Tuesday, December 16, 2008

How to Buy an Ergonomic Desk Chair
Instructions
  1. Research the different ergonomic benefits of a chair. You'll soon find that everything from back support to armrests can make a difference.
  2. Understand the back-support features. Height adjustment supports the lumbar area (lower back). Look for chairs that provide mid-back and upper-back support as well. Tilt mechanism maintains support as you move and recline. It's best to have your back slightly reclined while seated at your desk.
  3. Look at the benefits of the seat pan.Your weight should be distributed evenly on the seat. Look for a rounded or waterfall edge at the front of the seat, which prevents the seat from catching behind the knees and cutting off circulation. Three to four fingers should fit between the seat pan's front edge and the back of the knees. Seat should extend at least one inch from either side of the hips for optimum comfort. Insufficient hip room can make you sit too far forward and not get enough thigh support. Some seat pans adjust for a forward or backward tilt.
  4. Research armrest benefits. Armrests alleviate pressure on the back, but may interfere with lower desks. Look for adjustable width and height to support various tasks, including writing and reading, to ease neck and shoulder tension and to help prevent carpal tunnel syndrome. They should be contoured, broad, cushioned and comfortable.
  5. Get the right fabric. Cloth coverings are less expensive and breathe well, but vinyl or leather upholstery is easier to keep clean. Look for a durable, permeable, ventilated material and check out the mesh Pellicle material in the Aeron chair, which also conforms to the body.
  6. Adjust the height of the chair. Pneumatic levers or gas lifts adjust seating height while in a chair. For optimal posture, thighs should be horizontal with the ground and both feet flat on the floor. The chair's height should allow the wrists to be straight while typing.
  7. Find out the stability of the chair. Look for a chair on wheels that swivels to avoid excess stretching and twisting of your spine. A five-point base won't tip over when you recline. Choose hard casters for carpeting and rubber-coated ones for hard surfaces. A good chair can recline and lock into various positions.
Source By eHow Home @ Garden Editor
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Cases Involving Construction Vehicles (Vibrohammer)

What kind of accident is about to happen?
While extracting steel sheet piles, a worker connects the chuck portion of the Vibrohammer to the steel pile, and starts the machine. Can you predict what's about to happen?



Look what happened !!!
Because the worker turned on the Vibrohammer without securing the hydraulic chuck, the Vibrohammer started shuddering, came off its hook, and fell onto the worker.


Tips for preventing similar accidents
  1. Only start a Vibrohammer after securing the chuck and ensuring that it is being firmly pinched.
  2. Be sure to inspect the safety catch for the hook before starting work.
  3. Only allow personnel certified to operate a vehicle-type construction machine for foundation work to perform pile extraction work.
  4. Undergo preliminary training on the proper methods for operating machinery, such as methods of starting up a Vibrohammer from a remote location.
Soucre By The Japan International Center for Occupational Safety and Health (JICOSH)

Astores Product

Band saws | Auto Wrench Adjusting | Micro Scooter | Eletric Scooter | Buy Cheap Micro Scooter | Canon PowerShot A590IS | Canon PowerShot SD1100IS | Canon PowerShot SD790IS | Canon PowerShot SD790IS | Nikon Coolpix S60 | Diamonds jewelry ring | Digital Advantage Iron | Kodak EasyShare Z1085IS | Fujifilm Finepix S8100fd | Digital Caliper | Samsung Digimax NV11 | Samsung TL34HD Schneider | Samsung TL9 Digital | Power Hand Tools Saws | Metal Band Saws