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Jeebus. I guess I forgot I had asked this back then. Guess I'll go review that thread too.

When I see 'UHMW' listed, is that the same as UHMWPE and it's just shortened or are they 2 distinct products? We use UHMW a lot around here for crane boom slides and other things.

Might seem that way, but once you see how the jobsites are and how fast those would get dicked up with debris just from the airspaces you'd see that's a bad idea. The nice part of sliding is that its surface to surface so there's not any room for anything larger than a flake of rust to really...

A-doy. Should have done that from the get-go. My bad. This is a closeup of the plastic. This is the plastic stacked above the parts that actually slide on the plastic. These are a small assortment of the beams that the plastic gets bolted too.

Can't get away with just 5'. Due to the length of the kit just to support the test weight I'd need something like 40' to verify motion, beam to beam transfer, etc. Which has me wondering why it was put on the beams to begin with rather than the bottom of the slider pieces themselves. several...

I should clarify, it's not just access to soap flakes that we lost, it's access to "good" soap flakes. We've bought bulk like you suggest but they just don't work the same as the old Ivory flakes we used to get. Something in what they're using to make the soap causes them to ball up and not...

This might actually might be Delrin, that name sounds very familiar.

We use what is called a skidding system for moving heavy (100 ton range) transformers off of trailers and onto foundations in substations. This is a similar concept but different design: http://www.enerpac.com/en/heavy-lifting-technology/skidding-system Ours is essentially 2 rails made from...

Lomarandil, exactly my sentiments, most of these are one-offs, and small jobs, but that has a big effect. When a job is $3000, being off a couple hundred dollars due to steel costs is a couple percentage points on the profit margin, and margins are getting skinnier and skinnier in the small...

Once20036, I would concur, there's definitely some (lots of?) stuff I'm not understanding :) Have no fear, they do go to the engineer before production begins (heck, before material is even ordered since we need his sizing). This is strictly a means of estimating a reasonably close value without...

Thanks for the help everyone. Once20036's comments made me realize I was going about this a little wrong by trying to do a bunch of more-complicated things than I needed to. I solved the deflection calculation for I (in both the concentrated load at center and two equal loads symmetrically...

BUGGAR - I have read some statics books in the past, so I do understand a bit more than I let on, but not enough to feel competent. I just ordered the book you suggested on Amazon so I'll be reading that as soon as I see it, thanks! CANPRO - Well, honestly, it's not that I haven't tried that...

When bidding small fabrications, I often am asked to quote simple beams, usually with a single centered point load or two point loads (both symmetrical and asymmetrical), sometimes with a column on each end (I haven't seen us do any jobs with a midspan column). Conceptually, they usually are...

Per Metengr's suggestion, I'm crossposting this from the welding forum: (original thread: here I was viewing a job with one of our estimators. We are installing large metal hanging brackets to a block wall. In the middle of the wall span is a large column that supports the roof, a 2nd floor...

I know that welding to structural is done left and right, and the crane is my concern as well, *but* the question isn't whether a PE should sign off or not, it's which standard/code/regulation says they should. My VP and I are both tradesmen so we look at this as a no-brainer, but the president...

I was viewing a job today with one of our estimators. We are installing large metal hanging brackets to a block wall. In the middle of the wall span is a large column that supports the roof, a 2nd floor deck, and on the side we're working on there's also a large stool welded to support that...

Scenery: I'll look into the molybdenum. And yea, it was -14F here on the way to work today. Fun fun.

TBuelna, I'm trying to understand what you're saying and coming up empty. ;) Currently the cylinders are set to the eyes are approximately the same height, meaning the cylinders are parallel to the direction of travel (more or less). Are you saying that it should be tilted so it's higher at the...

The beams have cheek plates so heating the bottom of the flange isn't practical plus when you're dealing with hundreds of feet of beam that's a lot of labor which is why I'm keen on switching to something free flowing at below zero. We are in the Milwaukee area. Oldest machinery moving firm in...

tbuelna: Pulling isn't an option 95% of the time because of the way it's configured. We can't pull over the layover plates since they don't have the beam underneath them so there's nothing to react against, and the shoes are expandable with bolt on sections so they don't have eyes at both ends...