CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
(OP)
I'm designing a cathedral ceiling and I am trying to determine how the wind, live and dead loads react on the I joists which are at a 10/12 or 40° pitch. The I-joist horizontal span is 15 feet. The roof is 35 feet long. Do you take the components of the forces which act perpendicular to the I-joist then treat it as a simply supported beam with a uniform load, or take all loads as if they were perpendicular to the I-joist? Also the cathedral roof has two gable roofs which intersect it and form valleys so the wind does not push on the full area of the roof. If you are familiar with wood structures subject to high wind loads, the ASCE:7-02 or any of the high wind design codes I really need your help. if you need more information I can supply you with a 3-d model or cad drawing. Thanks!
KPKKPM
KPKKPM





RE: CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
It covers wind effects and damages and the wind load provisions of ASCE 7-02. Learn current approaches for assessing wind loads and examining building performance in severe storms. It is also beneficial to individuals involved in the interpretation of wind load standards and codes. I found a few minor errors, but the guide is very informative.
RE: CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
RE: CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
Here is some additional info for your learning quest.
Span calculator for joists and rafters from the American Wood Council.
http://www.awc.org/calculators/span/calc/timbercalcstyle.asp
The WWPA Lumber Design Suite is the newest design tool available to assist engineers, architects and designers in properly specifying and using Western lumber products.
The Design Suite, working in concert with Microsoft's® Excel program, provides calculations for Western lumber in beams, joists, posts, studs and single shear connections.
Online Free Download for Hurricane Resistant Construction SSDT-1099 at:
http://www.iccsafe.org/cs/standards/is-hrc/SSTD10/index.html
Links:
http://www.wwpa.org/techguide/suite.htm
http://www.southernpine.com/tables/index.htm
http://web.usna.navy.mil/~greg/en442/files/NDS%20Tables.xls
RE: CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
RE: CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
The loading equates to 185-lbs/SF and the soil pressure is approx 1000lbs/SF. Should I worry about placing footings too or is the floating slab sufficeint?
The grade is level and not sloped. I am in the Northeast (NJ) however....
RE: CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
Have you considered frost heave and the building loading?.
RE: CATHEDRAL CEILING HIGH WIND STRUCTURAL DESIGN
you should post this in the geotechnical engineering - foundation engineering forum for a better response