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MissMercedes

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Two steel straps are use to hold member BCD level. The size of each strap is 12 mm thick and 50 mm wide. A 16 mm diameter bolt is used to connect thesteel straps to the 89 x 89 mm post at A. A 25 kN is applied at the free end of the cantilever at point D. Determine:

the tensile stress developed in the straps, and;

the bearing stress between the bolt and timber post at A.

diagram: http://s11.postimg.org/vqnu3bo8j/Untitled.png

I know the bearing stress will be the projected area of the bolt through the horizontal member as the denominator to (I think?) the 25 kN force plus the vertical component of the tensile stress in the metal straps. But I have no idea how to find that.

Are the only relevant measurements those which define the support triangle on the right?

Relevant Formulas:

Stress:

Bearing Load:

Trig functions.

the tensile stress developed in the straps, and;

the bearing stress between the bolt and timber post at A.

diagram: http://s11.postimg.org/vqnu3bo8j/Untitled.png

I know the bearing stress will be the projected area of the bolt through the horizontal member as the denominator to (I think?) the 25 kN force plus the vertical component of the tensile stress in the metal straps. But I have no idea how to find that.

Are the only relevant measurements those which define the support triangle on the right?

Relevant Formulas:

Stress:

Bearing Load:

Trig functions.

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