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2120 Chapter 7 Discussion


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    Nick Palmisano
    Keymaster
    Nick Palmisano

    Purpose

    This activity is designed to improve and develop a better understanding of the Module’s topics. The activity incorporates both critical thinking and the application for the Fire Officer.

    Discussion Post Instructions:

    Review Chapter 7 in your textbook.
    Review Module 7’s Learning Resources unit and slides.
    Post your response to the Discussion Forum.

    Discussion

    List disadvantages of wood construction, and share a work related call identifying one of these disadvantages.

    Discussion Post Requirements

    Your initial post must be a minimum of 100 words.

    You must respond to at least two of your classmates. Each response must be a minimum of 50 words.

    All discussion postings must be typed directly into the discussion forum.

    #15672

    jonathan shadoin
    Participant
    jonathan shadoin

    There are many disadvantages of using wood in building construction. Some disadvantages to wood are related to the natural growth of a tree and include, wood is never dimensionally true. Weather conditions can affect the size and shape of wood. Wood does not shrink or swell uniformly. Intrinsic defects include knots, knotholes, decay, insect damage, splits and warping. Wood strength varies significantly with species, grade, age, and growth rate of the tree. Wood strength changes over time after components are placed in use. During a recent call I had on shift we had a collapse of a ceiling that was over top of a walkway. Upon investigating we found that the joists, rafters and truss assembly had sustained significant termite damage. This termite damage in the wood made the joists weak and specifically weakened the wood where the nails holding the wire lathing for the plaster connected, which was the cause of the ceiling collapse.

    #20233

    KYLE FLEMING
    Participant
    KYLE FLEMING

    Some of the disadvantages to wood construction are high flammability, susceptibility to rot and insect damage, structural weakness over time, and vulnerability to moisture-related warping or decay.

    Furthermore, I have not personally dealt with a work-related call pertaining to wood-construction other than knowing the fire spread throughout attics due to open space between apartments in a multi-family complex. Due to the possibility of high flammability, as compared to other materials, there could be some reignition of fires if not properly searched with overhaul. Sometimes you might be laying in your bunk after the fire, and having to return to the residence to put out a fire you have already fought due the wood construction of the trusses in the attic. Always be vigilant when a fire could possible spread to other living quarters.

    #20324

    KYLE FLEMING
    Participant
    KYLE FLEMING

    I agree that wood has many disadvantages in construction, including its tendency to warp, swell, or shrink due to moisture and its natural defects like knots, splits, and insect damage. That is unfortunate scenario that you described DE Ed Shadoin, because of the collapsing of the building’s roof overhead. Especially with the older homes in South Florida, keeping a keen eye on the construction and the sound the building is making while fighting fire, search and rescue, and salvage & overhaul are very important for the safety of the crew.

    #20325
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