Engineering Data
Each page contains viewable, downloadable and printable engineering data sheets for the products detailed below. You will need Adobe Acrobat to download and print the file. If you need Adobe Acrobat, you can download it here for free.
Standard Pipe Openings Chart
This chart can be used to determine the minimum diameter opening necessary to accommodate one pipe entering a structure (both round and rectangular) at a 90 degree angle.
Pipe Layout Chart For Round Structures
Rebar Chart
Bar numbers are based on the number of 1/8 inches included in the nominal diameter of the bar. The nominal diameter of a deformed bar is equivalent to the diameter of a plain bar having the same weight per foot as the deformed bar.
Skewed Pipe Openings
For Rectangular Structures
The chart below can be used to determine the maximum wall length necessary to accommodate pipes entering a rectangular structure, at a skewed angle. Holes for skewed pipe openings are formed square and are cast at specified angles. For example: the minimum wall length necessary to accommodate a 30" rcp at a skewed angle at 45 degrees is 67".
Steel Equivalency Chart
Most steel reinforcing designs in the precast industry use grade 40 or 60 rebar. The yield strength of grade 40 rebar is 40,000 p.s.i.. Steel cross sectional areas may be reduced by using higher strength steels and still maintain equivalent yield strengths.
The following chart has been developed to show equivalent yield strengths for grade 40 rebar, grade 60 rebar, and 65 k.s.i. welded wire mesh. The equivalent steel areas are directly proportional to the yield strengths, therefore:
Grade 60 steel area = 40,000 / 60,000 x grade 40 steel area
65 k.s.i. welded wire mesh = 40,000/65,000 x grade 40 steel area
Welded Wire Mesh Chart.
