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It allows the girders to be lighter. If you took a solid piece of steel in a square shape and exposed it to stressed, you would discover that the stress in the metal is on the top face and the bottom face. The middle sections do not add to the structural strength of the beam, they simply add weight.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoIn modern girder steel bridges, the two most common shapes are plate girders ... A beam may be made of concrete or steel - many shorter bridges.
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Difference of girder and joist girder?
girder is the main horizontal beam . the joists which are usually smaller, are connected to the girders and are supported by the girder.
What vertical member are used to support girders and beams?
Vertical members are called posts. often they have braces on either side of the post to support the weight as well.
What is difference between pre tension and post tension precast girders of bridge?
A simple explanation: PRE tensioned- cables are tensioned, and the concrete is cast around it. The tensioning is done BEFORE casting the concrete (PRE = before). POST tensioned- cables are placed inside of ducts or are greased to prevent bonding to the concrete, the concrete is cast around the cables, and then the cables are tensioned after the concrete has reached a desired strength. The tensioning is done AFTER the concrete is cast (POST = after).
What is concrete shuttering?
A wooded frame is made into a shape, for example a stair case, and then the concrete is poured into the frame. After the concrete has set, the wood/shuttering is removed, leaving a solid concrete shape. Steel bars are added into the concrete as it sets to give the shape more strength. Vague description but that the general idea of it, hope it helped.
What is a wrot formwork?
Wrot Formwork is fair finish surfaces made up of steel or iron. Formwork is when wooden boards and bolts are used to shape concrete while it is setting.
What was twin towers made of?
Steel Girders
What are steel girders made of?
the material used is called sandpaper
What is iron used for in Scotland?
Irn Bru. It made in Scotland from girders, ya Ken?
Did the invention of steel girders durable plate glass and passenger elevations revolutionize the size and shape of American cities after the Civil War?
yes it did
Why the precast girders are used instead of reinforced cement concrete girders?
becos precast girders are not cast in -site and therefore faster. they also available in standard size.
Why iron girders used at bridge's construction?
They are not. Steel girders can be used because of their strength and are easily manufactured
What is the shape of solid steel?
Solid steel can be any shape that is required by the customer. In a molten state it can be poured into moulds at the foundry. White hot, it can be put through rollers to produce girders, or rolled into flat sheets, and trimmed to size under presses, and so on.
What is the use of gantry girders?
advantages of welding machine
What has the author J Yinh written?
J. Yinh has written: 'Study on fatigue of hybrid plate girders under constant moment' -- subject(s): Fatigue, Plate girders
What can a snap head rivet be used for?
Girders in buldings and bridges
What has the author Ralph Reason Mozingo written?
Ralph Reason Mozingo has written: 'Influence line expressions for continuous beams' -- subject(s): Continuous Girders, Girders, Continuous, Influence lines
What is Rigid frame bridge?
a bridge where the piers or towers are connected to the girders
