Laserfiche WebLink
<br /> <br />Removable cap, <br />plug or screen <br /> <br />i B t <br /> <br />~! <br />~ <br /> <br />Slotted inlel <br /> <br />Embankment <br /> <br />4" <br /> <br />D. Rows of 1" x 4" <br />vertical stots <br />centered. <br /> <br />Slotted inlet <br />See detail. <br /> <br />4- <br /> <br />4" <br /> <br />E. Degrees around <br />the circumfer- <br />ence. See <br />notes 1 & 2. <br /> <br />Orifice plate <br />See detail. <br /> <br />A <br />ff Orifrce plate <br />(R\ <br />~ Minimum thickness: <br />.10" for metal or fiberglass <br /> <br />c <br /> <br />Elbow <br />See note 5. <br /> <br />.25" for plastic or PVC <br /> <br />Principal spillway pipe wfth slotted riser <br /> <br />Standard DimensionsTable <br /> <br />A <br />in. <br /> <br />B <br />in. <br /> <br />C 0 <br />in. rows <br />mill.. <br /> <br />E Slot area Minimum wall thickness <br />(jegr. ft2/ll. corrugated smooth steel PVC <br />metal base in. in. <br /> <br />1.50-3.50 <br />3.75-5.50 <br />5.75'6.00 <br /> <br />6 <br />8 <br />10 <br /> <br />4 4 <br />6 6 <br />8 8 <br /> <br />gO <br />60 <br />45 <br /> <br />.167 <br />.250 <br />.383 <br /> <br />16 <br />16 <br />16 <br /> <br />.10 <br />.10 <br />.13 <br /> <br />.15 <br />.20 <br />.25 <br /> <br />Notes and Commerrts <br /> <br />1. Slotted inlots shall be fabricatod from corrugated <br />metal. smooth steel or PVC plastic pipe. Materials <br />shall have at least the minimum wall thickness given in . <br />the standard dimensions table. <br /> <br />5. Fabricated or standard olbow, fabricated or <br />standard t99 with main tile line or plug in upstream <br />end, or standard tee with one end embedded in <br />concrete. <br /> <br />2. Slots shall be cut cleanly and doburred. Ends of <br />slots may be round or square. <br /> <br />6. The haighllf inlet is above the sediment pool level <br />shall be such that the velocity of flow through tho slots <br />is Jess than 2.0 feet per second. <br /> <br />3. Orifice plate, cap and all fittings shall be snug and <br />securely fastened. Orifice plate shall be cleanly cut <br />and free of burrs with care taken not 10 round the <br />edges. It should be a minimum of 2.0 feet below <br />grade for proper tundioning. <br /> <br />7. Head on the orifice. if placed as suggested, may <br />be figured by adding 0.7 times the maximum depth of <br />impounded water plus the depth of the orifice below <br />grade. Has a relatively constant rate of change. <br /> <br />4. Tho portion of tho inlot below grado may be perfo. <br />rated with a gravel fjlter for additional dewatering of <br />basin. <br /> <br />Figure 6.1-7: Slotted riser standard dimensIons <br /> <br />6.1-10 <br /> <br />1O!ll9 <br />