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<br />Table V-I <br />) VARIABLES THAT INFLUENCE TIlE DEPTII-DAHAGE RElATIONSHIP <br /> <br />VARIABLE EFFECTS <br /> <br />Hvdrolo~ic Variables <br /> <br />velocity <br /> <br />Velocity is a major factor aggravating <br />structure and content damage, It limits <br />time for emergency flood proofing and <br />evacuation. Additional force creates <br />greater danger of foundation collapse and <br />forceful destruction of contents. <br /> <br />duration <br /> <br />Duration may be the most significant <br />factor in the destruction of building <br />fabric, Continued saturation will cause <br />wood to warp and rot, tile to buckle, and <br />metal objects and mechanical equipment to <br />rust, <br /> <br />sediment <br /> <br />Sediment can be particularly damaging to <br />the workings of mechanical equipment and <br />can create cleanup problems. <br /> <br />) <br /> <br />frequency <br /> <br />Repeated saturations,can have a <br />cumulative effect on the deterioration <br />of building fabric and the working of <br />mechanical equipment, <br /> <br />Structural Variables <br /> <br />building material <br /> <br />Steel frame and brick buildings tend to <br />be more durable in withstanding <br />inundation and less and susceptible to <br />collapse than other material, <br /> <br />inside construction <br /> <br />Styrofoam and similar types of <br />insulation are less susceptible to <br />damage than fiberglass and wool fiber <br />insulation. Most drywall and any <br />plaster will crumble under prolonged <br />inundation, Waterproof drywall will <br />hold up for long periods of inundation, <br />Paneling may be salvageable when other <br />wall coverings are not. <br /> <br />condition <br /> <br />Even the best building materials can <br />collapse under stress if the <br />construction is poor or is in <br />deteriorated condition. Building <br /> <br />) <br /> <br />V,37 <br />