Bldg K IBN_Stamped_Calcs.pdf

This document is a comprehensive technical design specification and engineering calculation package for window washing equipment davits (mechanical lifting arms) for the Denver Veterans Affairs Medical Center project in Aurora, Colorado. The project is a joint venture between Kiewit-Turner, with equipment designed and manufactured by Tractel Ltd.'s Swingstage Division in Toronto, Ontario.

The specification comprises five main parts totaling 46 sheets: (1) Design notes and mechanical properties establishing a safety factor of 4 for window washing equipment with modified performance factor Φ=1, and material standards for steel conforming to CAN/CSA G40.21 (Type 44W and 50W) and aluminium conforming to ANSI/AWS D1.2-97; (2) Standard davit pedestal and port base calculations for 1.25 kip suspension loads with 8-foot-6-inch boom reach, including detailed stress analysis, bearing capacity checks, weld specifications, and validation of structural adequacy across multiple components (side plates, pedestals, top and bottom plates); (3) Davit mast calculations for the 8-foot-6-inch boom featuring an 8-inch SCH40 aluminium pipe (6061-T6) mast with comprehensive buckling analysis, gusset plate design, pivot pin specifications, and weld sizing; (4) Davit arm support frame calculations addressing boom strut design, mounting bolts, connecting plates, and vertical tie configurations with detailed stress analysis and section property validation; and (5) Safety line "TIRSMART" support specifications. All calculations demonstrate compliance with design criteria, with results marked "O.K." confirming structural adequacy. The equipment is designed for portable deployment with flush pedestal bases suitable for building facade work, complete with load paths, deflection analyses, and fatigue considerations across welded and bolted connections.