It could be 65" (b wall - 5.5" wall thickness), or 66.5" (c wall - 6.25" wall thickness).
30-inch (inside diameter) RCP has a wall thickness of 2.75 inches. Therefore, the outside diameter of 30-inch RCP is 35.5 inches.
Standards normally are 4 inch AA
$.30
W9xW9 welded wire mesh consists of lengths of steel wire welded into 9 inch by 9 inch squares. This material is used to reinforce concrete panels and floors.
Fcd, or the design compressive strength of concrete, is a critical parameter used in structural engineering to ensure that concrete elements can safely carry applied loads. It is derived from the characteristic compressive strength of concrete (fck) by applying a partial safety factor, typically denoted as γc. The value of Fcd is used in design calculations to ensure structural integrity and safety, accounting for uncertainties in material properties and loading conditions. It is expressed in megapascals (MPa) or pounds per square inch (psi).
The inside diameter of an 18-inch reinforced concrete pipe typically measures approximately 17.5 inches. This slight reduction accounts for the thickness of the pipe walls. However, the exact internal diameter can vary slightly depending on the manufacturer and specific design standards.
30-inch (inside diameter) RCP has a wall thickness of 2.75 inches. Therefore, the outside diameter of 30-inch RCP is 35.5 inches.
1/12th inside diameter plus 1 inch for 'B' wall (most common type), additionally, pipe sizes are normally in 1/4 or 1/2 foot increments, so the closest size would be a 24 inch diameter with 3 inch wall (24/12=2+1=3) having a outside barrel diameter thickness of 30 inches for 'A' wall 1/12th inside diameter, 'C' wall is 1/12th inside diameter plus 1 3/4 inch
2 1/2"
Less than an inch.
This all depends on the class of Reinforced Concrete Pipe (RCP) it is. Typically the manufactorers of RCP recommend one foot of compacted fill over a pipe for construction traffic. As long as the material is not wet I would drive over it any day.
Three-quarter inch diameter pipe refers to the outside diameter. Different pipe types of the same outside diameter usually have different inside diameters. ASTM SCH 40 pipe of 3/4 inch diameter has an inside diameter of 0.824 inches. ASTM CL 200 pipe of 3/4 inch diameter has an inside diameter of 0.930 inches because of the thinner wall.
0.3344 square inch
The outside diameter of a 1/2 inch PVC pipe is approximately 0.840 inches.
1/2 inch + 2*thickness of the pipe.
1 inch
0.0031