PipeSoft
In tidewater areas and locations below sea level, the invert elevations will have negative numbers. PipeSoft accepts negative invert elevations as long as there is a positive slope of at least 0.0001 per cent.
PipeSoft computes the maximum capacity of a pipe based on pipe flowing full condition. This will facilitate the designer in the choice of pipe section. HGL analysis uses only partial flow or full flow conditions while computing head losses.
PipeSoft does not provide for reduction in area due to chamfers in rectangular sections. It is acknowledged that rectangular concrete sections will have chamfers (9 typical). This could result in a reduction in area ranging from 1% for a 10-ft x 10-ft section to 12.5% for a 3-ft x 3-ft section.
One way of dealing with this issue is to consider a proportionate reduction in width of the section. For example, for a rectangular section 6-ft x 4-ft, the net reduction in area due to chamfers is 5%. The analysis can be completed assuming a rectangular section 5.7-ft x 4-ft.
The skew is input to determine the bend losses in the pipe system while performing the hydraulic grade line analysis. In this analysis, the program identifies the skews of all incoming pipes at a junction and computes bend losses except for lateral pipes with inflow of 10 percent or less of the total flow through the junction.
VDOT Drainage Manual describes the method of computing Friction Slope (Equation 9.20 or Pipe Capacity Charts or Field's Wheel - Step 6, Page 9-50). PipeSoft uses Equation 9.20 of the Drainage Manual (Page 9-32). Computation of velocity (Step 8) is based on whether the pipe is flowing partially full or full. We have adopted a strict application of the Drainage Manual in this case.
We will in due course, introduce options to develop pipe profiles, pipe descriptions and quantity estimates. The Users will be notified as and when these modules are ready.
Yes! Each outfall from a pipe system is analyzed separately for HGL computations. The User must input the Outfall/End Node and the Tailwater Elevation. The User then selects the Compute HGL toggle and PipeSoft calculates the hydraulic grade line for all the nodes in the specified pipe system. A new LD-347 form is created for each outfall analyzed.
PipeSoft has a built in check that the Total Discharge calculated for a pipe section cannot be less than the sum of all the discharges entering the pipe for the same storm event.
CulvertSoft
Results from CulvertSoft match with results from HDS-5 Calculator. The calculator can be downloaded from the FHWA web site at the link provided below:
(http://www.fhwa.dot.gov/engineering/hydraulics/software/softwaredetail.cfm)
Sample outputs are given below:
Results from HY-8 are in error as shown below:
The check discharge should match with the Design Discharge. This does not happen with HY-8 program.
Address
15245 Shady Grove Rd Ste 335, Rockville, MD 20850
Contacts
Email: support@ensoftec.com