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Not necessarily true, BendPak has sample calculations indicating that for some of their lift models the top member is structural and acts as a compression strut under normal loading conditions. https://www.bendpak.com/a-study-in-lift-design/engineering-report/ Last two diagrams indicate shear...

Not sure where they were sold but what little I know about them I'm assuming they were better than homeowner grade and sold through distributors of some kind. Below is a link to a previous discussion concerning Aero Industries (Mayville NY) and according to the link its successor Valley...

Yorktown was the predecessor to the Matco Tool Box factory in Lakewood NY/Jamestown NY. The owner of Yorktown eventually went back into the tool box business under the name Aero Industries of which I have one of their top boxes.

They ("bridging") are often required to brace the bottom chords of the roof trusses should the bottom chords go into compression due to wind uplift/suction on the roof. In commercial construction utilizing steel trusses/joists similar are required by OSHA for erection safety purposes as well as...

Great reading material in link below. That said, at a minimum we specify ASTM F1554 Grade 36 material for anchor bolts unless loads dictate otherwise. It is a newer spec than ASTM A36 and specifically for anchor bolts. That said your anchor bolts are probably subjected shears as well as tension...

Well done. This is basically what I was trying to get at on my post @ #15. In other words how far away must cracks be from the columns or that matter the whole lift assembly and not just worrying about a crack relative to an anchor bolt location. Controls joints are cracks. For my future use...

I would contact Challenger and also ask them if there is any recommendation on how far the lift columns should be from any crack in the floor such as a intentional one such as a control joint. In other words, in plan, how far from any concrete crack shall the lift assembly be installed i.e. left...

The newer "Concrete Foundation Minimum Requirement" as linked in post #5 is brutal. Looks like it has contributions from numerous folks with no one pulling it all together in a coherent document. For New Concrete Foundation Requirement: Long bars are temperature steel while short bars are the...

For a two post lift the anchor bolts and concrete slab/foundation must also be designed to resist the overturning moment/tipping force at the base of the columns and not just the vertical axial load.

From Advance Auto, Diehard metric 30 degree offset double box wrench set 6-17mm at I think $27 or so plus tax. Made in China but nicely finished and seem well made but have not been used yet.

I have to wonder if the ganged 2x12's spanning 20' are acting as compression struts in some way. Perhaps to laterally brace the LVL running front to back in the absence of any subfloor diaphragm? Properly ganged double 2x12's will have much more resistance than single 2x12's to buckling due to...

Yes, The added photo's seem to indicate a hip roof rather than a gable roof thus a whole different animal design wise.

From the photo's it looks like the roof structure is essentially a rafter & ridge board system, could be wrong, with the ceiling tension ties unfortunately discontinuous. The ceiling joist/framing looks stout but it does not look like it was worked correctly with the roof and wall systems, very...

I would also add the fact of if the seller is willing to ship to countries outside of the US & Canada since it seems those items will sell much higher than they would if the were offered to US buyers only. I wish Ebay would let me filter out US listings that are willing to ship to countries...

I would be more concerned with the possibility of there being any concrete control joints between the posts as well as too close to the sides of the posts.

Pick-ups from this week/weekend. Williams aluminum pipe wrench, Blackhawk puller, Vulcan nut drivers, driver and pliers. Went to a pro estate sale Thursday that opened at 12:00/lunchtime and made a trip during a late lunch to take a look at a vintage Craftsman top box shown on the sales...

Beautiful car and design. We had a lot of family members owning 50's & 60's Studebaker's back in the day.

1700 psi 40 hours after it was cored. No indication that I can see on when the concrete was actually installed.

Just to be clear I believe this is ASTM C109 "Standard Test Method for Compressive Strength of Hydraulic Cement Mortars" with of course cement mortar being one component of the concrete mix. I believe the OP misspoke when they said the leftover material is cement rather than concrete.

Been busy, but some pickups say over the say last 1.5 months or so, been surprisingly fruitful given the time of year. NOS Utica, Crescent & Channellock pliers Bunch of Snap-On stuff, from what little they had, from a tool hoarder estate sale in my city/town. For whatever reason the sale was...