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Project: SE54XC018 5710 Green St.
<br /> Technology4' Associates Date: 03-02-2017 salt Lake city, UT 84123
<br /> By: JH Tel. (801) 463-1020
<br /> Bending Moment: AI,,:=F,,,-6 ft+Fr,�7,,,-5 ft=3772 lb•ft
<br /> Flexural Strength: 0A1„:=10600 lb-ft (AISC Table 3-15)
<br /> if(0A1„<A11,,,"N.G","OK")_"OK"
<br /> Support Reactions: R,:= AI" — W=545 lb '?,2:= A1" + W=963 Ib
<br /> 5 ft 2 5 ft 2
<br /> Per Valmont design data (attached), each tripod mount is designed for the following loading:
<br /> Design Antenna Load: F,1(.4ig1,:=560 lb
<br /> if(I�' <I',t,.r "OK","N.G.")_"OK„
<br /> Design Base Leg Reaction (Uplift or Download): R.,t,.,ig,,:=1280 lb
<br /> if(R,<R,t,:,t,,,,,"OK","N.G.")_"OK"
<br /> if(IRz<It,tt ,"OK","N.G.„)_"OK”
<br /> The W6x15 curbs supporting the tripod system are anchored to the concrete roof deck with
<br /> 1/2" dia. wedge bolts at 24" o.c. spacing.
<br /> Critical anchor tension: ft:=2' =273 lb
<br /> Per Powers design data (attached) for 1/2" dia. steel wedge bolts:
<br /> Allowable Tension: F,,,r,,,,,:=715 lb
<br /> if(ft<F„tt "OK","N.G>")="OK„
<br /> Building RooftW
<br /> Sector Mount Loading: Total Weight , Wt=815 lb
<br /> Roof Bearing Area, A:=11.33 ft-5 ft=56.7 ftl
<br /> Roof Bearing Pressure, P:= A =14.4 t
<br /> A ft-
<br /> -- t Considering a minimum roof design live load of 20psf, the existing rooftop has adequate load
<br /> bearing capacity for the mount and equipment weight.
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