Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
(OP)
When designing a window wall of 12'-0" at the base of the building for components and cladding -Simplified per ASCE 7-05, would I use Lambda = 1.21 for H<15', or would I use Lambda = 1.29 for H= 20'. (Page 40 of the ASCE 7-05 FIG 6-2). The actual mean roof height is 18'-0"(+-)It seems like I could use the lower bound since the element is below the mean height.






RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
DaveAtkins
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
Are you really saving that much material by fine tuning?
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
A corollary is that it would be beneficial if the researchers put effort into understanding why practitioners are finding ways around their requirements.
Simply calculating G per Sections 26.9.4 and 26.9.5 of ASCE7-10 is enough to rival ACI 318 Appendix D for complexity. And that's just but one step of many in getting to the design pressure. It makes me wonder if the researchers are engaged in an arms race. Or complexity race, rather.
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
Per the ASCE 7-05 & 7-10
"MEAN ROOF HEIGHT, h: 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 100, the mean roof height shall be the roof eave height."
Garth Dreger PE - AZ Phoenix area
As EOR's we should take the responsibility to design our structures to support the components we allow in our design per that industry standards.
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure
Thanks for the help.
I actually found the mean roof height in the front glossary (ASCE 7-05), but also decided to jump to the analytical procedure (Method 2) 0.00256KdKzKtIV^2I with +- GPF-GCPI. Also deducted 10 % per footnote #4. Worked like a charm.
RE: Mean Roof Height used for Components and Claddding -ASCE 7-05 -SImplified Procedure