Solveall questions questions $(1-11)$ Please. Use Grade $50$ steel with a yield stress of $50$ Ksi for all of the problems.

Show all of your work to receive credit.

Use Load Resistance Factored Design $($LRFD$)$ for all of the problems.

Be sure to factor any loads given unless noted otherwise. Questions $1$ through $5$ are for the following framing plan.

Question $5$ is for the girder.

Assume the top flange is fully braced.

Use the Zx tables given in class to select a beam.

Uniform Dead Load $=150$ psf

Uniform Live Load $=200$ psf

$1.$ What is the lightest steel wide flange beam size required for the typical beam noted above based on bending only?

Use Zx table to select a beam. $(15$points$)$

$2.$ If you needed to pick the shallowest beam that would work for bending $($without having to worry about deflection$),$ what would it be$?$ No calculations required. $(5$points$)$

$3.$ What is the total load deflection for the initial beam you selected? Is it within acceptable limits$?(10$ points$)$

$4.$ Determine the end reaction of one of the beams and determine how many $$ diameter ASTM A$325$ bolts with threads excluded from the shear plane in single shear are needed to connect the beam into the girder. $(10$ points$)$

$5.$ Determine the end reaction of the girder and determine how many $$ diameter ASTM A$325$ bolts with threads excluded from the shear plane in single shear are needed to connect the girder into the column. $(5$ points$)$

$6.$ Steel bar joists are to be used for a floor system with a uniform dead load of $50$ psf and a uniform live load of $50$ psf$.$ The joists will span $35$ feet and are spaced at $4$ foot on center. Find the lightest joist possible from the attached handout. $(15$ points$)$

$7.$ A W$14$x$74$ column is braced against sidesway $($k$=1\mathrm{.}0)$ and has an unbraced length of $20$ feet in the X direction and $16$ feet in the Y direction. Based on the maximum allowable stress, Fc $,$ what is the maximum axial compressive load, Pu$,$ the column can support? $(15$ points$)$ Use Table A$\mathrm{.}3$ in the back of the book for properties of the column.

$8.$ Based on the $$rule of thumb$$ I noted in class, what would be the minimum depth of a steel beam that has to span $32$ feet? $(5$points$)$

$9.$ In connection design, why is it better to have the steel plate material yield before the bolts reach their ultimate shear stress? $(5$ points$)$

$10.$ From the chart in your book, what is the lightest steel pipe column that can support $110$ kips with a height of $16$ feet $($k$=1\mathrm{.}0)?(10$ points$)$

$11.$ What does a large kl$/$r value indicate in steel columns design? $(5$ points$)$

A W$14$ xx$74$ column is braced against sidesway $($k$=1\mathrm{.}0)$ and has an unbraced

length of $20$ feet in the X direction and $16$ feet in the Y direction. Based on the

maximum allowable stress, F$\_($c$),$ what is the maximum axial compressive load, P$\_($u$),$

the column can support? $(15$ points$)$ Use Table A$.3$ in the back of the book for

properties of the column.

Based on the "rule of thumb" I noted in class, what would be the minimum depth of a

steel beam that has to span $32$ feet? $(5$points$)$

In connection design, why is it better to have the steel plate material yield before the bolts

reach their ultimate shear stress? $(5$ points$)$

From the chart in your book, what is the lightest steel pipe column that can support $110$

kips with a height of $16$ feet $($k$=1\mathrm{.}0)?(10$ points$)$

What does a large kl$//$r value indicate in steel columns design? $(5$ points$)$