Lifting Lug Design Calcs As 4100

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PADEYE DESIGN CALCULATION Static empty mass weight uncertainty CG uncertainty DAF (Dynamic amplification factor) Total dymanic mass 50 kg 1 1 1.5 75 kg Min Number of slings used Included angle between slings Maximum sling tension 2 60 degrees 43 kg DESIGN TO AS4100 Working load limit Load factor Sling angle from horizontal Offset loading angle from x-z Plane WLL = LF = α= β= 43 KG 1.5 60 degrees 5 degrees LUG GEOMETRY Cheek plate thickness (each) Lug thickness OD of contact area Hole diameter Pin diameter Lug Base length Yield Stress Tensile Stress Capacity factor Correction factor (symetrical lifting) Weld metal Ultimate Strength Design Shear force Gross Area Net Area Net area required Base cross section area t= tp = d1= Pd= df = B= fy= fu= f= k t= Fuw= Table 9.7.3.10(1) N*= WLL * LF * 9.81 Ag = tp x d1 An = 0.25 * PI * (d1^2 - Pd^2) Anr = N*/(0.9fy) = Aw = B x tp = 0 6 50 19 16 75 125 410 0.9 1 170 637 300 1680 6 450 mm mm mm mm mm mm Mpa MPa AS4100 table 3.4 AS4100 table 7.3.2 MPa N mm^2 mm^2 mm^2 mm^2 Bearing Stress on pin hole (AS4100 9.5.1) Nominal Bearing capacity Vb = 3.2 df tp fu = ae tp fu = ae = (d1-Pd+df)/2 ae tp fu = fVb = Lower of N* <= fVb N*/fVb = UC = and where Vb = Utilisation coefficient Members with pin connections (AS4100 7.5) Tickness ratio <1? Net area beyond hole ratio <1? Area in way of hole ratio <1? 0.25(d1-Pd)/2/tp = Anr/(tp(d1-Pd)/2) = 1.33Anr/(tp(d1-Pd)/2) = 125952 N 23.5 mm 57810 N 52029 N OK 0.01 0.65 0.06 0.08 OK OK OK Gross section yield under tension (AS 4100 Section 7) fNt = Ag fy = Nominal section capacity and fNt = 0.85 kt An fu = fNt = Lesser of values Nominal section capacity Utilisation coefficient UC2= N*/fNt= 33750 N 1776 N 1776 N 0.36 Horizontal shear capacity (AS 4100 Section 5.11.4) Horizontal shear load on x-y plane V*w = N* x cosB = Shear capacity Vw = 0.6*fy Aw = V*w /f Vw = Shear capacity ratio 319 N 33750 N 0.01 OK 0.8 150 1 8 4.2 816 0.01 OK OK Bending about base (AS 4100 Section 5) Since shear load is less than 60% of member shear capacity, effects on tensile and bending capacity can be ignored. Weld Strength Calculation for full penetration fillet weld (AS4100 9.7) Capacity factor of a weld ∅𝑤 = Table 3.4 Effective length of weld 𝑙𝑤 = Reduction factor 𝑘𝑟 = Design throat thickness 𝑡𝑡 = Design force per unit length 𝑉𝑤∗ = 𝑁 ∗ 𝑙𝑤 = Nominal Weld Capacity per U/L 𝑉𝑤 = 0.6𝑓𝑢𝑤 𝑡𝑡 𝑘𝑟 = Weld strength ratio 𝑉𝑤∗ ∅𝑉𝑤 mm mm Nmm Nmm