From ASCE 7-05 (7-10 is similar): 'EFFECTIVE WIND AREA, A: The area used to determine GCp. For component and cladding elements, the effective wind area in Figs. 6-11 through 6-17 and Fig. 6-19 is the span length multiplied by an effective width that need not be less than onethird the span length.
Parapet Wind Loads making use of IBC/ASCE 7-02
Parapet Breeze Loads making use of IBC/ASCE 7-02
I style lighting gage steel curtain wall structure stud framework. Recently I have acquired to use the 2003 IBC breeze design for the very first period. I selected to make use of the ASCE 7-02 analytical process because the IBC made easier method do not specifically address parapets under componénts and cladding. Thé ASCE technique generated quite high parapet load of about twice the usual wall fill (very much, much higher than the older UBC a lot), and I possess verified my figures using a 'Information' released by ASCE. This particular job provides 9 foot cantilevred parapets.
My problem can be this: This job provides a 'bottom' stud style (size, gage, and spacing) provided in the agreement documents. I possess found the wall structure design to be insufficient with respect to the parapets. After confirming the concern I was informed the IBC simplified method had been used and authorized by the developing department.
I put on't believe the IBC simplified method can end up being utilized to determine parapet loading because it uses 'net' pressures combining inner and exterior stresses. I believe parapets should be subject matter to windward and leward stresses concurrently. Which is usually also why I believe the made easier method will not tackle parapets.
Cán anyone out presently there back me up ón this or provide some understanding into this subject? Before I trigger a main change purchase, I need to create certain I'm not course of action off right here.
THANK YOU!
My problem can be this: This job provides a 'bottom' stud style (size, gage, and spacing) provided in the agreement documents. I possess found the wall structure design to be insufficient with respect to the parapets. After confirming the concern I was informed the IBC simplified method had been used and authorized by the developing department.
I put on't believe the IBC simplified method can end up being utilized to determine parapet loading because it uses 'net' pressures combining inner and exterior stresses. I believe parapets should be subject matter to windward and leward stresses concurrently. Which is usually also why I believe the made easier method will not tackle parapets.
Cán anyone out presently there back me up ón this or provide some understanding into this subject? Before I trigger a main change purchase, I need to create certain I'm not course of action off right here.
THANK YOU!