The most used material in the architectural industry is concrete. No modern day construction can be completed without it. It can be customized to get compressive strength or color application, placed in almost any shape or form and finished to resemble masonry, stone and other surfaces. It is durable and virtually maintenance-free. This component is quite easy to work with and installs relatively quickly.
The segment concrete estimating specially deals the basic areas like: concrete materials and placement, formwork, reinforcing, finishing and pre-cast industry. The quantities of concrete usually estimate in measure of cubic yards, as this is how supply companies charge for it. Formwork is taken off in square feet (generally in square feet of area in contact with the concrete as opposed to the actual area of the forms used). Reinforcing is normally taken off in tons of steel. Finishing is taken off in square feet of finished surface. Pre-cast concrete quantities are taken off in either square feet or by the piece, depending on usage and the type of unit being considered.
Concrete estimating is quite an important issue to the estimators as the large amount of total cost is based on the cost of the concrete. That’s why it will be a great help to the estimator to know the probable cost of the total construction.
Posted By:
Debarati Nath
content Writer
Showing posts with label Concrete reinforcing. Show all posts
Showing posts with label Concrete reinforcing. Show all posts
Saturday, February 19, 2011
Tuesday, February 15, 2011
Tips for concrete estimation
Estimating concrete reinforcing costs is a vital phase of a construction. For ascertaining this keep in mind that the reinforcing steel supplier has taken account of all accessories, cutting, bending, and allowances for lapping, splicing, and waste. When no lap specifications are mentioned add 10% to your quantities for lapping, splices, and waste. Also consider 10% waste for welded wire fabric.
Consider the labor unit price for the subdivision of Reinforcing to put in accessories like bean and slab bolsters, high chairs, bar ties and tie wire
Besides checking structural drawings and architectural drawing, also take into consideration the mechanical and electrical drawings for equipment pads and grouting requirements on steel drawings
Deduct small (two square feet or so) while making estimation of the concrete quantities for floor slabs or walls.
One can avail the concrete prices from suppliers near the job site. A volume discount is obtainable which depends on the competition in the area. Don’t forget to add for waste on the whole for slabs and footings on grade.
In the case of compression testing for a project consider a least amount of one test per pour on smaller pours and a smallest amount of one test for each fifty yards of concrete placed. Each test should comprise of a minimum set of three cylinders.
For structural concrete estimation, includes the requisites for concrete additives, curing methods and surface treatments. Also give consideration to climate conditions alongwith hot or cold weather conditions, prerequisites for concrete placing and finishing methods and equipment.
For estimating precisely the components like formwork, reinforcing steel, ready-mix concrete, placement of the concrete mix, finishing of the surface, and curing should also be considered.
In order to finish the concrete surface a good rule of thumb for finishing concrete permits 1,000 S.F. of slab per each cement finisher.
Posted by Rajib Dey
Business Development
rajib@jobs2india.com
The estimating Service
Consider the labor unit price for the subdivision of Reinforcing to put in accessories like bean and slab bolsters, high chairs, bar ties and tie wire
Besides checking structural drawings and architectural drawing, also take into consideration the mechanical and electrical drawings for equipment pads and grouting requirements on steel drawings
Deduct small (two square feet or so) while making estimation of the concrete quantities for floor slabs or walls.
One can avail the concrete prices from suppliers near the job site. A volume discount is obtainable which depends on the competition in the area. Don’t forget to add for waste on the whole for slabs and footings on grade.
In the case of compression testing for a project consider a least amount of one test per pour on smaller pours and a smallest amount of one test for each fifty yards of concrete placed. Each test should comprise of a minimum set of three cylinders.
For structural concrete estimation, includes the requisites for concrete additives, curing methods and surface treatments. Also give consideration to climate conditions alongwith hot or cold weather conditions, prerequisites for concrete placing and finishing methods and equipment.
For estimating precisely the components like formwork, reinforcing steel, ready-mix concrete, placement of the concrete mix, finishing of the surface, and curing should also be considered.
In order to finish the concrete surface a good rule of thumb for finishing concrete permits 1,000 S.F. of slab per each cement finisher.
Posted by Rajib Dey
Business Development
rajib@jobs2india.com
The estimating Service
Wednesday, June 16, 2010
SHOP DRAWING creates maximum benefits for construction companies
The shop drawing is a drawing or collection of set of drawings, diagrams, illustrations, schedules, and other data or information specifically generated or assembled by the contractor, supplier, manufacturer, subcontractor, or fabricator to demonstrate some portion of the work for the approval of architect or engineer.
