Friday, July 16, 2010
Concrete Chain Saws
A concrete saw is a power tool, that is made for cutting concrete, masonry, brick, asphalt, tile and other solid materials. The concrete saws are powered by gasoline, hydraulic or pneumatic pressure or electric motors. The significant friction generated in cutting hard substances like concrete usually requires the blades to be cooled to prolong their life and reduce dust. Blades are either abrasive or diamond tipped. These concrete saws can be either hand-held, mounted on a stand, or wheeled by hand or motor.
DIAMOND CHAINS
Concrete saw blades are considered to be one of the strongest blades made, as they are associated with the toughest and deepest cutting jobs. These are available in different thickness and width variant. The concrete saws are best for professional users, and suits drainage contractors, plumbers & gas fitters, car wreckers, hire companies, concrete contractors, demolition work etc. You can find various well known brands like Target, Husqvarna, MK Diamond, Partner, Makita, Dewalt, Core Cut, ICS & Imer for concrete chainsaws.
Thursday, July 15, 2010
Benefits of Good System of Roads
- Roads are essential for the economic development of a country. For speedy transportation of commodities a good network of roads is essential.
- Road mileage has nowadays become a symbol of prosperity and advancement of a country.
- During emergencies such as accidents, the injured person can be rushed immediately to a hospital through a good system of roads. In such cases only a sufferer can understand the value of good system of roads.
- A good network of roads enables villagers to transport their commodities to the market speedily and easily.
- A good system of roads helps in the growth of trade and other economic activities all over the country.
- During floods and droughts, the basic commodities can be efficiently rushed from the other parts of the country through a good system of roads.
- A good system of roads serves as a feeder line for other modes of transport and thus helps indirectly in their development.
- For the efficient functioning of the country’s defence force, a good system of roads plays a vital role.
Friday, July 9, 2010
Sunday, July 4, 2010
Why Tension Membrane Structures?
The semi-translucent nature of fabric structures is what makes them a favourite with engineers and architects looking for roofing systems to cover large areas, such as sports stadia or terminals. Fabric structures help in increasing the sustainability quotient of a building in more ways than one. The fabric allows for entry of natural light, while cutting down the transmission of heat. The high reflectivity of the membrane makes it an ideal alternative to glass as a roof glazing system.
Tension membrane structures are usually reinforced using either PVC /Polyester or PTFE based coatings. This makes the fabric structure perform well from the fire performance perspective too. For example, a tension membrane structure with PTFE coating is rated non combustible as per ASTM 136, making them completely safe. Additionally the inert nature of the fabric aids in self-cleaning, a characteristic which makes them perfectly suited for application over large areas. The dependency on artificial lighting is vastly reduced.
The unique properties of light reflectance and transmission also offer exciting possibilities for lighting after dark. Directing lights under the canopy to reflect off the underside is a great way to use uplighters, but more even lighting can be achieved under the fabric by shining lights down on the fabric from above.The thermal insulation achieved with a single layer of either PVC/Polyester or PTFE membrane with a typical weight of around 1200gm per sq metre and a U value of approximately 4.5 W/m2K, is more or less similar to that of glass. White is mostly the preferred colour when it comes to tension membrane structures. This is because with dark coloured membranes, the absorption of heat is very high. Dark coloured membranes can also re-radiate heat. White is therefore the preferred choice in the case of tension membrane fabrics.
Tension membrane structures are usually reinforced using either PVC /Polyester or PTFE based coatings. This makes the fabric structure perform well from the fire performance perspective too. For example, a tension membrane structure with PTFE coating is rated non combustible as per ASTM 136, making them completely safe. Additionally the inert nature of the fabric aids in self-cleaning, a characteristic which makes them perfectly suited for application over large areas. The dependency on artificial lighting is vastly reduced.
The unique properties of light reflectance and transmission also offer exciting possibilities for lighting after dark. Directing lights under the canopy to reflect off the underside is a great way to use uplighters, but more even lighting can be achieved under the fabric by shining lights down on the fabric from above.The thermal insulation achieved with a single layer of either PVC/Polyester or PTFE membrane with a typical weight of around 1200gm per sq metre and a U value of approximately 4.5 W/m2K, is more or less similar to that of glass. White is mostly the preferred colour when it comes to tension membrane structures. This is because with dark coloured membranes, the absorption of heat is very high. Dark coloured membranes can also re-radiate heat. White is therefore the preferred choice in the case of tension membrane fabrics.
Friday, July 2, 2010
Cost Engineering and Quantity Surveying
Cost Engineering and Quantity Surveying have similar and highly overlapping functions. Quantity Surveying relates more to building design and construction, while Cost Engineering relates more to engineering projects and processes. However Cost Engineers and Quantity Surveyors commonly work in both areas. Cost Engineering and Quantity Surveying differ primarily in the route taken to professional qualification, not to any substantive difference in the two professions. Project Management overlaps both Quantity Surveying and Cost Engineering in the project cost management area to some degree but most Project Management functions are quite different from those of Cost Engineering and Quantity Surveying.
The following document summarizes the conclusions of discussions held at ICEC International Congresses and endeavors to compare the similarities and differences between the three professions, in terms of cost management matters only. A definition of entire scope of Project Management activity is not intended, nor should it be inferred, from this document.
Cost Engineering (CE) and Quantity Surveying (QS)
Functions.
To provide independent, objective, accurate, and reliable capital and operating cost assessments usable for investment funding and project control.
To analyze investment and development for the guidance of owners, financiers and contractors.
CE and QS include:
These are typical functions of the CE or QS but not all practitioners in the field perform all of these functions. Many specialize in a limited number of these functions.
The CE or QS provides information by:
These are interdependent and feed back to each other. They include:
The following document summarizes the conclusions of discussions held at ICEC International Congresses and endeavors to compare the similarities and differences between the three professions, in terms of cost management matters only. A definition of entire scope of Project Management activity is not intended, nor should it be inferred, from this document.
Cost Engineering (CE) and Quantity Surveying (QS)
Functions.
To provide independent, objective, accurate, and reliable capital and operating cost assessments usable for investment funding and project control.
To analyze investment and development for the guidance of owners, financiers and contractors.
CE and QS include:
- - estimates of capital or asset costs including development costs;
- - estimates of operating and manufacturing costs through an asset's life cycle;
- - risk assessment and analysis;
- - trending of scope and cost changes;
- - decision analysis;
- - financial analysis (eg, net present value, rate of return, etc);
- - project cost control;
- - appraisals of existing assets;
- - project analyses, databases, and benchmarking;
- - planning and scheduling;
- - siting studies, etc.;
- - productive and investment needs assessment;
- - facility management needs assessment;
- - project feasibility and budget assessment;
- - cost management;
- - procurement management;
- - contract administration;
- - whole-life appraisals;
- - quality audits;
- - value management;
- - dispute resolution.
These are typical functions of the CE or QS but not all practitioners in the field perform all of these functions. Many specialize in a limited number of these functions.
The CE or QS provides information by:
- estimating costs and analyzing risk,
- - trending and controlling costs and assessing design, and
- - documenting costs.
These are interdependent and feed back to each other. They include:
- - analyzing cost,
- - assessing design,
- - assessing risks,
- - trending costs,
- - advising clients,
- - managing cash flows,
- - preparing feasibility analyses, and
- - assessing life-cycle costs.
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