Dog Plate Design Calculator

Based on AISC ASD 9th Edition Standards

Developed by Hrithin
Input Parameters
Transverse Direction
Longitudinal Direction

Material Properties

Cargo Geometry

Forces

Dog Plate Geometry

Dog Plate Diagram

Allowable Stresses

Parameter Formula Value Unit
Allowable bearing stress, sb 0.9 × sy 211.5 MPa
Allowable shear stress, ta 0.4 × sy 94 MPa
Allowable tensile stress, st 0.6 × sy 141 MPa
Allowable bending stress, sbend 0.66 × sy 155.1 MPa
Allowable Von Mises stress, sc 0.75 × sy 176.25 MPa
Allowable weld stress, sw 0.3 × syw 144 MPa

Calculation Summary

Transverse Direction
Force per plate: 3.96 MT
Von Mises stress: 82.4 MPa
Status: OK
Longitudinal Direction
Force per plate: 3.68 MT
Von Mises stress: 76.8 MPa
Status: OK
Weld Checks
Transverse weld stress: 124.3 MPa
Longitudinal weld stress: 115.2 MPa
Status: OK

Overall Design Status

Design is satisfactory for all checks

All stress values are within allowable limits

Transverse Direction Strength Check

Design Forces and Moments

Parameter Value Unit
Total transverse force on cargo, FT 178.31 MT
Weight of the cargo, W 331 MT
Net uplift force on cargo, FV 145.04 MT
Net transverse overturning moment on cargo, MT 136.2 MT-m
No. of dog plates in transverse direction, nT 45 -
Transverse force on one dog plate, FT1 3.96 MT
Overturning moment on one dog plate, MT1 3.03 MT-m
Uplift force on one Dog Plate, FV1 3.56 MT

Dog Plate Properties

Parameter Value Unit
Height of dog plate, H1 165 mm
Height of cut, H2 42 mm
Length of dog plate (top), L1 284 mm
Length of dog plate (bottom), L2 230 mm
Thickness of web, t 15 mm
Shear area of dog plate, AS 3450 mm²
Section modulus of web plate bottom, Zs 142312.5 mm³
Effective tensile force, FTEN 2.45 MT
Moment of tensile/uplift forces, M 0.45 MT-m

Strength Check (Transverse Direction)

Check Calculated Value Allowable Value Status
Shear stress on dog plate, tS 11.25 94 OK
Tensile stress of dog plate, sT 6.96 141 OK
Bending stress on dog plate, sB 31.0 155.1 OK
Von Mises stress on dog plate, sV 82.4 176.25 OK

Weld Check (Fillet both sides)

Check Calculated Value Allowable Value Status
Shear stress of weld, tSW 11.25 144 OK
Tensile stress on weld, sTW 6.96 OK
Bending stress of weld, sBW 31.0 OK
Total stress on weld, sVW 124.3 OK

Transverse direction strength check is satisfactory

Longitudinal Direction Strength Check

Design Forces and Moments

Parameter Value Unit
Total longitudinal force on cargo, FL 110.38 MT
Weight of the cargo, W 331 MT
Net uplift force on cargo, FV 145.04 MT
Net longitudinal overturning moment on cargo, ML 84.3 MT-m
No. of dog plates in longitudinal direction, nL 30 -
Longitudinal force on one dog plate, FL1 3.68 MT
Overturning moment on one dog plate, ML1 2.81 MT-m
Uplift force on one Dog Plate, FV1 3.30 MT

Dog Plate Properties

Parameter Value Unit
Height of dog plate, H1 165 mm
Height of cut, H2 42 mm
Length of dog plate (top), L1 284 mm
Length of dog plate (bottom), L2 230 mm
Thickness of web, t 15 mm
Shear area of dog plate, AS 3450 mm²
Section modulus of web plate bottom, Zs 142312.5 mm³
Effective tensile force, FTEN 2.27 MT
Moment of tensile/uplift forces, M 0.42 MT-m

Strength Check (Longitudinal Direction)

Check Calculated Value Allowable Value Status
Shear stress on dog plate, tS 10.46 94 OK
Tensile stress of dog plate, sT 6.45 141 OK
Bending stress on dog plate, sB 28.9 155.1 OK
Von Mises stress on dog plate, sV 76.8 176.25 OK

Weld Check (Fillet both sides)

Check Calculated Value Allowable Value Status
Shear stress of weld, tSW 10.46 144 OK
Tensile stress on weld, sTW 6.45 OK
Bending stress of weld, sBW 28.9 OK
Total stress on weld, sVW 115.2 OK

Longitudinal direction strength check is satisfactory