1601 RUCKER AVE 2025-08-18 - Laserfiche WebLink

De9 enkolb Job: Wise Residence Job Number: C0B29040.00 Date: 3/8/2021 Fire Damage Repair ,By: CET Section: Checked by: Page: 7 Gravity Framing The existing attic floor joists are 2x6 @ 16"o.c. They will be sistered with new LVL 1-3/4'x 5-1/2". The governing LC is#4, D+ 0.75S+0.75L. Assume the new LVL sister takes 2/3 of the load and the existing rafter takes 1/3 of the load. The live load is taken as 30 psf to allow for future conversion to habitable space. Attic Joist-(N)Sister L= 15.0 ft Check A <L/ 180 = 1.00 in *15 ft simply supported span above Bedroom 2 controls Loading: w(1) = (8.1 D+ 22.5L)(1.33) + 3 *(2/3) 29 plf (0'-7.5) w(2) = (8.1 D+ 22.5L)(1.33) + 3 *(2/3) 29 plf (7.5'-15) P(1) = Pt. load from Typ Rafter*(2/3) 211 lb (@ 7.5) PI Summary: R(L) = 326 lb 1 R(R) = 326 lb WI W2 M(Max) = 1,618 lb-ft RI R2 w(Eq) = 58 plf 1.5x Va 2 CD = 1.00 CL = 1.00 CF = 1.11 Shear: A REQ = F' = 1.7 in M x 12 F' = 285 psi x C p = 285 psi Flexure: S REQ = = 7 in 3 F b F'b = 2,600 psi X C p C L C F = 2,891 psi Deflection: l REQ - 5wL4 = 33 in 4 E= 2,000,000 psi 13/4"x 51/2"LVL 384 E 4 (A=10, S=9, 1=24.3) Attic Joist-(E) L= 15.0 ft Check 4 <L/ 180 = 1.00 in Loading: w(1) = (8.1 D+ 22.5L)(1.3) +2 *(1/3) 14 plf (0'-7.5) w(2) = (8.1D+ 22.5L)(1.3) +2 *(1/3) 14 plf (7.5'-15) P(1) = Pt. load from Typ Rafter*(1/3)= 106 lb (@ 7.5) PI Summary: R(L) = 158 lb l R(R) = 158 lb WI W2 M(Max) = 790 lb-ft ` Rl R2 w(Eq) = 28 plf CD(FV,Fb) = 1.00 CL(Fb)= 1.00 CF(Fb) = 1.30 1.5xV C (F,,,Fb) = 1.00 C;(E) = 1.00 Cr(Fb) = 1.15 2 V AREA = F' - 1.3 in F', = 180 psi xCDC, = 180 psi S Mx12 = 7.0 in3 F'b = 900 psi xCDCLCFC;Cr = 1,346 psi REQ - F'b E'= 1,600,000 psi x C = 1,600,000 psi 1 5wL4 = 20.0 in4 2x6DF#2 REQ = 384 E A (A=8.3, S=7.6, 1=20.8)