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Friday, September 23, 2016

How to calculate the amount of concrete

As soon as the planning for construction is finished and the forms are arranged, you should examine the type and amount of required concrete.

In order to measure the amount of concrete, just multiply the length of the slab with the width of the slab and divide by the exact number relating the depth from the chart provided under then round up to the next quarter yard.

Defining Mix Design
It is very important to determine the perfect mix for your job. Concrete specifications include Strength (PSI), Slump (mainly the thickness), Fiber Mesh, Chemical Additives as well as a Concrete Pump if needed. Generally 80% of all concrete poured remains 3000 Psi slab mix or 3000 psi pump mix. Other mixes range from 3000 Psi – 5000 Psi mixes, Fine Grout, C-476 Cell and Flowable Fill.

Compressive Strength
Compressive strength is described in psi. If it contains more psi, the strength and durability will improve. Besides, the set time will be lower with the higher PSI. Usually 80% of the slabs contain will 3000 psi.

It is suggested to use a slump of 5-6 inches (+/- 1″) as a slump superior than 6″ may delay the time and one has to wait prior to finishing, specifically in cool weather. Besides, it can enhance the possibility for shrinkage cracking.

Reinforcing Wire Mesh & Fiber MeshWhile curing of concrete, the water in the concrete starts to bleed off and the slab will begin shrinking just slightly. Shrink can lead to cracks because the slab drives across the base material. These cracks are known as shrinkage crack. With use of reinforcement like wire mesh, rebar, or fibers, the cracks can’t be avoided. It can only retain the concrete organized at the time of cracking and stop parting or vertical dislocation.

So, it is very essential to place wire or fiber mesh in the slab.

Fiber mesh is applied to substitute wire mesh in most cases, apart from the first 15’ apron of a driveway. (Verify your local codes) Reinforcing wire mesh is arranged in the slab area before pouring the wire mesh is set on mesh-ups which belong to 2” plastic chairs specifically created for wire mesh. Wire that rests on the ground and is not retained in the middle of the slab by mesh-ups, will not be fruitful for shrinkage cracks. Fiber mesh is included into the mix while pouring and is simpler to use.

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How to calculate the amount of concrete

Published By
Rajib Dey

Thursday, September 22, 2016

Various Types of Prefab Roof Trusses

Now-a-days manufactured roof trusses are used extensively for new homes in USA to form the roof. In traditional framing, the rafters and ceiling joists are used and these are replaced in prefabricated trusses. The trusses are utilized to facilitate the general contractor for building homes which contain more complicated roof and ceiling designs maintaining superior speed and precision.

Fewer unskilled carpenters are employed to build the trusses by incurring low labor costs. These cost savings will minimize the price of almost any new home to be developed. Therefore, prefabricated trusses are mostly suitable for modern builders for their bottom line as compared to traditional roof framing.

Benefits of Prefabricated Trusses
  • Trusses extent longer distances and disregard the requirement for inside load bearing walls.
  • Cost effective as compared to stick roof framing as they are created with shorter lengths containing two by four stock as contrary to the larger framing members associated with traditional rafter and ceiling framing.
  • Trusses are specially created for almost any ceiling or roof combination essential for modern custom homes.
  • The proficient engineers design these trusses to satisfy the roof load and building code requirements.
  • Trusses can generally be formed in one day. Therefore, the construction time minimized significantly. The inside of the new home is uncovered outside weather conditions.
  • Inexperienced carpenters will also be able to construct trusses and less labor costs are required.

The Common Roof Truss
The common truss is acknowledged by its triangular shape and will frame the bulk of any new home truss package. Common trusses include seven primary portions as below:-

Top chord - To which the roof sheathing is used.

Bottom chord - To which the drywall or other finished ceiling is associated.

Bearing point - Where the common truss is created to be placed on the outside bearing walls.

Web supports – These are used to retain the top chord in the exact position, at intermediary points from the highest to the bearing point.

King post - It is applied to facilitate support to the heighest or top of the common truss.

Metal gussets – These are applied where the web supports and king post overlap the top and bottom chord and at the bearing point.

Tail of the truss is applied to produce the eave or overhang and arranges a way to assign soffit and fascia.

To read the complete article visit,

Various Types of Prefab Roof Trusses

Published By
Rajib Dey

Wednesday, September 21, 2016

Concrete Blocks – Manufacturing Process & Benefits

(1) Raw materials utilized in Concrete Blocks :
The primary materials for developing the concrete blocks are aggregates, cement and water. Different types of aggregates are applied with changeable degree of success and they consist of crushed stones, gravel, volcanic cinders, foamed slag, furnace clinker, etc. In order to choose the aggregates, the factors like weight, texture or composition of the unit designed should be considered. The stability, texture and low-cost of the concrete block are subject to the grading of the aggregate cautiously. The cost will be reduced if locally accessible aggregate is used. The ordinary Portland cement is utilized for raw material. The required water should be the normal potable water.

