case.
d) Total horizontal shear shall not be less than that by neglecting roof wind forces.
e) Min. wind load for enclosed or partially enclosed bldg.: 16 psf wall, 8 psf roof.
f) Design pressures are for strength design, multiply by 0.6 for ASD.
Wind Loads HOP KILN
MALIK REHMAN REHMAN CONSULTING ENGINEERS
7936 EL RENO AVE, ELVERTA, CA 95626
ph. 9164064264    www.website.com 		-
7/4/2024 1
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Load Case B: Longitudinal Direction
Surface GCpf Design Pressure (psf)
(w/ +GCpi) (w/ -GCpi)
1 -0.45 -15.39 -6.60
2 -0.69 -21.25 -12.46
3 -0.37 -13.44 -4.64
4 -0.45 -15.39 -6.60
5 0.40 5.37 14.17
6 -0.29 -11.48 -2.69
1E -0.48 -16.12 -7.33
2E -1.07 -30.54 -21.74
3E -0.53 -17.34 -8.55
4E -0.48 -16.12 -7.33
5E 0.61 10.50 19.30
6E -0.43 -14.90 -6.11
2OH -0.69 -16.86
2EOH -1.07 -26.14
3OH -0.37 -9.04
3EOH -0.53 -12.95
2EOH+W -1.07/-0.7 -43.24
3EOH+W -0.53/-0.7 -30.05
a) (+) and (-) signs signify wind pressures acting toward & away from surfaces.
b) External Pressure Coefficients linearly interpolated from Fig. 28.4-1 ASCE 7-10.
c) Design building for all wind directions, 4 load patterns per load case.
d) Total horizontal shear shall not be less than that by neglecting roof wind forces.
e) Min. wind load for enclosed or partially enclosed bldg.: 16 psf wall, 8 psf roof.
f) Design pressures are for strength design, multiply by 0.6 for ASD.


Torsional Load Cases
Surface Load Case GCpf Design Pressure (psf)
(w/ +GCpi) (w/ -GCpi)
1T A - 2.05 4.25
2T A - -5.31 -3.11
3T A - -3.96 -1.76
4T A - -3.64 -1.44
5T B - 1.34 3.54
6T B - -2.87 -0.67
a) (+) and (-) signs signify wind pressures acting toward & away from surfaces.
b) Pressures designated with a "T" are 25% of full design wind pressures.
c) Torsional loading shall apply to all 8 load patterns using the figures shown.
d) Design pressures are for strength design, multiply by 0.6 for ASD.
e) Torsional Design Exceptions: One story bldg. with h ≤ 30 ft,
   Two stories or less framed with light frame construction,
   Two stories or less with flexible diaphragms.
Wind Loads HOP KILN
MALIK REHMAN REHMAN CONSULTING ENGINEERS
7936 EL RENO AVE, ELVERTA, CA 95626
ph. 9164064264    www.website.com 		-
7/4/2024 2
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5. Wind Load Calculations


1.) Lateral Loads - Transverse Direction:


Lateral Loads on Roof Diaphragm with Positive Internal Pressure
64 ft.
6.00 ft.
58.00 ft.
58.5 plf
43.6 plf
44.0 plf
24.7 plf
1646 lbs
1543 lbs
58.4 plf
44.4 plf
85.5 plf
59.5 plf
73.2 plf
47.2 plf
8.6 plf
6.8 plf
46.1 plf
32.0 plf
3.3 plf
2.3 plf
1 ft.
1 ft.
a) (-) signs signify wind lateral forces acting opposite to the direction of the arrows shown.
b) Strength design values multiplied by 0.6 to obtain ASD values.



