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Balloon Frame vs. Platform Frame Construction

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Tue, 29 Mar 2011|

Paul Dansbach takes a look at a balloon frame home that is being renovated with a platform frame addition being built onto it.

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Automatically Generated Transcript (may not be 100% accurate)

Well my name is Paul that's back and welcome to fire and hearings training minutes in this session of -- minutes we're gonna look at a wood frame building. This building is currently -- the renovation the original building is a balloon frame construction. The addition being added to the rear of the structure is platform -- We will have the opportunity to view and understand the fire spread potential of platform frame -- balloon frame wood frame construction. Balloon frame construction -- construction which the exterior walls and interior walls run vertically from the basement. Past the first war the second war and potentially -- the -- with on fire stop -- A -- -- is created by the space between the two wall -- The exterior sheathing and what would be the back of the interior finish. That's space is open to the basement in balloon frame construction and fire in the basement -- -- vertically through the wall. Up past the -- word into the second floor and potentially up into the act. We also have the opportunity. For horizontal -- extension. There -- no fire stopping between the -- date. And rejoiced at the George thing is the space created between the two floor joists there was an opening between the end of me Joyce play. Into the vertical -- Looking at an interior partition it's an interior -- partition. Partition is balloon frame it's opened -- into the basement. Therefore any part of the cars in the basement will extend through this combustible void space in the stock today the space between his thoughts. Vertically it will run out into the space created by the forge. This partition does not extend beyond the first floor so the fire extension is -- will be limited from the basement the first war however. Once the fire reaches rejoice today the space created by to forge woods fired going to run horizontally. In the case of this structure of the far will run to the -- wall and the -- will run to those exterior walls turned vertical again in the balloon framing and head towards the. Another fire expansion potential with the -- frame construction is when the -- -- on a war of the dwelling. As a -- and far. If the fire extends beyond the interior finish for example in this building the original construction. Was would -- with plaster as the interior finish. Another interior finish could also be drivable for the -- get beyond the interior -- Why would stand in rejoiced in it again in space created. By the way joints. Firewall -- horizontally in the -- And we'll have the same fire extension potential when the fire reaches the B and -- you walls of this building. Where will turn vertical and run for the second war and the attic through the exterior walls of balloon frame construction. We are in the addition to the structure. Edition is being constructed of platform frame. Platform frame construction. Is one in which the foundation is constructed and then the first war is constructed on top of the foundation. The first war extends. The exterior wall of the structure. Then one story of wood frames bugs is constructed -- -- gulf war. That construction method used -- two by four plate. On top of the floor system. That's who by four plate and this method of construction. Builds in the fire -- it is referred to as inherent fire stopping as it is built into the structure as the building is constructed. The built in fire protection that two -- four played at the bottom. Prevents any vertical -- extension from the basement up. Into this -- additionally as we run vertically in the wall we get to the top. The wall before our floor joists and we see another two wife wore a double to buy for top place. That also eliminates the potential for vertical fire extinction story to story within this bill. In balloon frame construction we pointed out the possibility of fire extension -- -- exports as a Roman content fire and pierce is beyond. The interior finish of the building extending into the joy expect. With platform frame construction we do not have that potential should the fire started as a Roman -- fire. Get past the drywall on the ceiling and -- powers thoughtfully to the side wall in the -- -- The firewall not extend vertically the second floor as the plywood and -- decking the floor above is installed directly a ball. That plywood floor -- is a two by four plate. That construction method eliminates the fire extension possibility. Between the -- -- -- And the exterior forwarding through your wall partition for the -- -- In the area of concern in both platform frame and balloon frame construction is an area and we are utilities are run vertically in the walls. Any -- utility Iran poses the potential for vertical -- extension. Often time contractors. Will cut -- stopping away. Will cut the platform frame. Plates to vie for plates away to run plotting -- work and other associated utility lines. In our example here he drained wasting vent line they plumbing line is install it runs from the basement. It runs vertically through the wall space. -- passes into the second floor. The strain waste and vent line is an avenue that we checked for vertical file extension. I've -- line where pierces through the roof can be used as an indicator to determine where the vent line runs in the structure. Firefighters must aggressively check for vertical -- station where that rain wasted vent line runs vertically through the bill. Vertical fire extension is of Paramount concern for fire fire. Understanding the difference between platform frame and -- frame construction -- help us determine the potential for vertical -- -- And wood frame building. Thank you for watching this session of bioengineering and bring them.

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