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This 2 page Class Notes was uploaded by Vergie Connelly DVM on Friday October 23, 2015. The Class Notes belongs to TA 240 at University of Louisville taught by Garry Brown in Fall. Since its upload, it has received 39 views. For similar materials see /class/228348/ta-240-university-of-louisville in Theater Arts at University of Louisville.
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Date Created: 10/23/15
September 22 2009 54 lumber is actually 1 Clear means no knots Plywood is sent to Asia to be prepared so it is actually 132 off Sometimes your plywood isn t square Stock scenery keep it and use it more than once Stock platforms work in multiples of 4 Storage Particle boards and wafer boards Ground up wood glued and pressed together dense heavy MDOmedium density overlay engineered plywood with a resin treated ber applied to both faces Cheap fumiture doesn t have any structural integrity not good with water doesn t take paint Drywall essentially chalk with a paper front and back Heavy ame retardant hard to move messy hard to finish Metal and steel Lighter thinner fabrications of steel that maintains the strength Good for oversize ats good for cantilevers and traps Tube steel round vs rectangular different sizes Steel vs wood strength and reduction in weight Thickness of steel is measured in gauge thickness of wall of steel not thickness of tube higher the number the thinner the steel Price is comparable to lumber Working with metal requires special skills Welding Two main techniques for welding Gas or oxyacetylene welding not as clean a ame so it s mixed with oxygen welding at its most fundamental Solder and brazing gluing metal pieces together with other pieces of metal Brazing higher temp soldering Welding melting steel together We use a mild steel with a melting point of roughly 2760 We usually only use it for bending hot vs cold bending Cutting steel Very slow shaping Safety with torch welding live ame don t put the torch down wear protective goggles More protection with arc welding stick welding or carbon arc welding MIG welding Making lightening and maintain it Carbon arc old school Generator to piece of steel then generator to carbon rod then touch rod to steel doesn t do anything completes circuit To really do it complete circuit then back away to make the electricity jump from the rod to the steel get heat and light intense safety gear control arc with how close the rod is to the steel dirty loud messy very few moving parts relatively ineXpensive beat slag off with a hammer different rods for different materials FluX material we add to the process to clean the area for the weld important to maintain structural integrity purifying agent to keep the weld clean Arc welding MIG metallic inert gas welding use a spool of thin steel wire instead of rod feeds through line and comes out of nozzle same as stick welding but we have an automatic feed gas serves as uX gas argon or carbon dioxide we use a miX faster and cleaner than carbon arc get into tighter spaces Variation TIG tungsten inert gas for aluminum welding lightweight without losing strength of steel lower melting point regular welder will kill it Square tube variety of thicknesses and sizes Steel pipe vs round tube Pipe is measured by internal dimension Tube is measured by exterior dimension
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