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## Main Question or Discussion Point

I'm comparing the shear formula for a beam in english and metric. But it seems the

formula or result don't match.

In English, the formula is Vc=2*b*d*sqrt(Fc)

Given

b=11.81102 inches

d=18.11024 inches

fc=4000 psi

Vc=2*b*d*sqrt(Fc)=27056 lbs

Now converting the units in metric.

b=300mm (11.81102 inches)

d=460mm (18.11024 inches)

fc=27.5 Mpa (4000 psi)

Vc=2*b*d*sqrt(Fc)=45.8 Kilonewton

To convert Kn to lbs. Divide Kn by 4.448 and multiply by 1000.

Doing that to the metric result. 45.8 Kn / 4.448 x 1000 = 10304 lbs

But 10304 lbs is not equal to the result in the english formula? Why?

Note this is not a homework. I just want to compare the two units in the formula.

Thanks.

formula or result don't match.

In English, the formula is Vc=2*b*d*sqrt(Fc)

Given

b=11.81102 inches

d=18.11024 inches

fc=4000 psi

Vc=2*b*d*sqrt(Fc)=27056 lbs

Now converting the units in metric.

b=300mm (11.81102 inches)

d=460mm (18.11024 inches)

fc=27.5 Mpa (4000 psi)

Vc=2*b*d*sqrt(Fc)=45.8 Kilonewton

To convert Kn to lbs. Divide Kn by 4.448 and multiply by 1000.

Doing that to the metric result. 45.8 Kn / 4.448 x 1000 = 10304 lbs

But 10304 lbs is not equal to the result in the english formula? Why?

Note this is not a homework. I just want to compare the two units in the formula.

Thanks.