Laserfiche WebLink
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />a minimum six feet depth of flow through the louvers. The length of louver required is sized by <br /> <br />providing a net area in front of the louvers that will result in an approach velocity of 0.5 fps <br /> <br />perpendicular to the face. Assuming a flow depth of 6 feet and a design flow of 640 cfs, the <br /> <br />required length of louvers will be approximately 213 feet. This design assumes the louvers will <br /> <br />be constructed in panels, with 22 panels 10 feet long for a total length of 220 feet. The louver <br /> <br />panels will be made of individual bars with a spacing of 1 inch. The panels are then attached to a <br /> <br />structural steel beam and column support system. An access platform is provided along the <br /> <br />length of the louvers. <br /> <br />The louver screens do not require a mechanical cleaning system. However, it is anticipated that <br /> <br />the louvers will require periodic manual cleaning. <br /> <br />Estimated Cost <br /> <br />The louver screens as shown on figure 6 will be very similar in arrangement and therefore costs <br /> <br />to Option A. The difference between the two will be that the louvers have no cost associated <br /> <br />with the cleaner and that the louver panels may be slightly less expensive than the perforated <br /> <br />plate panels. For these reasons the cost for the louvered screens will be estimated to be about 15 <br /> <br />percent less than the flat plate screen. The estimated cost for Option D will be approximately <br /> <br />$1,700,000.00. <br /> <br />17 <br />