Wind Base Shear (ASD)
Load Case A: Transverse Direction
Load Case Walls (lbs) Roof (lbs) Roof Overhangs (lbs) Total Lateral Load (lbs) R1 (lbs) R2 (lbs)
Positive Internal Pressure 4576 -1041 -345 3189 1646 1543
Negative Internal Pressure 4576 -1041 -345 3189 1646 1543
Roof Pressure = 0 4576 0 0 4576 2381 2195
Min. Pressures (8 psf, 16 psf) 3072 1434 150 4656 2328 2328
a) Bottom half of wall neglected in tributary area calculations.
b) Strength design values multiplied by 0.6 to obtain ASD values.
Wind Loads HOP KILN
MALIK REHMAN REHMAN CONSULTING ENGINEERS
7936 EL RENO AVE, ELVERTA, CA 95626
ph. 9164064264    www.website.com 		-
7/4/2024 3
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2.) Lateral Loads - Longitudinal Direction:


Lateral Loads on Roof Diaphragm with Positive Internal Pressure
28 ft.
3.00 ft.
25.00 ft.
44.7 plf
34.4 plf
31.5 plf
16.1 plf
22.9 lbs
111.2 lbs
204.0 lbs
330.4 lbs
1118 lbs
1043 lbs
a) (-) signs signify wind lateral forces acting opposite to the direction of the arrows shown.
b) Strength design values multiplied by 0.6 to obtain ASD values.
c) Where the length of building (L) exceeds 4X the mean roof height (h), wind drag forces should additionally be considered.



Wind Base Shear (ASD)
Load Case B: Longitudinal Direction
Load Case Walls (lbs) Gable Ends (lbs) Roof (lbs) Total Lateral Load (lbs) RA (lbs) RB (lbs)
Positive Internal Pressure 1493 668 0 2161 1118 1043
Negative Internal Pressure 1493 668 0 2161 1118 1043
Roof Pressure = 0 1493 668 0 2161 1118 1043
Min. Pressures (8 psf, 16 psf) 1344 627 0 1971 986 986
a) Bottom half of wall neglected in tributary area calculations.
b) Strength design values multiplied by 0.6 to obtain ASD values.
Wind Loads HOP KILN
MALIK REHMAN REHMAN CONSULTING ENGINEERS
7936 EL RENO AVE, ELVERTA, CA 95626
ph. 9164064264    www.website.com 		-
7/4/2024 4
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3.) Roof Truss Reactions:


Roof Truss/Rafter Reactions: Transverse End Zone
129 lbs
14 lbs
Max. Horz. ① = 79 lbs
Max. Uplift ① = 129 lbs
a) Strength design values multiplied by 0.6 to obtain ASD values.
b) Windward loads may be positive or negative depending on pitch of roof.



Roof Truss/Rafter Reactions (ASD)
w/ Positive Internal Pressure
Load Case Horizontal Load (lbs) Gross Uplift (lbs) Net Uplift (lbs) U1 (lbs) U2 (lbs)
Transverse Int. Zone 39 678 -114 -20 -94
Transverse End Zone 65 935 143 129 14
Longitudinal Int. Zone 47 614 -178 -51 -126
Longitudinal End Zone 79 851 60 94 -34
a) Gross Uplift calculations do not include any counteracting roof dead loads.
b) Net Uplift calculations include counteracting roof dead loads multiplied by 0.6 per load case (7) ASCE 7-10.
c) Strength design values multiplied by 0.6 to obtain ASD values for wind loads.
d) Loads based on truss spacing calculated at 24" o/c.
e) Negative values for horizontal load indicate load acting in windward direction (tranverse load cases).
f) Negative values for uplift indicate net downward force (zero uplift).













*Disclaimer: The calculations produced herein are for initial design and estimating purposes only. The calculations and drawings presented do not constitute a fully engineered design. All of the potential load cases required to fully design an actual structure may not be provided by this calculator. For the design of an actual structure, a registered and licensed professional should be consulted as per IRC 2012 Sec. R802.10.2 and designed according to the minimum requirements of ASCE 7-10. The wind load calculations provided by this online tool are for educational and illustrative purposes only. Medeek Design assumes no liability or loss for any designs presented and does not guarantee fitness for use.
Wind Loads HOP KILN
MALIK REHMAN REHMAN CONSULTING ENGINEERS
7936 EL RENO AVE, ELVERTA, CA 95626
ph. 9164064264    www.website.com 		-
7/4/2024 5