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SECTION 8: HOPPER GRADING
STEP 1: LAYOUT TWO (2) MASON'S LINES ACROSS THE POOL WALLS AS SHOWN IN FIGURE 18. SEE THE CHART WITH THE CORRECT DIMENSIONS FOR THE
SIZE OF YOUR POOL.
ATTACH THESE LINES TO A HOLE IN THE PANEL OR ANY OTHER CONVENIENTLOCATION. THESE LINES MUST BE TIGHT. FROM EACH OF THESE LINES TIE TWO (2) STRINGS LOOSELY. THESE STRINGS WILL HANG DOWN INTO THE HOPPER. MEASURE THE LENGTH OF THE STRING AND TIE A NUT OR A COUPLE OF WASHERS AT THE BOTTOM TO ACT AS A WEIGHT. THIS WILL ACCURATELY LOCATE THE FOUR (4) CORNERS OF THE HOPPER BOTTOM PATTERN PREVIOUSLY SET.
ADJUST THE HOPPER PATTERN AS NECESSARY TO BRING IT INTO ALIGNMENT WITH THE FOUR (4) STRINGS. DRIVE THE FOUR (4) STAKES INTO THE GROUND
l" BELOW THE TOP OF THE BOTTOM PA'ITERN WHICH SHOULD BE 1/2" LOWER THAN THE STRINGS. NAlL THE BO'ITOM PATHERN TO THE STAKES TO KEEP IT IN PLACE.
MEASURE FROM THE CORNER OF THE HOPPER BOTTOM PATTERN TO THE CORNER OF THE POOL AND CUT FOUR (4) PIECES OF 1" x 3' LUMBER TO THIS
LENGTH. PLACE THESE ON EDGE FROM THE WALL CORNERS T0 THE HOPPER BOTTOM PATTERN. SEE FIGURE 19. IT MAY BE NECESSARY TO REMOVE SOME DIRT TO GET THESE IN PLACE. REPEAT THIS FOR THE END OF THE HOPPER TOWARD
THE SHALLOW END.
THE HOPPER WALLS MUST BE FINAL GRADED TO PROVIDE A SPACE FOR THE BASE MATERIAL. IT IS VERY IMPORTANT THAT THE FINAL GRADING BE DONE EVENLY. IF A MAIN DRAIN IS TO BE INSTALLED. READ SECTION 18 ON MAIN DRAIN BEFORE PROCEEDING.
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