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31
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On
16. Anchor the upper tie a maximum distance of 18 ft (5.5 m) from the
lower tie. (Fig 3.15).
17. When possible, it is recommended to tie at the top of the highest mast
to increase platform rigidity.
ADDING HEIGHT (CONT’D)
Important:
For a Single Mast Tied configuration, you
shall not do work above a tie. For a Twin Mast Tied
configuration, it is allowable to work while the platform
is a maximum of 5 ft (1.5 m) above the lower tie.
Upper Tie
Lower Tie
18 ft ( 5.5 m)
max
tie spacing
Max Platform Height above
Lower Tie while doing work:
Single Mast Tied: 0 ft (0 m)
Twin Mast Tied: 5 ft (1.5 m)
3
ERECTING THE SYSTEM
