name | anything can go here |
D | horizontal area in square feet |
L | length of cylinder or pipe |
Inv | lowest elevation or invert of pipe |
angle | angle of inclined pipe, measured from the horizontal in degrees (examples: 90 for vertical, like a manhole, 0.2865 for about 0.5% slope) |
When pipes are used, the program computes a series of "master" areas by finding the total horizontal area at intervals in elevation. 100 intervals are used from the lowest to the highest elevation. Selecting the Long Print option will print these in the summary. The horizontal areas in an inclined pipe are computed using the formula shown above, which was derived by integration: (For vertical pipes, the areas are the circular cross-section, and for horizontal pipes the areas are the cord at the given depth times the length.)
(return)