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  1. #1
    MembersZone Subscriber SIMP0LMAN's Avatar
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    Default Roof venting prop

    My department is interested in building a pitch roof venting prop. I've been looking around but haven't seen anything that meets my imagination. Does anybody have plans or know of any links to any good props?


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    Bump
    I am looking for the same info.

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    Contact your local/regional technical college that has a fire program. I called ours and I am waiting on a set of drawings as we speak. I have two cargo containers and I plan to put the half roof prop on top of one of the containers. Some key points to any roof prop are:

    1. Use heavy timber on the framing supports such as the vertical risers. You can use standard 2x's for the joist, but the heavy timber gives you a good solid base to work with.

    2. Beef up the framing around your vent cut-outs. This allows new roof sections to be dropped in place for each student even if the previous vent job went outside the marked cut area.

    3. Go talk to your local lumber/hardware stores. Tell them your looking for broken skids of roof shingles. Most of the big stores scrap this stuff once broken or opened up. They will be happy to give you this stuff. I pick up two to three skids every couple of months. If you develop a good working relationship, you can usually get your lumber and plywood thrown in as well.

    4. Use the under side of your prop for an attic simulator. You can enclose this and it works very well for attic training.

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    the ones I've seen appear to be simple stick built roofs with the cutting portion as a boxed out part for the parts to be cut. It looks to be almost identical to how one would make an opening for a skylight. I'd just make it a bit beefier so it can hold up to the repeated abuse and inevitable "oopsies". and of course a ledge running along the perimeter so your inserts just drop in and rest on the ledge.

    I'd ask someone that knows roofs and skylights to help you figure out exactly what you need (i bet you have someone in the dept that's a carpenter or does it on the side.). When you thing about it, that's all the simulator is really. A roof with a skylight, but instead of a window you drop in some plywood and 2x4s and let some firemen cut it.

    For extra mileage out of the prop, if you set it on a container. You could have half of the prop on the two containers and that side would have a shallow pitch. You could then make the other side of the roof have a steeper pitch. It would make the build a little bit more difficult, but could pay off in the long run.
    Last edited by nameless; 10-10-2009 at 06:28 PM.

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    MembersZone Subscriber JohnVBFD's Avatar
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    We simply bought some roofing material and built a small section of roof at the normal pitch of roofs in our area, plus an angle to allow for repeated cutting.

    We are careful not to cut the rafter material, ha. Afterwards we simply rip off the facing and place a new one down. We try and do this once a month. Another added benefit is the amount of people who donate property for us to train on. So that helps fill in time.
    Co 11
    Virginia Beach FD

    Amateurs practice until they get it right; professionals practice until they cannot get it wrong. Which one are you?

    'The fire went out and nobody got hurt' is a poor excuse for a fireground critique.

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    Quote Originally Posted by SIMP0LMAN View Post
    My department is interested in building a pitch roof venting prop. I've been looking around but haven't seen anything that meets my imagination. Does anybody have plans or know of any links to any good props?
    Contact my old dept in Georgia, the Dalton Fire Dept. at 706-278-7363, I'm sure they'll be glad to help you with one. They built one a few years ago that you can re-use. All you have to have for simulation is a pallet and plywood that drops into a precut area on the roof. It's probably the best venting mock-up I've seen anyway.

  7. #7
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    Roofs with the cutting portion as a boxed out part for the parts have to be cut.
    I have built a small section of roof but at the end i used a contractor to fix my roof.

  8. #8
    MembersZone Subscriber Fitzgerald's Avatar
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    Depending on the type of prop and how you create it, for a center rafter louver prop you can prolong the life of rafters and/or prop framing by face nailing pieces of oak (2x4 from oak pallets) to rafters that parrellel the rafter that you are rolling and also the rafters parallel to the head and base cut. The center rafter that you roll does not get faced nailed with oak and gets replaced after each louver evolution. Once the oak facing has been cut through, pull the piece off and put a new one on.

    So basically use face nailed oak pallet wood to preserve areas of your prop that you do not want cut but may come in contact with the chainsaw.

    If the oak is really hard or if you have cheap nails, you may have to pre-drill the wood to get nails through it.

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