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Renovations in Ordinary Construction

Mon, 22 Feb 2010|

Paul Dansbach takes a look at firefighting concerns in an almost 100-year-old structure that has undergone several changes in occupancy and renovations.



I'll -- -- back and welcome fire engineering training minutes. Today we're gonna take a look at the laundromat behind us this building is an ordinary constructed building. Just like most buildings on main street USA. We're gonna look at some of the construction features of this building and renovation that took place in the building that create some concerns and hazards to firefighters. This building is about a hundred years old during a life of -- building there have been many commercial occupancies on the first war the current occupancy is one format. -- -- In order to support the weight of the washing machines on the floor -- out of the concrete base over the would forces. We're gonna get out the basement and see how that additional weight it's reported in the -- We're down the basement of this commercial occupancy. We're directly underneath the area where they have poured the concrete floor to support the weight of the washing machines and laundromat. As part of that alteration. They've added steel columns and steel beams to support the additional load imposed by the concrete. We're gonna take a look at the back of the building a few minutes. The back of the building as another corporation through -- One of the previous occupancies in this golden was a restaurant. And ever going to find out they also poured concrete floor -- -- the existing would forces. This alteration has created some concerns. For the fires are -- -- of war in the back of the -- When the first war this commercial occupancy was converted to a restaurant. A major portion of the first war -- war and -- war were removed. We're looking at the floor -- in the basement. Noticed that there is no depth to the floor -- During that renovation. Referring strip was added each side. Each word choice. A piece of lumber was that -- -- in between. Each of the foreign trips. It concrete floor was then word directly over the floor joists and the lumber installed in between -- -- That concrete war has imposed a very heavy load over the existing would forces. This -- was a Republican. Struck it would cast iron call. We see -- catch -- column we can recognize it as a cast iron column as the result of the -- patient and the wounding of the call those are tipped swabs that this is a cast -- call. Catch fire Collins also hollow catch fire by its very nature is subject to fracture and -- With the addition of -- concrete war. Being poured directly over the would rejoice we can see the impact that additional weight has had on the structure. We woke up at our -- the girder supports the floor joists the -- -- crushed down. Around. The cast iron -- This is evidence that that concrete war. Which was word over the would -- has added a significant amount of weight to this structure. This alteration creates a significant hazards to firefighters as a result of the additional weight being imposed on this structure. Should any of these catch -- columns failed during a fire. The weight of the additional war is likely to result in a large area of the war collapsing into the base. When looking at the columns in the basement of a building we have to understand structural hierarchy. In terms of structural hierarchy a column is a very important component the lower in the building the war of -- and structural hierarchy the column -- -- This column supports who would girder. Who would girder in turn supports. And others -- column. We can assume that that's steal column runs software the first war and -- -- Another would girder which in turn supports the second -- system. So failure of -- column in the basement is likely to result in the large area of collapse of not only the first war. The second war and potentially the roof of the structure. For the white the building the building may undergo several changes changes in occupancy and alterations. Firefighters should understand how the changes in occupancy and alteration. Affect the structural conditions within the bill. Thanks for watching this section of trading minutes.

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