Figure asce 7 95 external pressure coefficients gcp for loads on building components and cladding for enclosed or partially enclosed buildings with mean roof height h less than or equal to 60 ft 18 m.
Mean roof height asce 7.
Gc p can be determined for a multitude of roof types depicted in figure 30 4 1 through figure 30 4 7 and figure 27 4 3 in chapter 30 and chapter 27 of asce 7 10 respectively.
Pressure increases vary by zone and roof slope.
Asce 7 16 also.
Mean roof height mrh ft this is needed to determine canopy pressure.
Visually aama tir a15 14 illustrates the mean roof height as per the image below where h on the sloped roof is ridge height eave height 2.
The wind speeds correspond to 3 second gust speeds at 33 ft above ground for exposure c category.
Asce 7 10 provides two methods for wind load calculation.
The dimensions of the zones are mostly determined by a building s length and width.
Explanation of asce 7 05 asce 7 10 and asce 7 16.
For si 1 foot 304 8 mm.
We shall only calculate the design wind pressures for purlins and wall studs.
1 mile per hour 0 447 m s.
Mean roof height as defined in asce 7.
This is the average roof height of the main residence from the peak to the eave.
Interior field perimeter and corner see figure 3.
Np gravel and stone not permitted for any roof height.
Mean eave height ft select yes if within 90 of height at.
In some cases not shown in table 1 such as for zone 1 the revised coefficients produce an approximate doubling of roof pressures.
Asce 7 16 wind velocity to pressure hover click labels see help images at bottom.
Mean roof height asce 7 per asce 7 the mean roof height h is defined as the average of the roof eave height and the height to the highest point on the roof surface except that for roof angles of less than or equal to 10 the mean roof height is permitted to be taken as the roof eave height.
These changes affect how you determine wind uplift resistance.
The simplified procedure is for building with a simple diaphragm roof slope less than 10 degrees mean roof height less than 30 feet 9 meters regular shape rigid building no expansion joints flat terrain and not subjected to special wind condition.
Field perimeter and corner see figure 2.
A simplified procedure and an analytical procedure.
Asce 7 05 and asce 7 10 have three roof zones.
Figure asce 7 95 walls figure asce 7 95 walls.
See help glossary link above for explanation.
