Sheet Pile Wall Section Modulus

Pile lb ft kg m wall area lb ft2 kg m2 elastic in3 ft cm3 m plastic in3 ft cm3 m both sides ft2 ft.

Sheet pile wall section modulus.

The allowable stress of the material is a function of the material itself. Section modulus 650 k ft ft x 12 in ft 31 2 k in 2 therefore the required section modulus is 250 in 3 ft the us army corps of engineers design of sheet pile walls engineer manual from 1994 recommends accounting for a safety factor for the allowable bending stress of 50 50. The strength of sheet piling to resist bending is a combination of the shape of the section and the material out of which it is made. Stress m y i.

These two attributes have a positive influence on the section modulus. Continuous o pile wall with varying pipe diameter 1. Ec 3 5 considers also several reduction factors. When calculating the stress in a steel pile for example the formula using i is.

Among the essential characteristics of z shaped sheet piles are the continuous form of the web and the specific location of the interlock symmetrically on both sides of the neutral axis. Main pipe diameter custom 12 8 in 16 0 in 18 0 in 20 0 in 22 0 in 24 0 in 24 5 in 28 0 in 30 0 in 32 0 in 34 0 in 34 5 in 36 0 in 38 0 in 40 0 in 42 0 in 44 0 in 48 0 in 50 0 in 52 0 in 54 0 in 56 0 in 60 0 in 62 0 in 72 0 in 84 0 in. This section subsequently became the all time most popular sheet piling section in history. The major difference is that i moment of inertia is used for more general calculations.

Both the allowable bending moment and the section modulus are specified as per lineal foot or meter of wall. The plastic section modulus can be up to 25 higher than the elastic section modulus which leads to a significant reduction of the overall cost lighter sheet piles. Smin minimum section modulus. Z type sheet piles are the preferred choice for permanent applications.

Section modulus in3 sheet cm3 sheet moment of inertia in4 sheet cm4 sheet coating area pile lb ft kg m wall lb ft2 kg m2 both sides ft2 ft of single m m wall surface ft2 ft2 of wall m2 m2 ps 27 5 19 69 500 0 4 10 2 20 3500 30 9 14 8 09 171 2 45 1 67 1 27 5 134 3 3 3 54 5 3 221 3 65 1 11 1 11 1 11 ps 31 19 69 500 0 5 12 7 20 3500 30. When the pz 27 section was introduced in the 1940 s its section modulus of 30 2 in 3 ft was almost three times that published for the arch section with the identical weight per square foot of wall. Section modulus 1 in3 16 3870 cm3 1 cm3 0 0610 in3. Steel sheet piling is a manufactured construction product with a mechanical connection interlock at both ends of the section.

Steel sheet pile applications are typically designed to create a rigid barrier for earth and water while resisting the. The pile transfers pressure from the high side of the wall to the soil in. For instance for u piles a reduction of the section modulus and of the moment of inertia may have to be considered.