Ignore the answer in 2.b, using a maximum bending moment of 100,000 ft-, select the most economical wide flange beam using the tables in Appendix 1 of your textbook for the outrigger beams. Replace the scaffold load in 2b.with 7.5 kips and determine the minimum weight of the counterweight, based on OSHA requirements. with 7.5 kips and determine the minimum weight of the counterweight, based on OSHA requirements. Show the values of all shear forces and moments. Using your scaffold load, draw a neat freebody, shear and moment diagrams of one of the outrigger beams. Determine the minimum breaking strength of the suspension cables, based on OSHA required F.O.S. The scaffold length is 36 feet and the width is 4 feet. In addition to the live load, include in your calculations, a total dead load (weight of the cables, scaffold and scaffold hoists) of 1500 lbs. There are two outrigger beams of A36 steel and are as shown is Sketch $1. Wellmade’s Putlog Coupler is Compatible with all scaffold systems: slung scaffold, prefabricated scaffolding, putlog scaffold, modular scaffold system, Tube and Coupler System in O.D 48.3mm. This problem is based on a hanging scaffold, with two working decks. The Put Lock Clamp connects scaffold putlog transom to your scaffold ledger in Right Angle. Refer to Sketch $1 and Example 4.2 on page 70 of your textbook.
Based on the post material provided, what is the minimum pipe size that can be safety used? Be sure it satisfies both bucking and combined stress conditions. Based on the bearer material prowled, what is the bearer material provided, what is the minimum pipe size that can be safely used? See Appendix 2 in your textbook for steel pipe properties. Assuring the ultimate bending strength of the planks IS 4000 psi (apply a 4: F.O.S), determine the required minimum plank thickness to the nearest 100th. There are three working levels and the anticipated scaffold loading will be medium duty. Bearers and runners are lobe located at a vertical spacing of 9 ft (largest post height) Posts are lo be 8 degree oc (plank length) parallel to the building wall and 3-1/2' apart (bearer length) perpendicular to the building wall. The bearers and posts are extra strong pipe and the pipe material is A36 steel with a yield stress of 36 ksi and modulus of elasticity of 29,000 ksi. Wood planks are used on each working level. The problem below is based on a similar structure. Transcribed image text: Refer to the tube and coupler scaffold shown In lecture and page 63 in your textbook and Example 4.1 on page 64 of your textbook.
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