(2) Concrete blocks manufacturing process:
The completely automatic plants are used to develop concrete blocks with superior strength. These automatic machines can made superior quality concrete blocks. But huge capital investment is required to set up & operate these machines. The transportation cost from the production area to the place of actual use will also be reduced for concrete blocks if the manually operated machines are installed at construction site itself.

The following manufacturing process is required for developing the concrete blocks :-

(i) Choice and ratios of ingredients: The primary factor for selecting the ingredients is the desirable strength of the block. If the coarse aggregate is mixed in perfect ratio, the strength of the quantity of cement applied will be superior.

(ii) Blending of ingredients: The aggregates, cement and water should be blended in a proper way. The mixing should be done through a mechanical mixer. While mixing manually, great care is necessary to check that the cement and aggregates are initially blended comprehensively in dry state and the water is then included slowly.

(iii) Positioning and vibration: The mixed concrete material is delivered into the mould box up to the top level and check carefully that the box is filled uniformly. The vibration of concrete is performed until it is set evenly in the mould box.

(iv) Curing: The block is drenched with water after around one day of casting and it should be sustained for at least 7 days and if possible up to 28 days. If the time for curing extends for a prolonged period, the block will be superior.

(3) Benefits of concrete blocks:The application of concrete blocks as a masonry unit is found on several construction sites due to the following benefits:

  • It extends the carpet area of the building due to the small width of concrete block with regards to the brick masonry wall.
  • It offers superior thermal insulation, improved fire resistance and strong absorption capacity.
  • It can save major agricultural land which is applied for manufacturing bricks.
  • The blocks are developed in an efficient manner so that the vertical joints can be taken back automatically and so the time spent for the careful supervision is minimized.
  • The process for developing concrete block masonry is simpler, rapid and stronger as compared to the brick masonry.
  • The shape and size of the concrete block is very accurate and it simplifies the work of a mason.
  • As the numbers of joints are minimized, the time is saved for developing the mortar.
  • The utility will be augmented by creating the reinforced concrete block (RCB) masonry units. The blocks are provided with two holes for arranging perfect reinforcing bars and the structure with RCB units could carefully withstand wind and earthquakes, if so designed. The conventional beams and columns are totally removed and the structure with RCB units will have a superior appearance.
Concrete Blocks – Manufacturing Process & Benefits

Published By
Rajib Dey

Tuesday, September 20, 2016

A position is vacant for Civil Engineer in Australia

The ACOR Consultants Group, a leading group in Australia with a successful multi-disciplinary team of Engineers, Infrastructure Planners, Managers and Designers, is inviting application for a talented Civil Engineer to work in tandem with the Civil Team of the company.

The candidate should have fulfilled the following criteria: 

• 3 to 5 years' post qualification experience in local Civil Engineering design 
• Degree in Civil Engineering 
• Good experience in Civil Engineering design together with stormwater drainage, grading, pavements, roads, site works, bulk earthworks, services infrastructure and coordination 
• Ability to work with a various types of civil design software packages, along with Drains and Music 
• Average knowledge with computer along with AutoCAD and Microsoft Office 
• Should be well versed with 12d but it is not mandatory 
• Sound communication (speaking & writing English) as well as interpersonal skills 
• Advanced organisational, coordination and prioritisation skills
• Expertizes in resolving issue quickly
• Strong determination to accomplish assigned tasks
• Powerful and dedicated work principal
• Capability to perform well independently amidst a team environment 
• A positive, "can-do / will-do" attitude
• Professional personal presentation
• Capability to go by security checks for various organisations
• Driver's license
• Punctual and trustworthy
If you want to make bright career in Civil Engineering, this position is ideal for you. All the Applicants should have permission to work in Australia and is a resident of the country.

In order to apply for the post, please send a mail to with a cover letter & resume. Alternatively one can send application by going through the following link

A position is vacant for Civil Engineer in Australia

Published By
Rajib Dey

Friday, September 16, 2016

Benefits of Grillage Foundation

Grillage Foundation design is mostly suitable for heavy structural loads from columns, piers or beams which are essential to transmit bearing capacity of a soil relatively inferior.

