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<br /> <br />and placing the valve in the line. The valve was enclosed in a plastic stand- <br />pipe with a screw-on lid to provide easy access. <br />For the purpose of this test, plywood sheathing and wooden braces were <br />used to provide support for the protective fabric around the patio and porch. <br />These areas could be equipped with decorative railings of the desired height <br />to serve as permanent support for the fabric. A temporary brace can be in- <br />stalled at the time the system is to be used. Temporary bracing can also be <br />prepared for garage doors (which have excessive span) to support them when a <br />water load is acting on the door. <br />The fabric was raised from the permanent <br />to the house by permanently installed snaps. <br />the house; and, with the fabric in place, the <br /> <br />storage compartment and attached <br />A levee had been built around <br />house was ready for testing. <br /> <br />TestinK <br />Water was pumped into the area between the house and the dike (Fig- <br />ure 71). The water level was raised to a 1-ft head on 23 May 1984 and was <br />held overnight. On 24 May 1984, the water level was raised to produce a 3-ft <br />head on the walls of the house which was held for approximately 24 hr. <br />Test results <br />As the water level was being raised to the 1-ft head, underseepage devel- <br />oped rapidly but stabilized in about 2-1/2 hr to 10 gal per min. There was <br />some movement of fines into the sump, but the water cleared up during the <br />night of 23 May 1984. The pump (Figure 72) ran for about 40 sec and then cut <br />off for about 50 to 55 sec after the water level in the sump had been pumped <br />down to a set level. This cycle continued until the raising of the water <br />level around the house resumed at approximately 9:50 a.m. on 24 May 1984. <br />As the water level was being raised toward the 3-ft level, the underseep- <br />age increased. At 11:00 a.m. on 23 May 1984, the seepage level became too <br />high in the sump (the level setting for the pump cuton and cutoff was too <br />high). This development allowed the seepage water to rise excessively and <br />caused some water to seep under the garage door (Figure 73) which was the low- <br />est level for the house. The limits on the sump pump were changed, and the <br />water was kept at a lower elevation in the sump which decreased the rate of <br />seepage under the garage door. <br />There was a little seepage around the baseboards of some rooms (Fig- <br />ure 74). After the test, the cause of this seepage was found to be a leak at <br />the lap of the fabric. The lap of the fabric was heat-treated but was not <br /> <br />71 <br />