ENGR$3024$

$14$ Truss Lab Answer Sheet

Use a yield strength of $36,000$ psi and modulus of elasticity of $29$ Mpsi $.$

Select diameters that are even increments of $\frac{1}{8}$ inch.

Use a minimum diameter of $0\mathrm{.}5$ inch.

Some trusses have zero$-$force members. If such members exist, use the minimum diameter of

$0\mathrm{.}5$ inches.

For compressive members, the slenderness ratio must be less than $200.$

Note that the truss is symmetric, so you need to analyze only half of the members.

The bolted joints allow the members to rotate slightly, so the joints are treated as pinned joints

as long as adequate lateral bracing is provided. Therefore, use $k=1$ for all compression

members.

A simple spreadsheet makes the selection of the compressive members easy $-$ enterthe length

of the member and the compressive load, and guess at the rod diameter. Calculate the stress

$\frac{P}{A},$ the slenderness ratio $,$ and the allowable stress from the AISC equations. Adjust the

diameter to find the minimum for which the stress is less than the allowable and for which $$ is

Use a yield strength of $36,000$ psi and modulus of elasticity of $29$ Mpsi $.$

Select diameters that are even increments of $\frac{1}{8}$ inch.

Use a minimum diameter of $0\mathrm{.}5$ inch.

Some trusses have zero$-$force members. If such members exist, use the minimum diameter of $0\mathrm{.}5$ inches.

For compressive members, the slenderness ratio must be less than $200.$

Note that the truss is symmetric, so you need to analyze only half of the members.

The bolted joints allow the members to rotate slightly, so the joints are treated as pinned joints as long as adequate lateral bracing is provided. Therefore, use $k=1$ for all compression members.

A simple spreadsheet makes the selection of the compressive members easy $-$ enterthe length of the member and the compressive load, and guess at the rod diameter. Calculate the stress $\frac{P}{A},$ the slenderness ratio $,$ and the allowable stress from the AISC equations. Adjust the diameter to find the minimum for which the stress is less than the allowable and for which $$ is

$\backslash$table$[[$Member$,\backslash$table$[[$Length$],[($in$)]],\backslash$table$[[$Load$],[($Ib$)]],\backslash$table$[[$Column Type$],[$Short$,],[$Long$,$ or$],[$Tensile$]],\backslash$table$[[$Tension or$],[$Compression$]],\backslash$table$[[$Diameter$],[($in$)]]],[$AB$,,,,,],[$AC$,,,,,],[$BC$,,,,,],[$BD$,,,,,],[$CD$,,,,,],[$CE$,,,,,],[$DF$,,,,,],[$DG$,,,,,],[$DE$,,,,,],[$FG$,,,,,],[$FH$,,,,,]]$