Select an appropriately designed K-series open web steel joist for the joist identified as JI in the figure below. In addition, select an appropriately designed KCS-series open web steel joist for the joist identified as J2. Joists designated as J2 support two air handlers that weigh 4.5 kips each. The air handlers are attached to the joists at the four corners of an air handler such that the weight of each air handler is transferred to the joists as point loads at the corner of the air handler. Draw a free body diagram, find reactions, and draw shear and bending moment diagrams for the joist designated J2. The architect has requested that the depth of both J1 and J2 must be equal. Specify bridging and provide a sketch of the bridging layout. Use LRFD for your analysis. Note for J2 you will need to study pages 150 through 154 in the Vulcraft catalog in order to design that joist. B2 Bl 3 ft 5 ft 3 ft 7 ft JI JI Jl J1 J2 J2 JI Jl JI Bl Roof Snow & Live Load = 43 psf 10 @ 5 ft. = 50 ft. Roof Dead Load: 5 Ply Roofing plus Gravel 6 psf 3" Tectum Plank 4 psf Estimate Joist weight 5 psf Miscellaneous 5 psf B2 26 ft