A proprietary steel spacer for use with trench mesh in raft slabs beams and strip footings. This spacer is manufactured by Bogar Enterprises. The common application is to space top and bottom trench mesh with the correct design height. It also holds the trench mesh securely so cover is maintained at concrete pour. Bogar spacers are commonly used in the Australian construction … [Read more...] about Bogar
An additional load placed atop existing earth or dead loads. Often used in connection with retaining walls.An extra excessive vertical load or weight caused by spoil, overburden, vehicles, equipment, or activities that may affect stability.An extra and usually excessive burden or supply.To overload or make beyond capacity a sanitary sewer system. If large enough, a surcharge … [Read more...] about Surcharge
Eerrata for AWS (American Welding Society) A2.4-98, Standard Symbols for Welding, Brazing, and Nondestructive Examination.This is the correction to the Welding Symbol Chart for AWS A2.4-98, pages 106 and 107. AWS A2.4-98 Standards Symbols for Welding Bracing and Nondestructive Examination Page 106 AWS A2.4-98 Standards Symbols for Welding Bracing and Nondestructive … [Read more...] about Welding Symbols Chart – AWS
Reduction ratios for ISO sheets & scales. A useful list to keep near the photocopier. A3 to A4 = ~70%A2 to A3 = ~70%A2 to A4 = 50%A1 to A2 = ~70%A1 to A3 = 50%A1 to A4 = ~35%A0 to A1 = ~70%A0 to A2 = 50%A0 to A3 = ~35%A0 to A4 = 25% B1 to A1 = ~82%B1 to B2 = ~70%B1 to A2 = ~60%B1 to B3 = 50%B1 to A3 = ~40%B1 to B4 = ~35%B1 to A4 = ~28% 1:1000 to 1:500 = 200%1:500 … [Read more...] about Reduction Ratios
What line width (or weight), do I use where, when structural drafting? In CAD, what color should I draw my structural elements. What line definitions suit what application? Below is a basic list which provide answers to these questions. This article should be read in conjunction with the article: Standard colors and line weights in CAD. Drawing … [Read more...] about What line width where?
Recommended edge distance for bolts. All edge distances shown are from centreline of bolt to edge of steel. BOLT DIA SHEARED OR HAND FLAME CUT MACHINE CUT SAWN OR PLANED ROLLED EDGE OF ROLLED SECTION NORMAL PITCH M12 25 20 15 45 M16 30 25 20 60 M20 35 30 25 70 M24 45 40 30 90 M30 55 45 40 100 M36 65 55 45 100 … [Read more...] about Edge Distance for Bolts