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Compression and tension occur in opposite side of the footing relative to position. So, at a spread ftg or pile cap, the top reinforcing will be in tension and the bottom compression. At the midspan, between spread ftgs or pile caps, the tension will occur in the bottom and compression in the top. Rebar lap splices usually occur in the compression points, so bottom lap at spread ftgs and top at midspans. Also, details will typical have additional rebar at the points of maximum tension so at the top over supports and bottom at midspans. This though should be confirmed with the Engineer of Record on any project, as assumptions can change project to project. But this is the general concept.
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What is the code size for a concrete column in a 2 story house in florida USA?
use 400x400mm with a rebars of 8-16mm dia. for 4-5m span.
What are advantage of compacting concrete using a steel rod?
I think you are talking about embedding steel rods (rebars) in concrete, right? This would make the concrete much stronger. It is called reinforced concrete, and you can make all sorts of structures with it, something that you can't do with ordinary concrete. Though, I am not even sure anyone is using non-reinforced concrete nowadays.
What is qst?
QST rebars:The acronym 'QST' stands for 'Quenched & Self Tempered' reinforcement steel bars. In hot rolling mills the steel bar is passed through a high pressure water quenching system whereby only the peripheral temperature is drastically reduced while the core remains largely unaffected. On leaving the specially designed quenching system, the core heat tempers the peripheral martensite that was formed during quenching. This results in a rebar with a soft core and a uniform hardened tempered martensite periphery - a rebar with high yield strength but with extremely good ductility. Such rebars are ideal for use in high hazard seismic areas.These bars are produced in bar rolling mills by use of the globally proven and accepted THERMEX Quenching System and Technology of M/s HSE Germany.In the Indian Region comprising India, Nepal, Bhutan, Bangladesh, Myanmar, Pakistan and Sri Lanka, M/s H&K Rolling Mill Engineers Pvt. Ltd., Mumbai (H&K India) have been given perpetual exclusive rights by HSE Germany to Licence, sell, market, install and commission the unique THERMEX Quenching Systems. As on 1 April 2013, H&K India has received orders for nearly 200 Thermex Systems to be set up in rolling mills - of which about 29 were under excecution. The installed capacity of Thermex QST rebars in India alone is over 14 million tonnes (65% market share). Each Thermex Licensee in Indian Region is subject to strict quarterly audit. Qualified QST engineers visit each Licensee to ensure that the rebar properties are as per the strict standards laid down by HSE Germany and H&K India besides meeting the Standrards of the country.The Thermex 500 QST rebar meets most global standards and codes and is widely accepted by leading users of rebars because of the uniform properties obtained from the various Thermex Licensees.In India, the registered trade mark/name THERMEX is owned by H&K India as per permission given by HSE Germany.Unfortunately, in India, these QST rebars are incorrectly referred to as 'TMT' bars. 'TMT' is an acronym for Thermo-Mechanically Treatment even though no mechanical treatment is involved in the process. This has lead to a number of improper 'TMT' rebars being sold in India with non-uniform tempered martensite periphery at the rebar cross-section - encouraged by this non-uniformity "not being a ground for rejection" as per latest rebar code IS:1786-2008!For further information you may contact R. K. Markan at handk.india@gmail.com
What is the TMT 550 grade steel lap length?
Lap Length is the length overlap of two rebars tied to extend the reinforcement length. Lap Length of about 50 times the diameter of the bar is considered safe. Let us understand the term “lap length” with an example: suppose there is a need to build a 200ft tall structure, say column. We know that for convenience of transportation, standard length manufactured are upto 12 metre only, hence to strengthen the structure overlapping of two or more bars are done side by side upto the design length. Reason for doing so is the required tension forces that is needed to transferred from one bar to the other. So if diameter of tmt is A then lap length will be 50A. If both diameter is same. Now coming to question, lap length of tmt 550 grade is usually done where minimum bending stress is encountered. We at Shree Ji Steel offer wide range of sizes and grade for various product range which can be checked from our website Shree Ji Steel Corporation.
What is the difference between TMT Steel bar and deformed steel bars?
Tor steel is completely type of steel for which steel composition is decided. Unttill TMT is a coating only on upper surface to prevent corrosion. So we can say it is basic differance as we know.
What can you reinforce concrete with?
There are different forces on a materials such as Compression and Tension. Compression is pushing a material together. Tension is pulling a material apart. Concrete has good strength in Compression, but is weak in Tension. The steel reinforcement improves the resistance to tension of the concrete.
Do all concrete slabs need rebars?
When the slab is loaded and force applied to it, the top of the slab directly under the load will be put in compression. However at the bottom of the slab. the concrete will pull itself in tension. Put the ends of your fingers together than flex your wrist up. You will feel the pressure at the top of your fingertips and you will see a gap open at the bottom. That is what is happening in a slab. Concrete is strong in compression, poor in tension. Rebar, or steel, is the opposite. By combining the two, you develop a product that is superior and complimentary to the strengths and weaknesses of the individual materials.
What is stirrups in beam?
As it has been explained to me there only purpose is to support and separate the rebars in their respective locations. Other than that, they are doing the same thing as wire mesh... displacing concrete.
Why rebars are capped?
To prevent injury.
What is the difference between lean concrete and mass concrete?
Mass concrete is concrete cast without Rebars. They are good in compression and are mostly used for the construction of gravity structures such as Dams. While reinforced concrete have reinforcement bars in them, which increases the tensile strenght of the concrete.
What are the differences between the mass concrete and reinforced concrete?
Mass concrete is concrete cast without Rebars. They are good in compression and are mostly used for the construction of gravity structures such as Dams. While reinforced concrete have reinforcement bars in them, which increases the tensile strenght of the concrete.
What words have letters b r r e a s?
rebars
Comparison between BS and ASTM specification for steel rebars?
C 11 specification
What is the constant value from cubic meter of concrete to determine weight of rebar?
There is no constant value for the ratio of the rebars and concrete volume. The rebars depends on the structural designer's safety factor and the factors affecting the framing like wind, earthquake and soil.
What type of material is reinforced concrete?
Concrete is composed of cement and other cementitious materials such as fly ash and slag cement, coarse aggregate made of crushed stone, fine aggregate such as sand, water, and chemical admixtures. In reinforced concrete, steel is introduced in to the concrete. In plain concrete, no steel reinforcement is introduced. Generally tensile and compressive strength is taken by reinforced concrete and only compressive strength is taken by plain concrete
In two way slab which rebars has a wider spacing the middle strip or the column strip?
Middle strip
What the unit weight of the rebars 16mm?
The unit weight of 16 mm reinforcement is 1.58 kg/m
