It’s tough enough to cut a straight line freehand in something flat. It’s really hard in something round.

So to make accurate cuts in Sonotube concrete forms, I guide the saw with a strip of Sonotube. As shown in the drawing, I first cut a strip approximately 3 in. Wide off the Sonotube, which gives me a factory edge that I know to be square. I then cut a couple of slots about 6 in. From one another (this cut depends on the size of the hose clamp — I use a 4-in. Clamp for this application).

Next I make a cut through the strip between the slots and thread the hose clamp through the slots. To use the guide, I slip it over the form to be cut, and then I tighten the hose clamp until the guide is snug. The factory edge of the guide should be offset from the cutline to allow for the distance between the sawblade and the edge of the saw’s foot. Ptc License.dat Torrent Install. Rick Tyrell, Prosperity, SC.

I am building a post and beam deck with 8x8 and 8x10 beams i am using 12' sonar tubes with 3 pieces of rebar in each i dug the holes 4 feet deep but made them wider.

Perfect for decks and stub piers, these versatile and easy to use tubes are perfect for the do-it-yourselfer (DIY) working on projects like: • Pilings for homes and decks • Deck columns • Backyard play areas • Fences • Mailboxes and lamps • Gardens These extra-strong DIY concrete forms are made of multiple layers of high quality fiber, spiral wound and laminated with a heavy-duty adhesive. Sonotube Builder’s Tube concrete forms are built strong to withstand the heavy pressure of wet concrete. Builder's tubes are designed for below-grade use, but may be poured to three feet above the ground line.

They are not designed to be stripped. No bracing is needed unless used two feet above ground line. Even then, bracing requirements are minimal.