- #1

sperrya

- 19

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## Homework Statement

A beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam.

## Homework Equations

Solid square cross section of beam: 100mm

Material: unknown

Distance between two beams: 3m

Assumption: material is reinforced concrete

weight of material: 24KN/m

_{3}

Area of square = height x width

volume = area of solid x length

dead load = volume x unit weight of material

## The Attempt at a Solution

area of square = 100mm x 100mm = 10,000mm

^{2}(0.0100m

^{2})

volume = 0.0100m

^{2}x 3m = 0.0300m

^{3}

dead load = 0.0300m

^{3}x 24KN/m

^{3}= 0.72KNVm

^{3}

∴ dead load = 0.72KNVm

^{3}/ m

^{3}= 720N

Can someone please tell me where I am going wrong with this as I have been advised this is wrong but I don't know where.

Thanks in advance for your help.