=101. Cost.=—The cost of the =gas-fitting= may be approximately
figured as about 3 per cent. of the cost of the building. The cost of
labor alone varies from about one-fourth to one-seventh of the cost
of materials. The better the grade of fixtures, the lower will be the
ratio, provided there is no excessive ornamentation requiring much time
to put in place, as the cost of the labor is about the same for cheap
fixtures as for more costly ones.
=102.= Estimate piping the same as for plumbing.
Allow for meter, permits, tapping gas main, etc.
Figure each gas fixture separately set up in place. The owner usually
makes a selection of fixtures from the manufacturer’s catalog. Allow
for shields, fireguards, etc. in places where there is danger of fire.
Figure gas grates, gas stoves, gas heaters, etc. separately. Where the
gas pressure is very high or unsteady, allow for a pressure regulator.