Thrust Block Sizing Chart

Thrust Block Sizing Chart – (see sections 5.2.1.1, 5.2.1.2, and. Calculate the total thrust by selecting thrust /100 by size and type of fitting from table 1 and multiplying thrust /100. A b = (h)(b) = t (s f)/ s b 2 (h) = block height, (b) = block width. Size and type of the thrust block depends on maximum pressure, pipe size, kinds of soil and types of fittings.

Determining size and type of thrust blocking. Thrust blocks allow a narrow point force to be spread and distributed across larger areas of soil down to a pressure that the soil can bear. Based on the wssc (2019), 1 ft is the minimum depth of filling over the thrust block dipra (2016) stated that a standard proctor density of at least 90% must be achieved between. If size of thrust block has not been specified by engineer, the following example shows steps required to determine the bearing area.

Thrust Block Sizing Chart

F = safety factor (1.5) s b = soil bearing from table. The width of the thrust block is considered as 2250mm and length consider as 2000mm. It that takes a small handful of inputs and offers sizing and dimensions according to nfpa 13.

Pp= passive soil pressure (lbs/ft2) γ = backfill soil density (lbs/ft3) hc= mean depth from surface to the plane of resistance in feet (centerline of a pipe or center of bearing. Thrust at fittings in pounds at 100 psi of water pressure. With similar inputs as before, we’re now able to calculate the thrust block volume required, as well as.

There is also table a.10.8.2(a). The size and type of thrust block depends on pipe size, line pressure, type of fitting, degree of bend and type of soil. To calculate the area of contact with the soil, follow these steps:

In most cases, the size and type of thrust block will be. T = thrust force table, s. Determining size and type of thrust blocking.

Thrust Block Design.xls