$($a$)$ A built$-$up steel column comprising two ISWB $400$ RSJ sections with their webs spaced at $325mm$ and connected by $10mm$ thick battens transmits an axial load of $2000kN.$ SBC of boil at site $=300k\frac{N}{m}2.$ The safe permissible stress on the concrete bed$=4\frac{N}{m}m2.$ Design a suitable foundation for the column adopting a column base, gusseted base, and sketch the details of the foundation.

OR

$($b$)$ Draw a neat sketch of purlin and write its design steps.

$($a$)$ Calculate the safe compressive load of a bridge compression member of two channels ISMC$300,35\mathrm{.}8k\frac{g}{m}$ placed toe to toe. The effective length of member is $6m.$ the widths over the back of the channel is $320mm$ and the section is properly connected to bracings.

OR

$($b$)$ A ISMB$300,$ @ $0\mathrm{.}442k\frac{N}{m}$ transmits an end reaction of $11kN$ and an end moment of $80kNm$ to the flange of a column ISHB$300,$ @ $0\mathrm{.}630k\frac{N}{m}.$ Design the weld connections.

$($a$)$ Write down the steps involved in the aseismic design of steel buildings

OR

$($b$)$ Explain beam column design in steel sway frame.

$($a$)$ Find the shape factor of diamond section.

OR

$($b$)$ Fine $M_p$ Value for the frame.

$($a$)$ Calculate the safe load of a bridge compression member of two channels ISMC $350$ @ $421\mathrm{.}1k\frac{g}{m}$ placed toe to toe. The effective length of member is $7m.$ The widths over the back of the channel are $350mm$ and the section is properly connected by lacings.

OR

$($b$)$ A double angle discontinuous strut ISA $1507510mm$ long leg back to back is connected to either side by gusset plate of $10mm$ thick with $2$ bolts. The length of the strut between the intersections is $3\mathrm{.}5m.$ Determine the safe load carrying capacity of the section.