Limit Yield Analysis of a Bolt ( D >= .25")
2005 NDS Input Data: Diameter of Bolt, D Reduced Diameter, Dr (lag screws) Member is a Lag Screw? Side Member Number of side members Is the side member steel? Thickness of Wood Side Member Thickness of Steel Side Member Width Angle of Load to Grain Specific Gravity of Wood Side Member Steel Side Member Fu Fe.|| Fe.perp Dowel Bearing Strength, Side Mem, Fe.s Es Thickness Main Member Is the main member concrete? Thickness of Main Member Width Angle of Load to Grain Specific Gravity of Wood Main Member Fe.|| Fe.perp Dowel Bearing Strength, Main Mem, Fe.m Dowel Bearing Strength of Concrete Use Dowel Bearing Strength Em Fastener Bending Yield Strength, Fyb 0.63 in 0.47 in Yes 1 No 1.5 in 0.5 in 5.5 in 0 deg 0.5 87000 psi 5600 psi 2824 psi 5600 psi 1700000 psi 1.50 in No 3.97 in 5.5 in 0 deg 0.5 5600 psi 3253 psi 5600 psi 7500 psi 5600 psi 1600000 psi 45000 psi
Spacing Data: Number of bolts in a row Number of Rows Total number of bolts L/D 2.4 C-C Spacing in the row || to grain + to grain Row Spacing || to grain + to grain End Distance || to grain, compression || to grain, tension + to grain Edge Distance || to grain + to grain, loaded edge + to unloaded grain, edge Actual 3.5 Actual 2.25 Actual 6.25 3 1 3
Required Min 2.5 0.94 Required 0.94 in 2.66 in Required Min 2.5 4.38 2.5 Required 0.94 in 2.5 in 0.94 in
1.88 in 1.88 in
Cdelta 1 1
1.25 in 2.19 in 1.25 in
Cdelta 1 1 1
Actual 1.5
Determination of Group Action Factor, Cg (NDS 10.3.6) EsAs 140.3E+5 EmAm 349.3E+5 Rea 0.402 gamma 88939 u 1.016 m 0.8385 Cg 0.976 Computed Values D Fyb Fes Fem ls lm Re Rt k1 k2 k3 Bolt capacity, Z.ss Bolt capacity, Z.ds 0.47 in 45000 psi 5600 psi 5600 psi 1.50 in 3.97 in 1.0000 2.646 0.883 1.056 1.363 561.8 lb/bolt 1123.6 lb/bolt
Mode 1m Mode Is Mode II Mode IIIm Mode IIIs Mode IV
Rd 4 4 3.6 3.2 3.2 3.2
Z SS 2617.0 989.1 970.7 1151.3 561.8 635.4
Z DS 2617.0 1978.2 N/A N/A 1123.6 1270.8
lb/bolt lb/bolt lb/bolt lb/bolt lb/bolt lb/bolt
Note that double shear values assume side members are same thickness and species Modifiers General Modifiers CM Ct Cdelta Cg ASD Modifiers: CD Modified bolt capacity, Z'
1.00 (Moisture Factor) 1.00 (Temperature Factor) 1.00 (Geometry Factor) 0.98 (Group Action Factor) LRFD Modifiers: KF*phi.z lamda
1.60 (Load Duration Factor) Single Double
2.16 0.80
ASD: LRFD:
877.4 947.6
1754.8 lb/bolt 1895.2 lb/bolt