Problem Statement Your boss, the VP of Operations, requested that you design a free-standing elevated platform for heavy storage inside of the company's warehouse. The platform deck must be 12' x 24' (width x length) with a 18minimum vertical clearance (column height). The lumber most readily available and cost effective is Southern Pine with a Machine Stress Rating (MSR) of 1350f 1.4E. You decide to use nominal 2 lumber for planks and joists, the latter being placed on 24 centers. You determine that deflection should be limited to L/240. The company has significant (more than you need) quantities of 3 to 8 schedule 40, A36 steel pipe. The company also has various A992 steel wide - flange beam sections including W6x25, W8x18, W8x28, W8x48, W8x67, W10x33, W10x45, W12x22, and W12x35, W14x22 and several larger sections as well. Platform design shall address: 2" Dimensional Lumber Planks 1. Size of 2 joists and configuration (single, double) proposed 2. Is a nominal 2 lumber plank acceptable? If not, what do you suggest? 3. Which W - shape from the company's inventory do you propose to use for the beams to support the joists? Why? 4. Which pipe do you propose to use for the columns? Why? W-Shape Girder 2" Dimension Lumber Joists -Steel Pipe Post 18 Hint: 1) assume framing dead load = 10 psf; 2) use the Appendix A and B in this document to figure out the live load and lumber properties, respectively; 3) use the textbook Appendix 4 for column design. Appendix A TABLE 1607.1-continued MINIMUM UNIFORMLY DISTRIBUTED LIVE LOADS, LO. AND MINIMUM CONCENTRATED LIVE LOADS! OCCUPANCY OR USE UNIFORM CONCENTRATED (psf) (pounds) 30. Stairs and exits One- and two-family dwellings All other 40 100 300f 300f 31. Storage warehouses (shall be designed for heavier loads if required for anticipated storage) Heavy Light 250m 125m 32. Stores Retail First floor Upper floors Wholesale, all floors 100 75 125m 1,000 1,000 1,000 33. Vehicle barriers See Section 1607.8.3 34. Walkways and elevated platforms (other than exitways) 60 35. Yards and terraces, pedestrians 100m Note: m indicates that reductions to the listed live loads is not permissible. Appendix B 475 175 565 575 175 565 175 175 565 750 SOUTHERN PINE REFERENCE DESIGN VALUES Based on SPIB Grading Rules and AWC National Design Specification Values in psl (pounds per square Inch) Table 2 Mechanically Graded Lumber - 4 and less in thickness, 2' and wider Based on Normal Load Duration and Dry Service (MC