Rebar Estimation

 

The construction industry similar to any other industry follows the economy, and as the economic dip continues, any recovery in construction looks far off. Thus, the projects that are available for bidding have become rarer and more competitive as companies look to provide work for their personnel and maintain sustainable income. Rebar estimation forms an important part of the services offered by Mercury Rebar to all esteemed clients. We produce precise and steadfast estimates for bidding after thoroughly understanding the requirements of our clients. As an input from the clients we take the structural GA drawings and the Reinforcement Detailing Instructions. After this our expert team work out for each bar taking the weight and provide a summary of the tonnage for the entire job. Our output is in the form of an Estimation Take Off Report to the client, which is a simplified bar bending schedule as an excel document that is adequate enough for the purpose of bidding.

  • Residential & Commercial High Rise Buildings
  • Parking Structures
  • Recreation Centres
  • Industrial & Power Plant Structures
  • Flyovers & Multiplexes
  • High Rise Hotels

 

Rebar Estimation Procedure

 

Rebar estimation process is executed by our specialists who study a set of contract drawings and specifications, and with the knowledge they possess of construction and reinforcing bars, they can develop a list of quantities of material which they believe are needed to build the structure under consideration. From this information, our experts develop the required pricing, which can be used as a bid to be submitted to the general contractor. It’s vital that the contract drawings and specifications provide complete detailed information about the reinforcing bars. The estimate is nothing but a line-by-line take-off and the entire details will generally insure a more precise estimate. When the estimator needs to guess and make assumptions, there could be a compromise on the estimate’s quality. A sensible estimator will tend to figure quantities on the safe side when there is a question of what is actually required. Of course, this can increase the amount of the material quotation. Another option the estimator has is to get in touch with the architect or engineer and attempt to clarify that which is unclear. This can be a really trying experience as answers are not always impending. The estimator generally works under a tight guideline and need to carry on and finish the estimation process. Of course, there is a way through which the bid can be qualified and limited to the assumptions made, but this can lead to the bid being rejected as being nonresponsive. One feature of preparing quantity estimates for fabricated reinforcing bars is the way in which charges for extras might be added to the base price. The principal extras are for size, grade, quantity and branding.

Mercury Rebar’s prowess relies on its consistency for delivering high quality, precise estimation addressing the entire scope of any type of project. Further, our ability and proficiency let us meet stiff targets without any strain and make completion of large projects a reality within specified time. By having an outstanding rebar estimation team, we are able to deliver every project hassle free and on time.

Bar Bending Schedule

Bar Bending Schedule or diagram is the extended presentation of cut and bend bars as per the design requirements of reinforcement detailer. It’s a list of reinforcing for the tasks to be carried out, it lists location of the bar, bar mark, diameter of bar, number of pieces, length before bending, shape code and several lengths of the bent shape and it gives perfect idea to the maker where to bend it. Going by the schedule along with the structural drawings, the workers can install the structural correctly.

Advantages of Bar Bending Schedule

  • The cutting and bending of reinforcement can be done at factory and transported to site upon the availability of Bar Bending Schedule. This enhances faster execution at site and lessens the time of construction and cost due to fewer requirements of workers for bar bending. With accurate bar bending schedule, one can avoid the wastage of structural reinforcement up to 5 to 10% thus saving the cost for project.
  • When BBS used for Fe 500, one can save more structural reinforcement up to 10% compared to Fe 415
  • It offers better estimation of reinforcement structural requirement for each and every structural member which can be used to compute overall reinforcement requirement for the entire project
  • It enhances the quality control at site as reinforcement is offered as per BBS which is made using the provisions of respective detailing standard codes
  • There is a general propensity to group slabs and beams in the usual design methods. In BBS, it’s essential to detail every member separately to account finer geometry and different forces coming on the structure in the modern design methods.
  • BBS is very much beneficial during auditing of reinforcement and offers checks on theft
  • One can use BBS for the cutting and bending of reinforcement and making skeleton of structural member before it can be placed at the position required. Other activities such as PCC, excavation etc. can proceed side by side with this activity. This propels reduction in time of construction and also the overall project activity management becomes easy. It also becomes useful in preventing any damages due to construction time overrun.
  • BBS makes life easy for site engineers to validate and approve the bar bending and cutting length during review before placement of concrete thus helping in better quality control
  • It lets easy and quick preparation of bills of construction works for clients and contractors
  • Mechanization of cutting and bending of reinforcement can be done with the use of BBS, thus lessening the time and cost of project and reliability on skilled labour requirement. It also enhances the reliability on precision of bar cutting and bending

Generally, civil engineers who have expertise in RCC structure are the ones to prepare the BBS. Preparing BBS requires more time for calculation compared to common quantity take offs. These calculations comprise of cutting length, deduction of bend allowance within cutting length and summary of weight of each size separately. Mercury Rebar has all the required expertise to prepare the BBS as per the requirement of the project and in accordance with the inputs given by the client.

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