Subject
Customer
Location
Job No.
Engr.
Rev.
Date
Page

Wind Load Report

1. Site & Building Data

Roof Type: Gable  
Wind Speed (ult): 135 mph
Exposure Category: C  
Enclosure Class: Enclosed  
Building Width (W): 40 ft.
Building Length (L): 60 ft.
Eave Height (he): 10 ft.
Foundation Height (hf): 0 ft.
Roof Pitch: 6 /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): 26.57 deg.
Mean Roof Height (h): 15.00 ft.
Ridge Height (hr): 20.00 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): 33.66 psf
End Zone Width (a): 3.00 ft.
Zone 2/2E Dist.: 20.00 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: 7 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 0.55 12.45 24.56
2 -0.10 -9.40 2.72
3 -0.45 -21.11 -8.99
4 -0.39 -19.21 -7.09
1E 0.73 18.44 30.56
2E -0.19 -12.47 -0.35
3E -0.58 -25.75 -13.63
4E -0.53 -24.07 -11.95
2OH -0.10 -3.34
2EOH -0.19 -6.41
3OH -0.45 -15.05
3EOH -0.58 -19.69
2OH+W -0.10/-0.7 -26.90
2EOH+W -0.19/-0.7 -29.97
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 2024D407
Engineer Company Name
123 Street City, State 12345
ph. (888) 777-5555    www.website.com 		-
11/27/2024 1
Subject
Customer
Location
Job No.
Engr.
Rev.
Date
Page

Load Case B: Longitudinal Direction
Surface GCpf Design Pressure (psf)
(w/ +GCpi) (w/ -GCpi)
1 -0.45 -21.21 -9.09
2 -0.69 -29.29 -17.17
3 -0.37 -18.52 -6.40
4 -0.45 -21.21 -9.09
5 0.40 7.41 19.53
6 -0.29 -15.82 -3.70
1E -0.48 -22.22 -10.10
2E -1.07 -42.08 -29.96
3E -0.53 -23.90 -11.78
4E -0.48 -22.22 -10.10
5E 0.61 14.48 26.60
6E -0.43 -20.54 -8.42
2OH -0.69 -23.23
2EOH -1.07 -36.02
3OH -0.37 -12.46
3EOH -0.53 -17.84
2EOH+W -1.07/-0.7 -59.59
3EOH+W -0.53/-0.7 -41.41
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 - 3.11 6.14
2T A - -2.35 0.68
3T A - -5.28 -2.25
4T A - -4.80 -1.77
5T B - 1.85 4.88
6T B - -3.96 -0.93
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 2024D407
Engineer Company Name
123 Street City, State 12345
ph. (888) 777-5555    www.website.com 		-
11/27/2024 2
Subject
Customer
Location
Job No.
Engr.
Rev.
Date
Page

5. Wind Load Calculations


1.) Lateral Loads - Transverse Direction:


Lateral Loads on Roof Diaphragm with Positive Internal Pressure
60 ft.
6.00 ft.
54.00 ft.
72.2 plf
57.6 plf
55.3 plf
37.3 plf
5170 lbs
4931 lbs
154.5 plf
126.7 plf
74.8 plf
56.4 plf
38.4 plf
20.0 plf
9.0 plf
8.1 plf
118.2 plf
90.3 plf
5.9 plf
4.5 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 5893 4274 -67 10101 5170 4931
Negative Internal Pressure 5893 4274 -67 10101 5170 4931
Roof Pressure = 0 5893 0 0 5893 3035 2859
Min. Pressures (8 psf, 16 psf) 2880 2880 245 6005 3002 3002
a) Bottom half of wall neglected in tributary area calculations.
b) Strength design values multiplied by 0.6 to obtain ASD values.
Wind Loads 2024D407
Engineer Company Name
123 Street City, State 12345
ph. (888) 777-5555    www.website.com 		-
11/27/2024 3
Subject
Customer
Location
Job No.
Engr.
Rev.
Date
Page

2.) Lateral Loads - Longitudinal Direction:


Lateral Loads on Roof Diaphragm with Positive Internal Pressure
40 ft.
3.00 ft.
37.00 ft.
61.6 plf
47.5 plf
43.4 plf
22.2 plf
47.3 lbs
355.4 lbs
1007.0 lbs
1393.7 lbs
2905 lbs
2792 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 2893 2803 0 5697 2905 2792
Negative Internal Pressure 2893 2803 0 5697 2905 2792
Roof Pressure = 0 2893 2803 0 5697 2905 2792
Min. Pressures (8 psf, 16 psf) 1920 1920 0 3840 1920 1920
a) Bottom half of wall neglected in tributary area calculations.
b) Strength design values multiplied by 0.6 to obtain ASD values.
Wind Loads 2024D407
Engineer Company Name
123 Street City, State 12345
ph. (888) 777-5555    www.website.com 		-
11/27/2024 4
Subject
Customer
Location
Job No.
Engr.
Rev.
Date
Page

3.) Roof Truss Reactions:


Roof Truss/Rafter Reactions: Transverse End Zone
-22 lbs
125 lbs
Max. Horz. ① = 229 lbs
Max. Uplift ① = 507 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 -133 783 -92 -109 17
Transverse End Zone -153 977 102 -22 125
Longitudinal Int. Zone 136 1190 316 229 87
Longitudinal End Zone 229 1648 774 507 267
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 2024D407
Engineer Company Name
123 Street City, State 12345
ph. (888) 777-5555    www.website.com 		-
11/27/2024 5