effective area of fastener
effective area of fastener
(OP)
can you help me determine the correct effective area for this fastener schedule. purlin spacing is 5'.
from my understanding, it's 5' x 0.5' for zone 1,2 and 3
0.5' is the approximate tributary width of the middle fasteners
thanks,
from my understanding, it's 5' x 0.5' for zone 1,2 and 3
0.5' is the approximate tributary width of the middle fasteners
thanks,






RE: effective area of fastener
Dik
RE: effective area of fastener
RE: effective area of fastener
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: effective area of fastener
RE: effective area of fastener
They indicated that for these calculations, they use the tributrary area of the panel*the purlin spacing to get the fastener uplift force.
Zone 1 vs zone 3? Are you talking about the wind zones? Not sure what code you're looking at, but zone 1 is the typical interior of the roof, zone 2 is the edge of the roof, and zone 3 is the corner. Take a look at ASCE 7-10 figure 30.4-2a. The width of the edge/corner regions is defined there.
RE: effective area of fastener
another day in paradise, or is paradise one day closer ?
RE: effective area of fastener
RE: effective area of fastener
"For cladding fasteners, the effective area shall not be greater than the area that is tributary to an individual fastener"
I take this as meaning: EA = [(1/2 x Distance between fasteners at high flute) + (1/2 x Distance between fasteners at low flute)] x Purlin/Joist Spacing. Based off of the depth of the metal panel profile I would be highly surprised if you were able to use anything other than the minimum 10ft2 for buildings <= 60 ft or 20ft2 for buildings with greater mean roof heights.
RE: effective area of fastener
The Zone 1, Zone 2 and Zone 3 loads can be used to design its respective configurations. Not all purlin spacings and purlin thicknesses have to be the same across the board all the time. Different loads can allow different configurations. However, Zone 3 would always have the worst case loads so if the design is typical across the roof (i.e. same fastening pattern and 5 ft purlin spacing), then this load should be used.