Search results for query: *

Sorry about the imprecise "ties" terminology. I was referring to the closed ties that the code requires on anything that is called a grade beam.

Lack of diplomacy is totally cool if it means helping someone avoid a mistake. In any case, the pricing exercise has already led to use of couplers. My original question regarded the reasoning behind the code and whether I had missed something, since the code commentary did not shed any...

It is a difficult site, in the middle of the forest. 20 footers can be dropped at the site. 40 footers could be brought within a couple hundred feet by truck. I'm pretty sure 60 footers would require helicopter delivery for the last mile.

Thanks for the replies. I considered calling these tension ties but was trying to avoid the cost of the mechanical splices. It is a 50 foot span and it would be difficult to get >20 ft rebar to the site - so that means lots of those mechanical splice sleeves. I didnt consider hairpins...

I need tension ties between footings of a pre-engineered metal building to resist outward forces of the portal frame's columns. Because these are reinforced concrete elements tying footings, they would seem to inescapably fall under "grade beam" requirements in section 21.12.3 of ACI 318, with...

I'm reviewing a proposal for a pre-engineered metal building (PEMB) with standing seam roof and don't know what I should be looking for in terms of purlin bracing. The snow load is 200 psf (315 ground snow) with a pitch of 6:12, so purlins experience significant off axis loads that make lateral...

Good news. I talked to the concrete plant today and the accelerator used in the mix is Pozzolith NC534, which is chloride free. They placed the footing in cool weather and there are no visible cracks thus far (2 weeks), so I hope no ill effects from the accelerator. The contractor said...

Thanks for the replies. The contractor said calcium chloride but I just got a look at the concrete delivery tag and it says: "6 sack 1/2" PM PL NC 2 dosage" Any chance the "NC 2 dosage" refers to a non-chloride accelerator of some sort? I plan to call the concrete plant tomorrow to ask...

Hi, I hired a contractor to replace the brick foundation on my two story house with an inverted "T" concrete foundation. The footing is 18" wide by 18" deep with an 8" stem wall. Reinforcing is #4 bars with 3" cover. Only after the concrete was in the forms did he explain he had ordered...