I have a college HNC engineering question which I am having problems with, I am OK with calculating the I values, and deflection (if needed). But am wondering on what formulae are required and how to use them, to calculate the maximum loading mass in Kg for a cantilevered beam.(adsbygoogle = window.adsbygoogle || []).push({});

The question is as follows;

A steel cantilever beam extends 2m from the side of a building. The beam has a rectangular cross section of height 100mm and width of 60mm (outside dimensions) and a wall thickness of 10mm.

Calculate the second moment of area, I, for the beam bending in a vertical plane.

I = 1/12bh^{3}= (1/12x60x100^{3}) - (1/12x40x80^{3})

I = 3.293x10^{6 }M^{4}

What is the maximum load which can be lifted by an electric hoist attached to the outer end of the steel beam, if the tensile stress in the beam due to bending is not to exceed 60MN/m^{2}. The mass of the hoist itself is 50kg.

modulus of elasticity of steel, E, = 210GN/m^{2}

modulus of rigidity for steel, G, = 80GN/m^{2}

Thanks in advance for any help given.

Greg

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# Homework Help: Cantilever beam maximum load

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