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• H -FLUME INSTALLATION INSTRUCTIONS <br />1. Follow all instructions provided by the project engineers in the form of specifications, blue prints, etc. <br />2. There should be no drops, bends, flow junctions, etc. immediately upstream of the flume location. The <br />flume should be located in a straight section of the open channel. <br />3. The approaching flow should be uniformly distributed across the channel, tranquil, and subcritical. <br />4. The approaching flow should not be turbulent, surging, unbalanced, or possessing a poorly distributed <br />velocity pattern. <br />5. As a general guideline, a straight upstream approach length of 5 times the depth of the flume (D) will meet <br />these entrance conditions. <br />6. If baffles are used to correct or smooth the flow, they should be placed upstream of the flume at a distance <br />of at least 10 times the maximum head. Baffles are not recommended for sanitary or solids laden flows. <br />7. For channels wider than the entrance of the flume, an approach section with radius (R =0.5D) or flat 450 <br />wingwalls should be used to smoothly direct the flow into the flume. <br />8. Care must betaken when using 0.4' HS and 0.5'H-flumes on sanitary flow streams. Large solids can clog <br />•the base of the outlet of the flume. <br />9. Due to the low submergence ratio of the flumes, it is recommended that the discharge from the flume be <br />free spilling. <br />10. In earthen channels, rip rap may be necessary to minimize or prevent scouring downstream of the flume. <br />DO NOT USE CABLES OR CHAINS TO UNLOAD FLUMES. UNLOAD FLUMES WITH FABRIC <br />WARNING SLINGSIN CONJUNCTION WITHA SPREADER BAR OR BYLIFTING EYES <br />(IF PROVIDED), SPREADING THE LOAD, <br />THE FLOOR OF THE FLUME MUST BE SET LEVEL FROM FRONT TO SACKAND FROM SIDE <br />d' NtATTCE TO SIDE, THE V- SHAPED PORTION OF THE FLUME SHOULD BE SET DOWNSTEAM, A <br />LEVEL INSTALLATION IS CRITICAL TO THE PROPER OPERATION OF THE FLUME, <br />11. Set the flume in place and at the elevation indicated on the engineer's drawings. <br />12. For larger flumes, concrete piers may be poured perpendicular to the direction of flow for the flume to sit <br />on. Pre -cast concrete blocks may also be used. When piers or blocks are used, the floor of the flume <br />should rest on them and not on the stiffening ribs or flanges. <br />13. The flume must be secured from flotation. One of the following methods may be used: <br />• a. Wire should be run from the anchor clips to rebar, or <br />