3.) A viewing platform in a wild-animal park is supported by a row of aluminum pipe columns having length L = 3.25 m and outer diameter d = 100 mm. The bases of the columns are set in concrete footings and the tops of the columns are supported laterally (no deflection, but rotation is permitted) by the platform. The columns are being designed to support compressive loads P= 100 kN. Determine the minimum required wall thickness t of the columns if a factor of safety n = 3 is required with respect to theoretical Euler buckling load. What is the level of axial compressive stress in the column at the working load? Comment (For the aluminum, use 72 GPa for the modulus of elasticity and 480 MPa for the yield strength.) (b) L (a)

Q: 2) When designing for tension, what limit states of failure modes should be considered List two. A)…

A: When designing for tension, Two limit states of failures should be considered they are  1) yield…

Q: The 5-ft concrete post is reinforced with six steel bars, each with a -in. diameter. Knowing that E₁…

A: Total number of steel bars are  6 Diameter of steel = 7/8 inch Es = 29 x 106 psi Ec = 3.6 x 106 psi…

Q: Determine M for a reinforce concrete beam 16 in. wide by 32 in. deep reinforced with seven No. 10…

A:

Q: 1. The stairs of a high rise reinforced concrete building consists of a flight of steps cantilever…

A: Given data length of cantilever steps= 1.5 m assume n=15 we have to compute the area of steel r/f…

Q: For the beam and loading shown, design the cross section of the beam, knowing that the grade of…

A: Given:- The magnitude of the uniform load = 3 kN/m The depth of the beam = 150 mm The allowable…

Q: 1. The reinforced concrete cantilever retaining wall in Figure 1 is made with 3000 psi normalweight…

A: The objective of the question is to calculate the development length for the main reinforcement of a…

Q: Velocity = 250 kph ; Exposure = B; Mean height of the structure = 6 m; Dimension of the Square…

A: Velocity = 250 Kphmean height of structure = 6mlength of truss = 12mspacing of truss = 3mthe…

Braced cuts

The braced cut is a method of providing lateral support to the soil in foundation trenches, to prevent the trenches from deformation by the caving in of soil and resisting it from moving laterally. During shallow excavation in firm soil, generally, slopes are provided to resist the caving in of soil. During shallow excavation in soft soil and deep excavation, the chances of caving in of soil increase. Hence, it becomes necessary to make a provision to resist the deformation of trenches due to caving in of soil. The braced cut is the method used for such conditions. The excavation using braced cuts is a bit uneconomical as compared to the traditional open-cut excavation method but provides better safety than the cut excavation method.