boltDia 10[mm] "Nominal bolt diameter"
holeDia boltDia*1.1 "Bolt hole diameter"
headDia boltDia*1.6 "Bolt head diameter"
boltSpacing 55[mm] "Bolt spacing"
thicUp 10[mm] "Upper plate thickness"
thicLow 20[mm] "Lower plate thickness"
threadDepth thicLow-4[mm] "Depth of threaded hole"
contactWidth 40[mm] "Contact width"
plateLen 3*boltSpacing+contactWidth "Plate length"
plateWidth 2*boltSpacing+contactWidth "Plate width"
boltForce 30[kN] "Bolt pretension force"
numBolt 5 "Number of bolt"
par 0 "Solution parameter"