How To Tie Reinforcements In a Structural Beam



Posted: Monday, September 28, 2009

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A beam is a horizontal structural member in a building. This are made from timber, stone, universal steel and reinforced concrete. They are used to carry a building load across a span with or without a wall below. They span from one wall or column to another. They are made in different sizes depending on the load to be carried and the beam design. They can be formed into rectangular or square shapes. The reinforcements are placed in a form work for concrete to be cast inside to form the structural member.

The reinforcements for the structural beams are either round or twisted bars. The bars should be free from rust or mill scale before being used in any work on site. The tieing wire should be cut into lengths able to do two runs round the steel bars. A bench is prepared to be used for cutting and bending the reinforcements. For the straight runs, bars are measured the full length of the beam and bent at the end by one hundred millimeters. The tieing rings or stirrups, they are cut and bent square or rectangle depending with the beam shape.

A sample beam reinforcement of five meters is made using this procedure. This beam is to be of two by three hundred millimeter size. It shall use twisted bars of sixteen and twelve millimeter diameter bars top and bottom respectively. The four bars are measured five meters first. An extra one hundred and twenty millimeters is added to both ends. The bars are cut and bent to have hooks of one hundred millimeters on both ends. The rings are measured total length and bent into a rectangle which will overlap at the ends.

It is important to note that the finished beam size is two by three hundred millimeters. The rings should allow for concrete cover all round. They are measured less twenty five millimeters all round. The ring length is measured nine hundred millimeters first. It is then bent into four sides of two fifty by one hundred millimeters for the three by two hundred sides respectively. The ends should overlap equally. The four bars are put into the rings spaced at one hundred and fifty millimeters. Tieing wire is used to join all four bars and rings together.

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