Operation
Sawing
C
onditions
• Determine the position of pipes and cables in walls, floors and ceilings.
• Where does the cooling water used for sawing flow to? (Think about
water damage to the electrical supply).
Securing the site
• See “Chapter 1” Workplace and danger areas
.
Securing cutouts
Secure cutouts from walls and especially from ceilings and floors by
suitable means, e.g. crane, supports, etc.
Check the weight of concrete. (1
ft
³ =
150lbs
)
Decide on position and sequence of the cuts
Position of cuts
Find out about the concrete or masonry to be sawed:
– Where does the reinforcement run?
– Is the concrete heavily or lightly reinforced?
Cut across the reinforcement if possible.
Cutting sequence
Decide on the sequence of cuts before starting work. For example, for a
window cutout carry out the bottom cut first, then the side cuts, and finally
the top cut.
Fig. 6-2
Sequence of cuts for a window cutout
Information
The wrong sequence of cuts can lead to jamming of the bar or damage
to the chain.
1
2
3
4
27
