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Design Wind Loads for 3-Story House

This document provides instructions to determine the design wind loads for a 3-story concrete house located in Bulacan, Philippines. It specifies the house dimensions, mean roof height, natural frequency, basic wind speed, exposure category, and adjustment factors. Tables and figures are referenced to determine the simplified design pressure for two load cases based on the roof slope, zones, and horizontal and vertical pressure coefficients. Load diagrams are included showing the direction and magnitude of wind pressures.

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'Julius Orpia
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347 views6 pages

Design Wind Loads for 3-Story House

This document provides instructions to determine the design wind loads for a 3-story concrete house located in Bulacan, Philippines. It specifies the house dimensions, mean roof height, natural frequency, basic wind speed, exposure category, and adjustment factors. Tables and figures are referenced to determine the simplified design pressure for two load cases based on the roof slope, zones, and horizontal and vertical pressure coefficients. Load diagrams are included showing the direction and magnitude of wind pressures.

Uploaded by

'Julius Orpia
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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SECTION 207C – Buildings MWFRS (Envelope Procedure)

Part 2: Enclosed Simple Low-Rise Buildings


#4. Determine the design wind loads for the concrete three story house below.
Location: Bulacan
Exposure C in all directions
Roof slope: 30°

9m

25m
12m
SECTION 207C – Buildings MWFRS (Envelope Procedure)
Part 2: Enclosed Simple Low-Rise Buildings
#4. Determine the design wind loads for the three story house below.
1. Mean roof height h = 10.732m
2. Enclosure Classification, Enclosed Sec 207A.10
3. Approximate natural frequency Eq. 207A.9-3
na  43.5 / h 0.9
 43.5 /10.372 0.9
 5.30 Hz
Building is Rigid
4. Occupancy IV Table 103-1
5. Basic Wind Speed, V = 260 kph Figure 207A.5-1A
7. Exposure Category : Exposure B
8. Topographic Factor, Kzt = 1.00 Sec 207A.8
9. Adjustment Factor, λ=1.4433 Figure 207C.6-1
SECTION 207C – Buildings MWFRS (Envelope Procedure)
Part 2: Enclosed Simple Low-Rise Buildings
#4. Determine the design wind loads for the three story house below.
10. Design pressure at h=9m and Exposure B, Ps30 or Ps9 Figure 207C.6-1

Ps30/Ps9
Basic Zones
Roof
Wind Load Horizontal Pressures Vertical Pressures Overhangs
Anlge
Speed Case
(degrees) A B C D E F G H EOH GOH
(kph)
1 2.06 1.41 1.64 1.13 0.16 -1.25 0.05 -1.07 -0.72 -0.83
250 30
2 2.06 1.41 1.64 1.13 0.79 -0.62 0.68 -0.44 -0.72 -0.83
1 2.24 1.53 1.78 1.23 0.17 -1.4 0.06 -1.2 -0.8 -0.9
260 30
2 2.24 1.53 1.78 1.23 0.86 -0.7 0.74 -0.5 -0.8 -0.9
1 2.97 2.03 2.36 1.62 0.23 -1.80 0.08 -1.55 -1.04 -1.19
300 30
2 2.97 2.03 2.36 1.62 1.14 -0.89 0.99 -0.63 -1.04 -1.19
SECTION 207C – Buildings MWFRS (Envelope Procedure)
Part 2: Enclosed Simple Low-Rise Buildings
#4. Determine the design wind loads for the three story house below.
11. Simplified design pressure, Ps Equation 207C.6-1
ps   K zt pS 30

Zones
Load Overhan
Horizontal Pressures Vertical Pressures
Case gs
A B C D E F G H EOH GO
H
Ps30/Ps9 2.24 1.53 1.78 1.23 0.17 -1.40 0.06 -1.20 -0.80 -0.90
1
Ps 3.23 2.21 2.57 1.78 0.25 -2.02 0.09 -1.73 -1.15 -1.30
Ps30/Ps9 2.24 1.53 1.78 1.23 0.86 -0.70 0.74 -0.50 -0.80 -0.90
2
Ps 3.23 2.21 2.57 1.78 1.24 -1.01 1.07 -0.72 -1.15 -1.30
SECTION 207C – Buildings MWFRS (Envelope Procedure)
Part 2: Enclosed Simple Low-Rise Buildings
#4. Determine the design wind loads for the three story house below.

LOAD CASE 1
SECTION 207C – Buildings MWFRS (Envelope Procedure)
Part 2: Enclosed Simple Low-Rise Buildings
#4. Determine the design wind loads for the three story house below.

LOAD CASE 2

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