H.S. Bolt information can be found in AISC. AISC tables in Connection list bolt sizes from 1/2" to 1-1/2" for A325 and A490. See page 4-146. This is also repeated in the Commentary of the RCSC Specifications, see page 5-289.
In ASD Ninth Ed., the Connections tables usually start at 5/8" dia. bolts, but the table you referenced does show 1/2" dia. bolts. Are 1/2" dia bolts not often used, or a premium charged for them, so that they are not included in the shear and tension tables?
Likewise, is there a premium for 1 1/2" dia. bolts?
To answer your question, I would contact a fabricator to determine the usage and/or premium charged for 1/2" and 1-1/2" bolts.
Personally, I have specified/designed bolts in the 3/4" to 1" range.
One of the major manufacturers of bolts and screws here in the Midwest is St. Louis Screw and Bolt CO. Their number is 314-389-7500. I don't know if they have a website or not.
If you need 2 sizes use 3/4 and 1 inch. Do not use 7/8 with 3/4 or with 1. It is hard to tell the difference in field. We had this problem when 3/4 were installed instead of 7/8.
whymrg---and to all those field hands, erectors, ME's etc. who can trace their ancestory to the trees with no more than a generation past---
I have been in a snow storm, even cought out in the rain a time or two, but I'll be darned if I have ever had any of my men put a 3/4 inch bolt in a 7/8th inch hole pattern accept to help make it up! The MOST common bolt sizes in high rise construction are 3/4in. and 7/8th in. with 1" and 1 1/8" or larger in the lower floors, core column area or special applications. Most of the spandrels and some of the major girders are almost universally welded these days and the bolts are primarily for allembly purposes.
I don't know what part of the world your in---so I offer my most sincere appologies to those where the above practice may be accepted as common. No joke, are you putting me on? I have only been at this for 40 years so it is possible I may have missed something.
Hey, I've seen upper columns at column splices installed 180 degrees out, even when the columns were marked which side was east-west. I wouldnt put it past steel erectors to install 3/4" bolts where 7/8" are required.
Hey you guys - settle down here. You can bash rodbenders but don't bash the structural ironworker!
Acutally, I feel that mistakes can happen although many of us are ever vigilante. Well, except for the few 9-wire outfits!
Rod, what you should explain is that the raisin' gang is responsible for putting the bolts together for the pieces that they are rigging up to be raised. The connectors must rely on them to provide the correct size and number of fit up bolts. The bolt up gang is likewise fed bolts by the 'punk' who runs back and forth with a bolt list that coordinates bolts (dia, grip, etc) to specific locations. Thus, misplaced bolts can usually be traced to one or two persons. And the foreman will usually line them up real quick for wasting his time!
Sorry, I didn't mean to bash anybody. I've also seen excellent steel erectors that do everything right the first time. I think the problem was when the economy was red hot, everybody in the construction business needed bodies quick, so they'd grab any joe off the street or from the union hall to do work that would normally be done by someone with experience and who knows what they're looking at and doing. Therefore, mistakes were made. At the same time, in all our job specs, we specify that all welders be AWS certified. I'd go to the field, and not one of them would have their AWS card. Ive seen full pen welds completely contaminated with slag. I mean, the guy never bothered to remove the slag from his previous pass.
Again, there are good people out there who know what they're doing and do it well, and there are complete idiots out there. I've seen both.
pylko, It was posted in humor. Heck, I have seen some of the "stupidest" things in my 38 years as an Ironworker, most of which I won't say because no one would believe them.
Point of fact---The only reason I was so successful? I corrected my mistakes before anyone else could see them.(It has been said that if you meet a successful person, you may be assured that he has succeded at least ONCE!)
I know all in this forum should remain largely anonymous, but it would be "nice" to see a short bio. Just to give us an idea who we are conversing with, don't you think?
evelrod, I thought it was funny. THen I read Qshakes response, and it sounded like someone might be pissed! Not me, pal, it takes a little more than a forum on the web to get my goat!
Like you said, it's only a mistake if you dont catch it before someone else does.
pylko, You know , I spent the last few years on the job waiting for someone to catch on to me. I just couldn't believe "they" could pay me a six figure income for something so "simple" to do. The job, no matter what it was, seemed so straight forward and easy. I am not trying to toot my own horn here, but instead asking a "question"---Why is it so difficult to find competant or superior supervision? The "Peter Principal", perhaps?
Qshake---A long, long time ago, in a state far, far ,far away------I worked for a company , John F. Beasley Corp., and the standing joke was, "hey punk, bring me a roll of Beasley bolts".
It seems so inane today, but it wasn't then. I recall hanging W 30+ somethings on 9 wire more than a few times. We had no safety harnesses, we worked many floors above the now mandatory two floors or 25ft. above a decked floor. Lack of safety was a personal thing (second to the bottom line for some companies) and for me a tough fight to correct. We as Ironworkers have led the fight to build a world where a worker can be assured of a reasonable chance of surviving a career in the construction industry. After that "summer job" the engineering career I aspired to seemed to slide off in the distance. I do believe my education as an engineer was definately the reason for my success.
Rod
PS---John is long dead, now, but his company lives on---it is now American Bridge, and due in no small part to their superendant ( T.G.) and the California Ironworkers, a SAFE place to work.
I can't believe that you worked for Beasley. Hell, I've got an old hat hangin' around somewhere with their name on it. Of course, I've got an old American Bridge hard hat hangin' around too! You gotta love steel!! Young folks and concrete just don't get it. (well thats probably too strong but steel brings back memories)
JFB Takes me back at least 10 years to a time here in the Midwest when they erected two curved chord warren trusses (625' long, 2500 tons of steel apiece) and floated them upstream to place them on their bearings.
I've since heard the company was bought out by Kraemer Bros. Now, a spin off of some guys (those who didn't buy into Kramer)with old JFB put together a company called Rollins which is erecting two tied arch bridges (about 625' in length)that we designed and they have proposed to float them in. Of course, the tied arches have required much in the way of truss members to redirect the forces, but are presently underway right now.
My father-in-law was an IW foreman for JFB for 19 years until he retired in 1970. JFB, himself, was a brilliant businessman, and the strangest duck I ever saw. Lots of makeup and beautiful "arm candy" every where he went.
I quit one summer day in Texas when they had me land a buldle of decking on two little w6's that were wired. I may not be the brightest bulb, etc. but that was it for me.
I left and went to work for the REAL American Bridge at NORAD, the same American Bridge later bought by JFB Inc.
It IS a small world, and you are not the first person in these forums that I have found a link with!!!
