Bolts in dual dimensioned drawing
Bolts in dual dimensioned drawing
(OP)
We've provided dual dimensioned (Imperial and metric) drawings to our client and now they want us to show Imperial and metric call outs on bolts. We're a US company and we use U.S. standard structural bolts. I'm arguing against call outs such as 3/4" (19mm) bolt because a 19mm bolt is not a 3/4" bolt or vice versa. We will be providing 3/4" bolts. I think this needs to be abundantly clear to the client so they will know to have SAE wrenches and sockets on hand. Besides, is there any such thing as a 19mm bolt? (Don't answer that, just musing.) Anyway, I'm wondering if there is any written documentation (industry standard or whatever) that would support my viewpoint. It just seems like common sense to me. If you don't have a feel for what a 3/4" bolt is, is it really that hard to multiply 0.75 by 25.4 and get 19.05 and say, "Oh, so that's about the same size as a 20mm bolt."?






RE: Bolts in dual dimensioned drawing
Brian C Potter, PE
http://simplesupports.wordpress.com
RE: Bolts in dual dimensioned drawing
RE: Bolts in dual dimensioned drawing
RE: Bolts in dual dimensioned drawing
In my experience combined use of imperial/metric can cause problems. Making a clear choice at the beginning removes the problems.
www.FerrellEngineering.com
Providing fabrication and erection efficient structural design of connections. Consulting services for structural welding and bolting.
RE: Bolts in dual dimensioned drawing
RE: Bolts in dual dimensioned drawing