09-22-2010, 09:16 AM
What i use as a building contractor
reference:
masses of common steel structures
estimating handbook by D.C. Fortuna, chapter 5, page 11
W=PSL/45{1+[L/(2.76 sqr S)]} for steel strusses
W=Pw Sc h/45{1+[h/(2.76 sqr S)]} side steel framing
where
W = installed mass in kilograms
P = truss capacity in kg/m^2 of horizontal projection
S = bay distance betwwen steel trusses
L = truss span in meters
Pw = wind pressure against vertical wall i kg/m^2
Sc = column (panel support) distance in meters
h = column (panel) height in meters
notes:
purlins, cleats, sag rods, bracing struts, collectively from 7kg/m^2 to 20 kg/m^2 of projected area
Ridge ventilator, others to be treated separately
reference:
masses of common steel structures
estimating handbook by D.C. Fortuna, chapter 5, page 11
W=PSL/45{1+[L/(2.76 sqr S)]} for steel strusses
W=Pw Sc h/45{1+[h/(2.76 sqr S)]} side steel framing
where
W = installed mass in kilograms
P = truss capacity in kg/m^2 of horizontal projection
S = bay distance betwwen steel trusses
L = truss span in meters
Pw = wind pressure against vertical wall i kg/m^2
Sc = column (panel support) distance in meters
h = column (panel) height in meters
notes:
purlins, cleats, sag rods, bracing struts, collectively from 7kg/m^2 to 20 kg/m^2 of projected area
Ridge ventilator, others to be treated separately
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