Some useful tips to design a T-beam with the use of limit state method

This construction video briefly describes how to create the design of t-beam with the use of limit state method.

A T-beam (or tee beam) is applied in construction extensively. It is a structural element developed with reinforced concrete, wood or metal. It contains a t-shaped cross section that is formed by a stem and a flange of reinforced concrete or rolled metal.

The top of the t-shaped cross section acts as a flange or compression member in withstanding compressive stresses. The web (vertical section) of the beam underneath the compression flange contributes to withstand shear stress and offer better separation for the coupled forces of bending.

A T-beam has the capacity to tolerate large loads by providing resistance in the beam or by internal reinforcements. It operates similar to singly reinforced beam.

In order to enhance the structural strength of a T-beam, just utilize an inverted T-beam together with a floor slab or bridge deck linking the tops of the beams. If it is accomplished perfectly, the slab performs as the compression flange.

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Published By
Rajib Dey
www.constructioncost.co
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Variations among Warren Truss, Howe Truss and Pratt Truss

In engineering, a truss belongs to a structure that contains two-force members only. The members are arranged in order that the truss can act like a single object. The truss facilitates the structures to transmit weight to its foundations and anchors securely.

The members of truss are only dependent on axial compression and tension and not on bending moment.

The truss employs a web of triangles which are attached in order that pressure and tension are used to the points of the corners of every triangle to make them stable for providing support to structure. By associating a wide array of trusses collectively, significant amount of weight can be transmitted securely to load-bearing beams, wall or to the ground directly.

Generally, the trusses are categories as Warren truss, Pratt truss and Howe truss.

Warren truss is supported with a set of isosceles triangles or equilateral triangles. The verticals are included with Warren Truss with the purpose of raising the span length of the truss bridge.

Pratt truss is defined by its diagonal members (excluding the end diagonals) which are sloped down towards the middle of the bridge span. This type of structural arrangement is based on when external loads tension is caused in diagonal members whereas the vertical members manage compressive forces. Therefore, thinner and lighter steel or iron is applied as materials for diagonal members with the purpose of building up a more well-organized structure.

The design of Howe truss is contrary to that of Pratt truss in which the diagonal members are sloped in the direction contradictory to that of Pratt truss (i.e. slanting away from the middle of bridge span) and as such compressive forces are formed in diagonal members. Therefore, it is not cost-effective to employ steel members to deal with compressive force.

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Published By

Rajib Dey

www.constructioncost.co

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