 | Albany (N.Y.) - 1910 - 950 стор.
...rigidly fastened by non-conducting fastenings; and where carried over or attached to buildings, must be at least seven' feet above the highest point of flat roofs, and one and a half feet above pitch roofs, and placed so as to avoid ladders of the Fire Department. They... | |
 | 1913 - 242 стор.
...metal conduit, or a waterproof conduit system must be employed. 12. Wires — Continued. c. Must be at least seven feet above the highest point of flat...over which they pass or to which they are attached and roof structures must be substantially constructed. Roof lines will be permitted only under special... | |
 | Harry Cooke Cushing - 1915 - 332 стор.
...waterproof (see p. 96). c. Must be at least seven feet above the highest point of flat roofs (see p. 43) and at least one foot above the ridge of pitched roofs over zvhich they pass or to which they are attached and roof structures must be substantially constructed.... | |
 | Harry Cooke Cushing - 1917 - 374 стор.
...waterproof, (see p. 129). c. Must be at least eight feet above the highest point of flat roofs (see p. 53) and at least one foot above the ridge of pitched roofs...over which they pass or to which they are attached and roof structures must be substantially constructed. Wherever feasible, wires crossing buildings... | |
 | New York (N.Y.) - 1913 - 254 стор.
...metal conduit, or a waterproof conduit system must be employed. 12. Wires — Continued. c. Must be at least seven feet above the highest point of flat...over which they pass or to which they are attached and roof structures must be substantially constructed. Roof lines will be permitted only under special... | |
 | Calvin Franklin Swingle - 1906 - 488 стор.
...covered over their entire surface with at least two coats of waterproof paint. c. Must be at least 7 feet above the highest point of flat roofs, and at...over which they pass or to which they are attached. Roof structures are frequently found which are too low or much too light for the work, or which have... | |
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Service blocks must be covered over their entire surface with at least two coats of waterproof paint. c. Must be at least seven feet above the highest point of flat roofs, and at least one foot above the ridge of pitched roofs over which they pass or... 
