May 12, 2008 · Unlike Dovetail, I learned my formwork/concrete almost solely from books, then had at it. Got conflicting advice and decided I'd go with what was printed. Two primarily: "Construction Manual: Concrete Formwork" ISBN 0-910460-03-5, and "Cast-in-Place Walls" booklet from the American Concrete Institute in Detroit (no ISBN #).

Aug 11, 2011 · You also might check for urethane coated concrete form plywood. The urethane coating acts as a release agent. However, concrete form plywood may have different structural specifications (glue longevity, sheer strength, etc.) and restrictions for formaldehyde content than ordinary or structural plywood, so you should check all the ratings if you plan on recycling the …

May 23, 2011 · Concrete Forms. Yersmay1, Thank you for your input and job site pictures. As noted in my OP, 16"x16" old block piers have already been dug out by someone else where the new piers are going to go; therefore, the hole is now way too large and "sloppy" to be useful to use as part of the form.

Jul 21, 2011 · He’s mulling the use of 3/4-in. plywood and framing lumber, but looks for guidance on the specifics of making the form. A heavy-duty proposal. Yersmay1 has been down this road before and suggests plywood forms wrapped with bands of 2x4s set on edge, and then braced on the sides with additional framing material.

Apr 15, 2011 · Re: Building concrete foundation forms, what to treat/cover them with? Typical wall forms here are 1-1/8" HDO plywood with cleats and snap ties. You can get 1', 2', 3', and 4' wide, by 8' long. New cost is around $40 for a 2' x 8' piece. They are easy to set up and strip, and they stack nicely on a trailer or truck bed.

Jul 19, 2009 · Masonite over at least 1/2" plywood or you will wind up with concrete feet.I posted earlier to use a double layer of 3/8"plywood if it bends easily. If not use 3 layers of 1/4" plywood.I believe he said the walls are 8'-0" high, masonite alone has no strength.

Aug 5, 2001 · Re: plywood for concrete forms My experience in the forming has been using 3/4 inch plywood. Use CDX for speciality forms or 1 or 2 pours (because it is cheap). Special plywood oil soaked (mdo) work for about 6 to 7 pours and corners and edges start coming apart but can get 10 pours plus out of them.

May 31, 2011 · When you’re making small scale architectural elements out of concrete, you could use a stick to make sure that the concrete is compacted into all of the voids, but there’s a better way. We’re making some pilasters for a concrete fireplace surround, but the same technique should apply to any small masonry project. Here's how to do it: Build a mold out of plywood …

Building the forms and making the joint—The bottoms of the forms for the countertop slabs were made from in. plywood. I cut the plywood 3 in. larger than the top in both directions to create flanges that sup-port the form edges. I ran three 2x4s under each form as supports. The 2x4s extended beyond the form to serve as carrying handles (top ...

Apr 8, 1999 · Concrete forming with OSB | Posted in General Discussion on April 8, 1999 01:13am We have always used 5/8″ CDX in our snap tie & waler system to form foundation walls.The CDX gets reused during construction either as subflooring or roof sheathing.