Tuesday, April 10, 2007
You may want to build up a new driveway or may want to upgrade one, you can check out the options available for driveway materials.
The materials you use to build your driveway influence its cost, stability and aesthetic appeal. From functional concrete or asphalt to striking paving, ecological grass pavers to easy gravel, there's a driveway material that is suitable to every site and situation. Following are the popular options plus tips on resurfacing and sealing.
Brick paving
A driveway paved with new or recycled bricks is durable and more attractive. Particularly apt for driveways are herringbone designs, regularly flanked by header courses in different tones. Herringbone sloping at 45 degrees to the house turns the driveway into a trait (at 90 degrees, it's more modest). Combine herringbone with rings of discontinuous header and stretcher courses to shape striking radial designs appropriate for semi-circular driveways. On the downside materials and labor could as well be expensive.
Concrete pavers
Square or rectangular pavers in stone or concrete make good-looking, tough driveways, well matched to driveways, which are double as entertaining areas. Pavers come in assorted stones, forms, shades and other sizes, enabling a huge mixture of looks. Fill gaps among pavers with sand, fine pine woof or gravel. Stone driveways could be high-maintenance (for defense, softer stone pavers need top-grade sealer, often re-applied) and costly.
Asphalt
This hardwearing combination of tar, gravel and concrete is lucrative and low-maintenance, and as well require minimal cleaning. Easily laid by contractors, it's built for last. Asphalt's dramatic blue/black hue could also add great impact and set off strong modernist facades. Understand that asphalt could be risky by cracking as it's oil-ased and hence more flexible than concrete. It also grabs the heat in summer.
Timber
Eco-friendly, commercial and strong, timber driveways merge well with bush garden surrounds. Generally, treated sulk joists and floorboards are laid on or over compressed sub-grade or sub-base. The timber finally weathers to an attractive silvery hue. Timber driveways could be intelligent solution to rough sites as planks could be laid over deep dips. Timber needs usual treating and fastens and planks might finally need replacing.
The materials you use to build your driveway influence its cost, stability and aesthetic appeal. From functional concrete or asphalt to striking paving, ecological grass pavers to easy gravel, there's a driveway material that is suitable to every site and situation. Following are the popular options plus tips on resurfacing and sealing.
Brick paving
A driveway paved with new or recycled bricks is durable and more attractive. Particularly apt for driveways are herringbone designs, regularly flanked by header courses in different tones. Herringbone sloping at 45 degrees to the house turns the driveway into a trait (at 90 degrees, it's more modest). Combine herringbone with rings of discontinuous header and stretcher courses to shape striking radial designs appropriate for semi-circular driveways. On the downside materials and labor could as well be expensive.
Concrete pavers
Square or rectangular pavers in stone or concrete make good-looking, tough driveways, well matched to driveways, which are double as entertaining areas. Pavers come in assorted stones, forms, shades and other sizes, enabling a huge mixture of looks. Fill gaps among pavers with sand, fine pine woof or gravel. Stone driveways could be high-maintenance (for defense, softer stone pavers need top-grade sealer, often re-applied) and costly.
Asphalt
This hardwearing combination of tar, gravel and concrete is lucrative and low-maintenance, and as well require minimal cleaning. Easily laid by contractors, it's built for last. Asphalt's dramatic blue/black hue could also add great impact and set off strong modernist facades. Understand that asphalt could be risky by cracking as it's oil-ased and hence more flexible than concrete. It also grabs the heat in summer.
Timber
Eco-friendly, commercial and strong, timber driveways merge well with bush garden surrounds. Generally, treated sulk joists and floorboards are laid on or over compressed sub-grade or sub-base. The timber finally weathers to an attractive silvery hue. Timber driveways could be intelligent solution to rough sites as planks could be laid over deep dips. Timber needs usual treating and fastens and planks might finally need replacing.
posted by Land Clearing
@ 8:22 PM
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Thursday, April 5, 2007
Excavation and trenching are known as the most unsafe construction operations. Excavation is defined as any man-made cut, cavity, land clearing or trench in the earth's surface formed by earth removal. A trench is defined as a narrow alternative excavation, which is deeper than it is wide, and is not wider than 15 feet (4.5 meters).
Dangers involved in Excavation and Trenching
Cave-ins have the maximum risk and are much more probable than other types of excavation associated accidents to result in worker fatalities. Other possible dangers include falls, falling loads, harmful atmospheres, and other incidents concerning mobile equipment. Trench gives way cause dozens of losses and hundreds of harms each year.
Common Excavation and Trenching Rules
Dangers involved in Excavation and Trenching
Cave-ins have the maximum risk and are much more probable than other types of excavation associated accidents to result in worker fatalities. Other possible dangers include falls, falling loads, harmful atmospheres, and other incidents concerning mobile equipment. Trench gives way cause dozens of losses and hundreds of harms each year.
Common Excavation and Trenching Rules
- Heavy equipment tools should be kept away from trench edges.
- Surcharge loads needs to be at least 2 feet from trench edges.
- One should not work under raised loads.
- Test for low oxygen, dangerous fumes and other toxic gases.
- Inspect the trenches that follow a rainstorm.
- You should know the location of underground utilities
Self protection
You should not enter an unprotected trench! Trenches 5 feet (1.5 meters) deep or superior need a protective system unless the excavation is made totally in stable rock. Trenches 20 feet deep or better require, which the protective system be designed by an expert engineer or be based on tabulated data prepared and/ or approved by a registered expert engineer.
Protective Systems
There are various kinds of protective systems available. Sloping comprises cutting back the trench wall at a slant inclined away from the actual excavation. Shoring needs installing aluminum hydraulic or any other kinds of supports to stop soil movement and cave-ins. Shielding defends workers by making use of trench boxes and also other types of supports to stop soil cave-ins. Designing a protective system could surely be compound because you have to think about many factors: soil classification, depth of cut, water soil, changes in the weather or climate condition, surcharge loads (e.g., spoil, other tools to be used in the trench) and other operations in the surrounding area.
posted by Land Clearing
@ 10:37 PM
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