October 2013
Intermediate to advanced
306 pages
12h 17m
English
Content preview from Estimating for Heating and Ventilating, 3rd Edition
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14 THE PRINCIPLES AND ELEMENTS OF ESTIMATING
Costing Variations', will be charged for at the cost of those additional
works at the time the works are carried out, plus percentage addi-
tions to Labour, Materials, Fares, Allowances, and Cartage. The
percentage additions for such daywork items (and also for hourly
jobbing work rates) are then negotiated between Contractor and
Client on an individual basis.
The Heating Contractor will base his tender upon the work being
done during the normal working hours set out in the 'National
Agreement as to Working Rules and Conditions in the Industry'.
Overtime authorised by the owner, or his agent (the
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