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<br /> <br />38 <br /> <br />//[1]] <br />/ / / I <br />COMBINATION PERIAANENT / TIMBER <br />CLOSURE AND FLOOD SHIELD FLOOD / <br />TO PROTECT ENTIRE WINDOW SHIELD <br />/ '/ <br />/ <br />/ <br />/ <br /> <br />/ <br />/ <br />/ <br />/ <br /> <br />[Ill, / <br />/ '/ <br />FLOOD SHIE'LD . / <br />TO PROTECT , ' / <br />LOWER PART / / / <br />OF WrDOW / / <br /> <br />/ <br />/ <br />/ <br />/ <br /> <br />/ <br /> <br />/ <br />FLOOD SHIELD FOR <br />ENTIRE OPENING <br />/ <br />/ <br />/ <br />/ <br />/ <br /> <br />EE <br /> <br />/ <br /> <br />~/ <br />/ <br />, <br />STEEL <br />CHANNELS <br /> <br />BRICK INSTALLED <br />AT LOWER LEVEL <br /> <br />Figure 28.-Types of exterior wall flood proofing closures. These sketches illustrate <br />several approaches which can be employed to flood proof openings in outer walls. <br /> <br />display window with an aluminum flood shield which can be bolted into place on the in- <br />side during floods but which can be stored at the back of the display area at other times. <br />A typical installation is shown in cross section in Figure 32. When a flood is expected, <br />the contents of the window are removed and the shield moved forward on a track and <br />bolted into place approximately four inches behind the glass. Rubberized gaskets pro- <br />vide the waterproof seal around the edges of the shield. A show window with a flood <br />shield in place is shown in Figure 33. A portion of the glass has been cut away to show <br />the location behind the plate glass window. <br />"Weep holes" are openings provided at the base of a window frame to be opened <br />when the shield is bolted into place. This permits flood waters to enter behind the glass <br />to counter the outside pressure and prevent breakage. At such installations it is also <br />necessary to protect the glass window from floating debris or ice. Rigid awnings, tim- <br />bers or metal screens can be placed in front of the window for this purpose. <br />Another type of flood shield arrangement is one that is counter-balanced on the in- <br />side and above the window. This method. allows an "open" view of the store interior, as <br />shown in Figure 34. <br />The flood shields shown in Figures 32, 33, and 34 are rlesigned to close off the en- <br />tire window area, but this may not always be necessary. Flood shields can be designed <br />to protect against a much lower flood, closing off only the lower part of a window. <br />Display windows can also be flood proofed by placing flood shields on the outside. <br />Such shields will have to be stored elsewhere and carried into position when needed. An <br />advantage of outside shields is that there is no need to protect the glass against the im- <br />pact of debris or ice. It would be desirable, however, to provide openings to permit <br />drainage of any seepage that might collect between the temporary closure and the glass. <br />This drainage would be channeled into the building and pum ped out above the flood levels. <br />There are advantages to both inside and outside flood shields. If the shields are on <br />the outside of the window, the water pressure against them helps to seal the shield <br />against the framework. If the shield is on the inside, it is within reach. Checks for <br />leakage can be maintained and any problem with a shield can be corrected more easily <br />if the bolts are inside and accessible rather than outside and perhaps submerged. <br />Pedestrian shopping arcades or first-floor-Ievel setbacks lend themselves to flood <br />proofing measures as indicated in Figure 35. Here the flood. shields are hinged from <br />