The grillage foundation can easily disperse the load over a broad area of the subsoil. This foundation facilitates to resist deep excavations because the required base area is arranged for the load of the transmission. The foundation depth is restricted from 1m to 1.5m.

The grillage foundation contains two or more tiers of beams placed at proper angles to disperse the load over a extensive area.

Usually, this type of foundation is undertaken toward heavy structure columns piers and stanchions. Grillage is made with steel I I section (R.S.J) placed in single or double large.

The second larger - The number of R.S.J.S and they’re spaced separately based on load of the structure and the bearing capability of the soil.

Ground Improvement with inclusion of Load or enhancing operative stress
When load is delivered on the ground, it is compressed. The range and required time may vary according to the placing of ground particles, on the degree of saturation as well as smooth draining of the soil. If load is delivered for loose and specifically unsaturated fills, it can cause quick settlement.

In order to build a grillage foundation, a trench of the essential width and depth is excavated. The trench surface is leveled and rammed. Above the rammed surface, a cement concrete layer is applied. It should be condensed properly to transform it water-resistant. R.S.J.S contain necessary dimension that are place at consistent gaps. For implanting the lower flanges of the R.S.J.S into the concrete, rich cement mortar is poured. The pipes and bolts are used to attach the R.S.J.S collectively. The bolts are pushed into web of the R.S.J.S.

G.I. pipe pieces are arranged among R.S.J.S, and a long bolt is passed over all the holes and pipes. This will attach the R.S.J.S collectively and develop a solid mass.

Grillage Foundation Types

1.Steel Grillage Foundation
Steel Grillage Foundation is developed with steel beams and it is structurally called rolled steel joists (RSJ), applied in two or more tiers.
2.Timber Grillage Foundation
Timber grillage is undertaken for heavy load wood column or masonry wall. Benefits of Grillage Foundations.

Steel grillage foundation is more useful for contractors as compared to wooden grillage.

Installation Speed – Contractors can make significant savings in time through a grillage foundation.

Suitability – Grillage foundations are mostly used in place of poured concrete and huge time is saved because of smooth installation process.

Costs Reduction – Contractor can obtain discount in cost as there is least possibility for disarrangement of transport infrastructure.

Multipurpose foundation solution – The technology supports various applications.

Benefits of Grillage Foundation

Published By
Rajib Dey

Wednesday, September 14, 2016

Watch The Live Demonstration Of SEMA Timber Construction Software

SEMA timber construction software is created on the basis of a modular structure and it is useful for small tradesman, carpenters and joiners, as well as by large-scale wood-working centres and manufacturers of pre-fabricated houses.

SEMA timber construction software can be applied for creating superior quality roofs and houses. It includes free floor layout plans and roof input options to simplify the process for creating the design of any timber construction.

There are an extensive database comprising interchangeable dynamic component libraries for generally applied timber and steel components together with several constructional details.

It is possible to generate company or project specific standards all through the design phase and save & use them for other projects.

SEMA comes with quick and smooth component definition with special processing and all the essential automatic features to compute the walls aptly.

Intermediate walls can either be generated as cogged log walls or like conventional walls involving timber-framed walls, lightweight walls etc. The adaptable corner macros simply fit to such mingled constructions.

With our efficient master data technology and its sophisticated automatic features, All the layouts & drawings are instantly generated as per needs of the customer through superior master data technology and its automatic features.

SEMA provides a widespread collection of timber fasteners and brackets out of all eminent manufacturers with respect to the standard master data. All the related information for material evaluation is consolidated and the requisite processing of the components is automatically formed.

To deal with any complicated construction, there exist comprehensive libraries with adaptable 3D processing like cuts, notches, drillings and much more are accessible.

Your design gets better with pre-set plan layouts with separate title blocks. The printout is ’live’ from the 3D object as all the modifications are automatically updated in all views instantly.

View the following online demonstration

Published By
Rajib Dey

Monday, September 12, 2016

Brief demo of Clay Block Walling System for building

This construction video highlights the new smart method for modern construction i.e. clay block walling system. This construction method is very popular all over Europe. Clay Block Walling is considered as a superior & strong substitute with regard to conventional building system and materials.

The clay block walling system provides the following benefits :-
  • Construction process will be upto 5 times quicker as compared to conventional block work
  • 95% less water required in construction
  • Application of mortar is minimum with 1 mm bed
  • Achieve Water-tightness with reduced time
  • Contains superior thermal & acoustical power
  • Lighweight with fewer continual strains
  • Less Mortar Contact
  • Unit compression strength 10 n/mm2
  • Outstanding form stability with porotherm structure

Published By
Rajib Dey