Unless this task is specifically delineated in a governing agreement, design professionals and engineers should not generate shop drawings, especially in areas relating to the means and methods of construction.
The shop drawing is a graphic or written description of the work drawn to provide the information on behalf of manufacturer or the contractor to describe the fabrication, installation of the items to the manufacturer’s production crew or contractor's installation crews. The information is shown in construction documents.
Within the steel industry a majority of fabricators and detailers prepare shop drawings for pre-fabricated components. This type of components include elevators, structural steel, trusses, pre-cast, windows, appliances, cabinets, air handling units, and millwork.
With the help of shop drawing the steel fabricator gets the ability to fabricate each piece of steel in the building. Shop drawings contain brief information relating to material specifications, sizes, dimensions, welding, bolting, surface preparation, painting requirements, etc.
In a construction project, the number of shop drawings surpasses the number of construction drawings. It is observed that approximately 70 to 80 construction drawings versus 1,000 shop drawings are required in the case of documenting the steel frame for 1,000-ton building (1,000 tons of steel).
As soon as the shop drawings are completed, the mill order can be submitted sooner, the fabrication will be started immediately and the steel can be erected sooner
Concrete reinforcing is another segment in which the shop drawing is required by reinforcing steel fabricators for fabrication of the material. Here the shop drawing is prepared to lists the quantity, sizes, lengths, and shapes of the reinforcing bar. The structural engineers review this information to make sure that sufficient reinforcing is being supplied to be organized for storage and installation.
MEP Engineers also prepare installation and coordination shop drawings for sheet metal ductwork, piping, plumbing, fire protection, and electrical. Shop drawings are not produced by architects and engineers under their contract with the owner.
In brief shop drawings can be explained as below:-
• Comparison information for the architect and engineer
• Notes of changes or alterations from the construction documents
• Information required fabricating the product
• Indication of dimensions needing verification from the jobsite
• Placement or installation information
• Samples
Now a days the drafting software(CAD), 3D steel detailing software and building information modeling software(BIM) are utilized for creation & digital review of the shop drawings in which the multiple copies of each fabricated piece drawing will be reviewed electronically eliminating the paperwork that would total approximately 30,000 sheets of drawings for a construction project.
Rajib Dey
Construction Estimating Service
Unless this task is specifically delineated in a governing agreement, design professionals and engineers should not generate shop drawings, especially in areas relating to the means and methods of construction.
The shop drawing is a graphic or written description of the work drawn to provide the information on behalf of manufacturer or the contractor to describe the fabrication, installation of the items to the manufacturer’s production crew or contractor's installation crews. The information is shown in construction documents.
Within the steel industry a majority of fabricators and detailers prepare shop drawings for pre-fabricated components. This type of components include elevators, structural steel, trusses, pre-cast, windows, appliances, cabinets, air handling units, and millwork.
With the help of shop drawing the steel fabricator gets the ability to fabricate each piece of steel in the building. Shop drawings contain brief information relating to material specifications, sizes, dimensions, welding, bolting, surface preparation, painting requirements, etc.
In a construction project, the number of shop drawings surpasses the number of construction drawings. It is observed that approximately 70 to 80 construction drawings versus 1,000 shop drawings are required in the case of documenting the steel frame for 1,000-ton building (1,000 tons of steel).
As soon as the shop drawings are completed, the mill order can be submitted sooner, the fabrication will be started immediately and the steel can be erected sooner
Concrete reinforcing is another segment in which the shop drawing is required by reinforcing steel fabricators for fabrication of the material. Here the shop drawing is prepared to lists the quantity, sizes, lengths, and shapes of the reinforcing bar. The structural engineers review this information to make sure that sufficient reinforcing is being supplied to be organized for storage and installation.
MEP Engineers also prepare installation and coordination shop drawings for sheet metal ductwork, piping, plumbing, fire protection, and electrical. Shop drawings are not produced by architects and engineers under their contract with the owner.
In brief shop drawings can be explained as below:-
• Comparison information for the architect and engineer
• Notes of changes or alterations from the construction documents
• Information required fabricating the product
• Indication of dimensions needing verification from the jobsite
• Placement or installation information
• Samples
Now a days the drafting software(CAD), 3D steel detailing software and building information modeling software(BIM) are utilized for creation & digital review of the shop drawings in which the multiple copies of each fabricated piece drawing will be reviewed electronically eliminating the paperwork that would total approximately 30,000 sheets of drawings for a construction project.
Rajib Dey
Construction Estimating Service
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