Laserfiche WebLink
<br /> <br />42 <br /> <br /> <br /> <br />n <br /> <br /> <br />Figure 32.-Cross section of show window illustrating aluminum flood shield. When flocxls <br />are anticipated, the shield which is suspended from a rack is moved forward and bolted <br />onto the frame on the inside of the glass. <br /> <br />the ceiling on the outside of the windows. They are tied. back against the ceiling in their <br />stored position. <br />Another methoo of flood proofing large window areas which are not used. for display <br />purposes is employed in the Pittsburgh Press Building. In this case (see Figure 16), <br />the large windows were replaced by small panes of 5/8 inch structural glass inserted in <br />a steel grid designed to resist the hydraulic loads imposed by the flood waters. This win. <br />daw construction resists the entry of flood water while still providing a source of natural <br />light. <br /> <br />Doorways <br />Whether a doorway is for public, personnel or freight use will influence the meas- <br />ures employed to effect closure during a flood. <br />At a public entrance the framework installation for a flood shield should either be <br />covered during flood-free periods or designed so that it will not detract from the physi- <br />cal appearance of the doorway (see Figures 14 and 15). As shown in Figure 14, flood <br />shields can be counterbalanced above doorways and recessed into the ceiling during stor- <br />age. When a flood warning comes, the shields are pulled down and bolted into place. <br />Another measure is to raise doorway thresholds, with access provided by gently <br />sloping pedestrian ramps. The height of the sill will determine the level of permanent <br />