1. Política exterior de la República Popular China (1949 – 1996)
1.1.2. El periodo de inclinación única (1950 – 1955)
1) Power, Air, Powder-Actuated, and Hand Tools
a. Power tools shall not be used if safety equipment, such as shields, tools rests, hoods, and guards have been removed or otherwise rendered inoperative.
b. Employees using tools under conditions that expose them to the hazards of flying objects or harmful dusts shall be provided with the required personal protective equipment.
c. All electrically powered tools shall be properly grounded. Outlets used for 110-volt tools shall be protected by ground fault circuit interruption devices throughout all phases of construction.
d. Gasoline powered tools shall not be used in unventilated areas. Gasoline and other flammable liquids shall be dispensed only from U.L. approved safety cans clearly labeled to identify their contents.
e. Portable grinders will be provided with hood type guards with side enclosures that cover the spindle and at least 50% of the wheel. All wheels will be inspected regularly for signs of fracture.
f. Bench grinders shall be equipped with deflector shields and side cover guards. Tool rests shall have a maximum clearance of 1/8 inch from the wheel.
g. Hoses supplying pneumatic tools shall have couplings secured to prevent accidental disconnection.
h. Air-supply lines will be protected from damage, inspected regularly and maintained in good condition.
i. Air sources supplying hoses exceeding 1/2 inch ID shall be protected by excess flow valves to prevent "whipping" in the event of hose separation or failure.
j. The pressure of compressed air used for cleaning purposes will be reduced to 30 psi or less (does not apply for cleaning of forms, etc.) Six-foot hose extensions with controls for the operator will always be used.
2) Powder-Actuated Tools
Even if permitted by authorities having jurisdiction, powder-actuated fasteners shall not be used in the work place except if approved in writing by JEA. In those cases where such approval is requested, the Contractor shall submit an affidavit from the Contractor's insurance company certifying that the use of powder-actuated fasteners is under the liability provisions of the insurance policy and under the specific circumstances of this project. In addition, the Contractor shall submit an affidavit certifying that the type and utilization of said powder-actuated fasteners shall be in accordance with all applicable law.
a. Only employees who have furnished evidence of having been trained shall be allowed to operate a powder-actuated tool. Additional eye protection shall be worn by all personnel exposed to the use of this type of tool.
b. Tools shall not be loaded until immediately before use. Loaded tools shall not be left unattended.
c. Tools shall not be used in an explosive or flammable atmosphere. Cartridges (powder source) shall be kept separated from all other material.
d. Powder-actuated tools used on a project shall meet all applicable requirements of ANSI-A10.3-1970.
e. Warning signs will be posted throughout the area warning of the use of powder-actuated tools.
3) Procedure:
a. All powder-actuated tools shall be of the low velocity cushioned pistol grip piston type design.
b. Loads, studs, nails, etc. used in powder-actuated tools shall be specifically approved by the manufacturer for use in that tool.
c. Powder-actuated tools shall be so designed that discharging the powering load can only be accomplished when the barrel of the tool is firmly depressed against the working surface.
d. All powder-actuated tools shall be U.L. and F.M. listed.
e. Powder-actuated, piston drive tools shall be so designed that the pistons always remain captive within the tool.
4) Conditions of Use:
In addition to the above requirements the following conditions shall govern.
a. No persons shall operate a powder-actuated tool until they have satisfactorily completed the manufacturer's sponsored training for the particular powder-actuated tool.
b. Powder-actuated tools shall not be used in area's where hazardous accumulations of ignitable dust, gases, liquids, etc. could possibly be present or collect until the area has been proven free from such hazards with appropriate instrumentation.
c. No loads, studs, nails, etc. shall be used in powder-actuated tools for any purpose other than those specifically recommended by the manufacturer.
d. Ear muffs, plugs, or some other equally substantial hearing protection shall be worn by each person within the confines of any enclosed area up to 50 feet from the point of discharge and 25 feet in open outdoor locations.
e. Goggles, face shields, or some other equally substantial eye protection, in addition to safety glasses, shall be worn by each person within 25 feet of the point of discharge.
f. Persons not directly involved with the operation of powder-actuated tools shall not remain within the areas defined in D and E of paragraph 4 above unless granted specific written permission by all Contractors and all applicable provisions of this procedure regarding personal protective equipment have been met.
g. Powder-actuated tools shall not be left unattended unless all loads, studs, nails, etc. have been removed from the tool.
h. All misfired loads shall be disposed of immediately and safely in a manner specifically approved by JEA.
i. All loads except while in actual use shall be stored in a location and manner specifically
5) Maintenance
a. All maintenance work on powder-actuated tools shall be performed by competent and qualified technicians.
b. Maintenance shall be performed as stipulated by the manufacturer's literature.
c. All parts used in maintenance or repair of powder-actuated tools shall be exact replacement parts only.