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Those are good prices considering they include stamped drawings and for one of them a site visit. Can burn 2-3 hours on the calcs easily (ha, I've already burned 2, as I started messing with options for solid wood beams), plus another 2 hours on drawing. You get to ~$750 pretty quick. On a...

heh heh, who said I was joking. I AM a civil/ structural engineer. :beer:

Thumbing through 2009 IRC (sorry, cannot locate 2012 right now): For 2x4 ceiling joists 16 inches on center used in an uninhabitable attic space *without* storage (10 psf live load) the max spans are ~10.5 - 11 feet assuming a grade 2 or better for most of the wood species they list. Even...

So is the roof/ attic framed with rafters and joists, or is it done with trusses? If trusses, all bets are off. If the attic floor just uses joists you should be able to support with a beam; are the joists full-length vs two pieces spliced in the center? I hope you are okay with calculating...

I don't think you will get far using 2x6s as posts/ columns... Once you figure the loads the beams will be carry to the columns you can then look at sizing the columns.

Can you put down poly sheeting over the exposed soil area? Maybe weigh it down with some sang bags, etc. Tape the poly joints and seal it at the perimeter. If you need to walk/ drive over the exposed soil area then good luck addressing the moisture issue in a reliable manner; you'll just...

Might want to go talk to your local zoning office and ask them what luck/ success others have had getting similar variances from the Zoning Board. I found the people at the zoning desk where I live to be quite helpful.

Best thing you can do is call Hilti. They have people to help you sort it out.

Drop the slab thickness below 6 inches and the psi loading on the XPS increases (the loading increases pretty substantially if you drop to 4 inches). So all-in-all not too terribly difficult to excess the 12 psi load rating they suggest staying within for the 40 psi boards if you do not want...

FYI, for XPS, the compressive strength ratings are at 10% deformation. There has actually been a big stink in some jurisdictions recently about prohibiting the use of XPS in egress areas due to the potential for tripping hazards. The main issue is there is really no elastic deformation under...

I would look at a cold-applied urethane. Tremco has a couple good ones: TREMproof 201/60 - TREMproof® 201/60 is a high-solids, VOC-compliant, modified polyurethane waterproofing membrane. TREMproof 250GC - TREMproof® 250GC is a rapid-curing, high-solids, VOC-compliant modified polyurethane...

Might want to consult a spray foam applicator. I would think that moisture in the subgrade would cause a ton of blisters in the foam. Also not sure if you can reliably get a compressive strength anywhere close to the 100 psi XPS boards available from OC/ Foamular or Dow; at least for roofing...

That is good to hear. 'Course you'll need to make up for the lost work day by staying late Christmas Eve... :-)

Epoxy-set anchors usually have substantially higher pull-out strengths then wedge anchors for a given diameter. Hole prep/ cleaning is extra-important, as the bond of the epoxy to the concrete is what gives you the strength. I'd skip the quikrete though and go to www.powers.com.

Might want to call the lift manufacturer and get it straight from the horse's mouth. That way you have better ammo to present to your boss and the sketchy-sounding lift guy.

I will happily participate again if there is another SK/ HJE Day. I really appreciate the effort of all who made this possible. The paint inside my sockets varies from great to poor to none, but it's all good and they all perform their duties perfectly fine.

How thick are these panels? Based on dimensions you provided a 2 inch thick panel would be over 200 lbs. and I would find it hard to believe they could be much thinner than that. Did you look along the top edge to see if there were embedded lifting anchors recessed in pockets that may have...

I have to admit I have never thought of Harvard as a source for structural/ materials science info. Not sure I do now, either :-)

The pic is not the best, but it looks like the 'joists' are spaced up to 5 rafters apart, and it's a really long span (leading to the joists not being continuous). So definitely concur it looks dicey. Trying to install anything supported by the joists will require adding a bunch of nailers or...

Might want to consider metal panels for the 'finish'. You could insulated above them. I'm surprised your ceiling joists cannot support gyp board. It's pretty normal to design with allowance for ceiling/ hanging load. But they were designed only with enough strength for the roof/ floor above...