Teledyne 6712FR manual Traffic Protection, Falling Objects, Removing the Covers

6712FR Refrigerated Sampler

Appendix C General Safety Procedures

overcome or injured. One man cannot lift an unconscious man out of a manhole. The persons stationed at the surface should also function as guards to keep people and vehicles away from the manhole opening. To avoid a serious injury, a person should not be lifted out of a manhole by his arm unless it is a dire emer-

		gency.
		When more than one person must enter a manhole, the first
		person should reach the bottom and step off the ladder before the
		next one starts down. When two men climb at the same time, the
		upper one can cause the lower one to fall by slipping or stepping
		on his fingers.
C.1.5	Traffic Protection	In addition to traffic cones, markers, warning signs, and barri-
		cades, a vehicle or a heavy piece of equipment should be placed
		between the working area and oncoming traffic. Flashing
		warning signals should be used to alert drivers and pedestrians.
		Orange safety vests should be worn by personnel stationed at the
		surface when the manhole is located in a vehicular traffic area.
C.1.6	Falling Objects	All loose items should be kept away from the manhole opening.
		This applies to hand tools as well as stones, gravel and other
		objects.
C.1.7	Removing the Covers	Manhole covers should be removed with a properly designed

hook. Use of a pick ax, screwdriver, or small pry bar may result in injury. A suitable tool can be made from 3/4-inch round or hex stock. Two inches of one end should be bent at a right angle and the other end should be formed into a D-handle wide enough to accommodate both hands. Even with this tool, care must be exer- cised to prevent the cover from being dropped on the toes. The 2-inch projection should be inserted into one of the holes in the cover, the handle grasped with both hands, and the cover lifted by straightening the legs which have been slightly bent at the knees.

C.1.8 Other Precautions Other precautions which should be taken when entering a manhole are:

•Wear a hard hat.

•Wear coveralls or removable outer garment that can be readily removed when the work is completed.

•Wear boots or nonsparking safety shoes.

•Wear rubberized or waterproof gloves.

•Wear a safety harness with a stout rope attached.

•Do not smoke.

•Avoid touching yourself above the collar until you have cleaned your hands.

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