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10179420_305 E. 4TH - Plan (2)
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10179420_305 E. 4TH - Plan (2)
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Last modified
6/9/2021 11:07:28 AM
Creation date
10/25/2020 9:44:13 PM
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Plan
Permit Number
10179420
Full Address
305 E Fourth St
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City Owned Building
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03 ANDERSON.& ASSOCIATES CONSULTING-ENGINEERS; INC. <br />3902 VILLA SAN JOSE DRIVE, JACKSONVILLE. FLORIDA 32217 (904) 731-7978 Fax (904) 731-7771 <br />PERIMETER TRUSS <br />STRUCTURAL CAPACITY <br />A. Check Member Bending Capacity <br />1. Check Local Buckling on 2" Dia. (1/8" Wall) Top Chord <br />Lc := 48.9 rl= 0.664 Therefore: =73.602 <br />r 1 <br />Al =0.736 Fal:= 20.2 - 0.126·- <br />r1 <br />Fa2:= <br />51000 Fa:= iffLe <br />-<66,Fal <br />irl ,Fa Fa = 9.414 <br />Wi-/Fa = 12 ksi (Weld Affected Zone) <br />Determine Allowable Force in Top Chord <br />Pc:= if(Fa< 12,Fa·Al, 12·Al)Pc = 6.932 kips <br />2. Check Net Tension on 2" Dia. (1/8" Wall) Bottom Chord <br />Al =0.736 <br />Therefore: <br />Ft:= 11 ksi (Weld Affected Zone) <br />Pt:= Ft·Al Pt = 8.099 kips <br />3. Check 1/8"Weldat Chord to Vertical and Horizontal Members <br />e =90'e =900 <br />d=2' <br />11 <br />-lp.>- <br />SIDE END <br />Determine Length of Weld: <br />d:= 2 D:= 2 <br />d <br />a:= ,-cs((Gc)a=l <br />dGe = 1.571 0 := asinD 2 0.-3.142 <br />U <br />b = 1.57 1 <br />4 <br />Lw:= a +.b + 3 ·Ja2 + 12 Lw = 8.157 Where:tw := 0.125 1 /8" Weld <br />Determine Allowable Force At Chord Member <br />Fw := 5 ksi (Allowable Stress at Weld) <br />Pew := iw·Lw·0.707-tu··1.5 Pew = 5.407 kips Controls
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