Recent content by beton1

Depends on building type, but Jed's method works. RSmeans or Walkers might have some more specifics or psf based quantities.

Another vote: don't worry.

R.S.Means

Best to get some help from a formwork/accessory supplier. Or read up on ACI publications. Formwork for Concrete is a good place to start. You need to get educated on this prior to making decisions like this.For example, 0.5m spacing of 2x4's won't work. You are looking for an answer, not guidance.

Agree with comments. Also, you can check with Ready Mix supplier for a '72 hour mix'. They can usually provide a concrete with very accelerated strength gains. Depends on what you want to spend and how critical your timeline is. May be worth the extra money.

Try Noble Trade or Emco or Wolseley. All have numerous locations in GTA/southern Ontario.

Heel? Heck, sounds like wood.

First step: is the fabricator certified? I assume this was built in a shop and transported. Second step: Independent testing agency may guide you in inspection and testing as per performance specs.

Cracked wall or not, the truck should not have been that close. And the wall certainly is not capable, under the circumstances, to hold the truck or the lateral load imposed. The truck ending up in the basement puts responsibility, some or all, at the slab contractor or whoever directed the...

Another source is the 'position' statements by the ASCC (American Society of Concrete Contractors.

You can do as VT or Jed have suggested. Another option, use the beam you mention as a saddle and then have a proper designed beam under it, conventionally placed(forming a Tee so to speak). You could then, for efficiency use pieces for the saddle (instead of whole length) if you are comfortable...

Canadian Highway Bridge Design Code, CAN/CSA-S6-06. You will have to search through for info on pedestrian bridges.

Good points; nothing significant to add except it may depend somewhat on application. Say you are pouring a slab for a basement versus a bridge slab or structural elevated slab.

I believe there are 8" and 6" units. The 8" are a full tile and the 6" is a 'bottom' where the concrete joist is. On a reinforcing project last year we 'discovered' a 14" spacing c-c. This sounds familiar. Have a close look from underneath if you can. Top surface probably has a 2" topping as...

Actually I saw this last week. Stopped at a gas station and the cashier/store/coffee building had steel deck on a unique wood/steel tube truss system. The joists consisted of top and bottom wood chords (2x4 I believe) and tubes (steel?)for diagonals (looked like they were clinched and bolted at...