This worksheet is for checking weld sizes WELD OUTLINE CASE D References Pressure Vessel Handbook, 8th ed, Megyesy Mechanical Engineering Design, 7th ed, Shigley By: DJY 1 Date: 8/4/2008 60 Job: 6093 escription of weld: Vaporizer skid cross beam to main welds (tau) 2 i f DEFINITION OF SYMBOLS Length of weld, in # Allowable unit force on weld, kip per lin in of weld 3 7/ M = Bending moment, kip-in 3/ l = Bending moment arm length, in 5/ Tension or Compression Load 1/ Section Modulus of weld lines subjected to bending moment, in^2 7/ V = Vertical load for bending and/or shear, kip 3/ Fillet weld leg dimension, in 4 5/ Tensive or compressive force on weld, kip per lineal inch of weld 1/ Average vertical shear on fillet weld, kip per lineal inch of weld 3/ Bending force on weld, kip per lineal inch of weld 1/ Resultant load on fillet weld, kip per lineal inch of weld 1/ FORMULAS FOR FORCES ON WELD TENSION OR COMPRESSION VERTICAL SHEAR BENDING 5 P V M Weld is adequate & stress ratio = 0.51 INPUT 6 * To 1/ Weld Outline Case: 5 Over Strength Level of Weld Metal: 70* Over Mid-Span 3/8 in Over 12.50 kip If no tension or compression is present, P = 0 Over V = 12.50 kip If only tension or compression is present, V 7 Ove b = 4 in Weld dimension; refer to figure on right # d = 10 in Weld dimension; refer to figure on right l = 48 in If bending is not to be considered, l = 0 18.00 in 56.67 in^2 8 M = 150 lb-in 5.57 kip/lin in Calculating Tensive or Compressive For Calculating Shear Force Calculating Bending Force Calculating Resultant Force 0.69 kip/lin in 0.69 kip/lin i 2.65 kip/lin i 2.82 kip/lin in =12.5kip/18lin in =12.5kip/18lin in =150kip-in/56.67in^2 =SQRT(0.69^2 + 0.69^2 + 2.65^2) Aw = f = P = Sw = w = Wn = Ws = Wb = Wr = Wn = Ws = Wb = Aw Aw Sw RESULTANT FORCE: Wr = √(Wn 2 + Ws 2 + Wb 2 ) Cantilever or Mid-Span of Simply Supported Beam τ Over w = P = Aw = Sw = f = Wn = Ws = Wb = Wr = =P/Aw =V/Aw =M/Sw =SQRT(Wn^2 + Ws^2 + Wb^2)
WELD SIZEThis worksheet is for checking weld sizesWELD OUTLINE
CASETable 9-6 from "Mechanical Engineering Design", Shigley, 7th
ed., 2004, pg. 479References:Pressure Vessel Handbook, 8th ed,
MegyesyMechanical Engineering Design, 7th ed, ShigleySchedule A:
Allowable Load for Various Sizes of Fillet WeldsBy:DJY1Strength
Level of Weld Metal
(EXX)Date:8/4/0860*70*8090*100110*120Job:6093Allowable shear stress
on throat, ksi (1000 psi) of fillet weld or partial penetration
groove weldDescription of weld:Vaporizer skid cross beam to main
welds(tau) =18.021.024.027.030.033.036.02Allowable Unit Force on
Fillet Weld, kip/linear inf
=12.73h14.85h16.97h19.09h21.21h23.33h25.45hDEFINITION OF SYMBOLSLeg
Size w, inAllowable Unit Force for Various Sizes of Fillet Welds
kip/linear inAw =Length of weld,
in112.7314.8516.9719.0921.2123.3325.45f =Allowable unit force on
weld, kip per lin in of
weld37/811.1412.9914.8516.7018.5720.4122.27M =Bending moment,
kip-in3/49.5511.1412.7314.3215.9217.5019.09l =Bending moment arm
length, in5/87.969.2910.6111.9313.2714.5815.91P =Tension or
Compression Load1/26.377.428.489.5410.6111.6712.73Sw =Section
Modulus of weld lines subjected to bending moment,
in^27/165.576.507.428.359.2810.2111.14V =Vertical load for bending
and/or shear, kip3/84.775.576.367.167.958.759.54w =Fillet weld leg
dimension, in45/163.984.645.305.976.637.297.95Wn =Tensive or
compressive force on weld, kip per lineal inch of
weld1/43.183.714.244.775.305.836.36Ws =Average vertical shear on
fillet weld, kip per lineal inch of
weld3/162.392.783.183.583.984.384.77Wb =Bending force on weld, kip
per lineal inch of weld1/81.591.862.122.392.652.923.18Wr =Resultant
load on fillet weld, kip per lineal inch of
weld1/160.800.931.061.191.331.461.59FORMULAS FOR FORCES ON
WELD*Fillet welds actually tested by the joint AISC-AWS Task
Committee.TENSION OR COMPRESSIONVERTICAL SHEARBENDING5Loading
condition listWn =PWs =VWb =MCantileverAwAwSwSchedule B: Minimum
Fillet Weld Size, hMid-SpanRESULTANT FORCE: Wr =(Wn2 + Ws2 +
Wb2)N/AWeld is adequate & stress ratio = 0.51Material Thickness
of Thicker Part Joined, inWeld Size, inWeld Outline Case
LookupINPUT6* To 1/4 incl.1/8CaseAwSwWeld Outline Case:5Over
1/4To1/23/16110.0016.67Strength Level of Weld Metal:70*Over
1/2To3/41/4220.0033.33Loading condition for bending, ieCantilever
or Mid-Span of Simply Supported BeamMid-SpanOver 3/4To1
1/25/1638.0040.00w =3/8in0Over 1 1/2To2 1/43/8414.00240.74P
=12.50kipIf no tension or compression is present, P = 0Over 2
1/4To61/2518.0056.67V =12.50kipIf only tension or compression is
present, V = 07Over 65/8624.0042.86b =4inWeld dimension; refer to
figure on right728.0073.33d =10inWeld dimension; refer to figure on
rightNot to exceed the thickness of the thinner part.831.4278.54l
=48inIf bending is not to be considered, l = 0*Minimum size for
bridge application does not go below 3/16 in.Aw =18.00inFor minimum
fillet weld size, schedule does not go above 5/16 in fillet weld
for every 3/4 in material.Sw =56.67in^28M =150lb-inf =5.57kip/lin
inCalculating Tensive or Compressive ForceCalculating Shear
ForceCalculating Bending ForceCalculating Resultant ForceWn
=0.69kip/lin inWs =0.69kip/lin inWb =2.65kip/lin inWr =2.82kip/lin
in=P/Aw=V/Aw=M/Sw=SQRT(Wn^2 + Ws^2 + Wb^2)=12.5kip/18lin
in=12.5kip/18lin in=150kip-in/56.67in^2=SQRT(0.69^2 + 0.69^2 +
2.65^2)
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