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Formwork for concrete stair

vadim | Posted in Construction Techniques on October 13, 2008 02:03am

I’m going to forming up a slab with two steps down. Becouse of the long run (8m long) my question is which is the best way to support these staps, and at the same time make them pretty straight. Thanks

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  1. RalphWicklund | Oct 13, 2008 02:52pm | #1

    See if this meets your needs.

    It's not the most fancy of formwork but it served the purpose and the steps are good.

    Basically a floating box on a box with bracing. More bracing was added after the pic was taken.

    Use a low slump mix and your palm sander to vibrate the sides of the form to minimize the voids that will occur.

    View Image

     



    Edited 10/13/2008 7:53 am ET by RalphWicklund

  2. JHOLE | Oct 13, 2008 03:21pm | #2

    What type of soil are you working with?

    This was about 8m long;

    Fwiw, on second - lower section - used long jet rods, with 2x8, poured, waited, pulled, filled rod holes - for small step.

    Remodeling Contractor just on the other side of the Glass City

    1. jrnbj | Oct 15, 2008 01:39am | #4

      What's a "jet rod"?

      1. JHOLE | Oct 15, 2008 02:47pm | #5

        The round metal concrete form stakes.

        Totally worth the money to have, for all kinds of uses, though they aint cheap.Remodeling Contractor just on the other side of the Glass City

        1. DaveRicheson | Oct 15, 2008 05:54pm | #6

          How do you store your form stakes?

          I'm looking for something better than the buckets I'm using now, but still be easily lifted.

          1. JHOLE | Oct 16, 2008 03:26am | #7

            LOL ---- Buckets.

            They get heavy pretty quick!

            but I lose half of them, just as quick. I swear they just walk away.Remodeling Contractor just on the other side of the Glass City

          2. DaveRicheson | Oct 16, 2008 01:19pm | #8

            but I lose half of them, just as quick

            So do I, but I'm more apt to leave them laying where I pulled them out. I put in a 4x6 form for lime dust last summer. Used a bunch of stakes, then pulled the  after I compacted the dust insde the form.

            Found one with the mower  a few weeks ago......, need to at least count the darn things when I use them.

  3. sungod | Oct 15, 2008 01:30am | #3

    Nail a 2 X 4 board to connect the tops of the riser form board to stiffen them. Wider steps require a "W" patern to the bracing. I cover the riser forms in 10 mil plastic to give the risers a slick finish.

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