Question $1$:

A $75$ ft simple span bridge features a concrete deck slab supported by four steel girders spaced at $10$ ft on centers. The deck slab is

$9$ inches thick, made from $5$ ksi concrete, and contains a $\frac{3}{4}-$inch thick integral wearing surface.

The steel girders are Grade and $\{$:$F_u=60$ksiFu$=60$ksi$]$ built to act compositely with the deck using $5-$

inch long and $7/8-$inch diameter headed shear studs welded to the girder.

Given Data:

Span Length: $75$ ft

Girder Spacing: $10$ ft $($on centers$)$

Deck Thickness: $9$ in$.$

Wearing Surface: $\frac{3}{4}$ in$.$ thick

Concrete Strength: $5$ ksi

Steel Grade: $50$ ksi

Shear Studs: $5$ in$.$ long, $7/8$ in$.$ diameter

Dead Loads:

Future Wearing Surface: $30l\frac{b}{f}{t}^2$

SIP Forms, Cross Frames & Detailing: $220l\frac{b}{f}t$

Traffic Barrier: $380l\frac{b}{f}t$