YieldZone - Lifting Lug Design
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Page:
Fixes To Do:
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Pump Skid
Job Num:
180298
1. Verify safety factor Nd on each load case. Just using worse case for now
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Date:
2.. Load must be applied veritcally right now due to weld not designed for bending and possible other issues
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Engineer:
TA
3. Equation 3.53 assumes that plate yeild stress is equal to or less than pin yeild stress
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4. Add Fatigue Requirements
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Code Cycle: AMSE B30.20-2010, BTH-1-2008
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Lifting Lug Design - ASME B30.20-2010, ASME BTH-1-2008
Rev:0 - 12/06/16
FyFu
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Service Class
A363658
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Location:
Lifting Lug 0
0 - 20,000
A572-Gr50
5065
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1
20,001 - 100,000
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Design Category:
A
(BTH-1: 2-2)
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100,001 - 500,000
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Magnitude and variation of loads are predictable
Expected Lifetime Cycles:
0 - 20,000
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500,001 - 2,000,000
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Enviromental loads are not severe
Fatigue Considered:
NO
(BTH-1: 3-1.4)
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"Over 2,000,001
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Nom Design Factor, Nd:
2.00
Yielding (BTH-1: 3-1.3)
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Service Class:
0
(BTH-1: 2-3)
2.00
Buckling (BTH-1: 3-1.3)
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2.40
Fracture (BTH-1: 3-1.3)
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2.40
Connections (BTH-1: 3-1.3)
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Lifting Lug Dimensions and Plate Properties
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Pin/hook diameter, Dp:
0.50in (Min)Cr:0.76
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Hole diameter, Dh:
1.00in
Effective width, beff:
0.73in
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Edge distance, be:
1.50in
Shear Planes, Av:
1.54in^2
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Edge distance, a:
1.00inPhi:27.50
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Radius, R:
1.50in0.39
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Plate thicknes, t:
0.75in
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Ult tensile strength, Fu:
36.00ksi
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Yield strength, Fy:
36.00ksi
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Tensile Strength Through Pin Hole (BTH-1: Eq 3-45)
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Tensile Strength Through Pin Hole, Pt:
10.50kip
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Single Plane Fracture (BTH-1: Eq 3-49)
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Tensile Strength Through Pin Hole, Pt:
12.01kip
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Double Plane Shear Strength (BTH-1:Eq 3-50)
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Double Plane Shear Strength, Pv:
13.50kip
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Bearing Stress (BTH-1:Eq 3-53)
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Allowable Bearing Stress, Fp*A:
7.03kip
Pin projected area, A:
0.38in^2
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Check Lug for Tension and Welds (BTH 3-2.1, 3-3.4)
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Full Pen or Fillet (FP, FT):
FT
Tension on net, Ft-n*An:
40.50kip
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Weld Total Length, Lw:
4.00in
Tension on gross, Ft-g*Ag:
45.00kip
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Weld size, Tw:
0.19in
Allow tension on weld, Ft
9.54kip
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ALLOWABLE LOAD ON LIFTING LUG
7.03Kips
ACTUAL LOAD ON LIFTING LUG
4.50Kips
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