ASCE 7-10 Wind load calculation
Chapter 30. C. Example Problems Part 1 ‐Low‐Rise Buildings Part 2 ‐Low‐Rise Buildings (Simplified) Part 3 – Buildings with h 60 ft Part 4 – Buildings with h ASCE 7 ‐10. To use the C&C design procedures of ASCE 7‐10. Company JOB TITLE Chapter 13 sign example Address City, State JOB NO. Phone CALCULATED BY DATE CHECKED BY DATE Wind Loads - Other Structures: ASCE 7- 10 Ultimate Wind Pressures Wind Factor = 1.00 Gust Effect Factor (G) = 1.16 105 mph Kzt = 1.00 Exposure = C A. Solid Freestanding Walls & Solid Signs (& open signs with less than 30% open). . EFFECTIVE WIND AREA, A: (ASCE/SEI 7-10, similar at 7-16) The area used to determine (GC p). For component and cladding elements, the effective wind area (in Figs. 30.4-1 through 30.4-7, 30.5-1, 30.6-1, and 30.8-1 through 30.8-3) is the span length multiplied by an effective width that need not be less than one-third the span length.
Chapter 29 Wind on other structures and building appurtenances -MWFRS
General:
Chapter 29 covers wind on signs, Chimney, tanks, roof top equipments, lattice Frameworks, and truss towers
Velocity pressure:
Velocity pressure is calculated as
qz= 0.00256 KzKztKdV2(lb/ft2)
where V is basic wind speed, Kdis wind directionality factor, Kztis topographic factor from chapter 26.
Kzis velocity pressure exposure coefficient.
Asce 7 10 Chapter 30 Pdf
Velocity pressure exposure factors are listed Table 28.3-1 of ASCE 7-10 or can be calculated as
Kz= 2.01 (z/zg)2/a.
z is height above ground, z shall not be less than 15 ft. except that z shall not be less than 30 ft for exposure B for low rise building and for component and cladding.
aand zgare taken n table 26.9.1 as follows:
Exposure | a | zg(ft) |
B | 7.0 | 1200 |
C | 9.5 | 900 |
D | 11.5 | 700 |
Note: Kz is the same as in table 27.3-1.
Solid Freeestanding walls and solid sign
The wind force shall be calculated as
P = q G Cp Af
Where
qh is velopcity pressure at high h.
G = 0.85 is gust response factor from section 26.9.
Cfis net force coefficient from Figure 29.4-1.
Af is gross area of solid freestanding wall or solid sign.
Solid sign attached to walls
Solid sign attached to wall shall be design with wind pressure on wall. If sign is not directly attached to wall, the gap shall not be more than 3 ft and the edge of sign shall be at least 3 ft from wall.
Chimneys, tanks, rooftop equipments (with h > 60 ft), open signs, lattice frameworks, and truss towers
The wind force shall be calculated as
P = q G Cp Af
Where
qh is velopcity pressure at high h.
G = 0.85 is gust response factor from section 26.9.
Cfis net force coefficient from Figure 29.5-1 to 29.5-3
Af is gross area of solid freestanding wall or solid sign.
Roof top equipment with H less or equal to 60 ft
Asce 7-10 Chapter 30 Pdf
Horizontal wind force:
The horizontal wiind force shall be calculated as
Fh = q (GCr) Af
Where
qh is velopcity pressure at mean roof height h.
Af is vertical projection area of solid freestanding wall or solid sign.
GCr = 1.9 for Af < 0.1B h. and decrease to GCr = 1 for Af = B h.
Vertical wind force:
The vertical wiind force shall be calculated as
Fh = q (GCr) Af
Where
Asce 7 10 Pdf Download
qh is velopcity pressure at mean roof height h. General chemistry laboratory manual hayden mcneil.
Af is vertical projection area of solid freestanding wall or solid sign.
GCr = 1.5 for Af < 0.1B L. and decrease to GCr = 1 for Af = B L.
B, L and h are width, length and height of building
Example: