123
fi g. 8.61
fi g. 8.62
fi g. 8.63
8 - A
Weather Protection for Bridges
Weather protection can increase work effi ciency by protecting workers, material and
equipment against adverse climatic conditions. A weather protection structure allows users
to fasten tarpaulins quickly.
The weight of the weather protection structure and its accessories must be deducted
from the load capacities of the setup. For the weight of the weather protection structure
and its accessories, refer to p. 14 of the Motorized Unit section. Refer also to the Load
Capacities section on p. 94 to avoid overloading the platform. It is mandatory to read
and understand the safety guidelines before installing weather protection.
(optional)
76 13/16" (195,1 cm)
cross brace
Weather protection
support frame
76 13/16" (195,1 cm)
cross brace
Installation
1- Insert the rear post of the support frame in the tube behind the guardrail on the other
side of the bridge (fi g. 8.63).
2- Insert the front post of a support frame in the guardrail pocket of the bridge. Secure in
place with a toggle pin and tighten the pocket bolt.
3- Repeat steps 1 and 2 to install a support frame on the following bridge.
4- Secure the two support frames by installing cross braces (fi g. 8.62) on top and in the
back of the structure.
5- Repeat steps 1 through 4 to install a support structure every 5' (1,5 m).
Weather protection support
frame
76 13/16" (195,1 cm)
cross brace
To wall
Front post
Rear post
Weather protection
support frame
Safety guidelines
1- The use of weather protection is not allowed on a freestanding installation.
2- Weather protection is allowed only in a linked confi guration.
3- It is also important to consider that the combined use of equipment and accessories may
not be allowed on a same installation. For more information about the combined use of
equipment and accessories in an installation, refer to the tables for the combinations
allowed or restricted in linked confi gurations on p. 17 of the Motorized Unit section.
4- An installation requiring the use of weather protection must be tied to the face of the work.
In addition, tie levels must be installed all the way to the top of the installation before
the start of any work and before installing any tarps and screens on the weather
protection structure. Traveling above the last tie point is not allowed in an installation
equipped with weather protection.
5- The use of a motorized unit setup equipped with weather protection is not allowed when
wind speeds exceed 28 mph (45 km/h).
6- A motorized unit setup used for work performed on an open air structure cannot be equipped
with weather protection.
7- When not in use, a platform equipped with weather protection must be brought down to
base level.
8- In a multiple unit linked setup equipped with weather protection, the maximum length
of cantilevers allowed on either side of the setup is 15’ (4,6 m).
Weather protection
is not allowed in an unlinked confi guration.
9- Refer to p. 87 of the Mast and Mast Ties section for the appropriate schedule for the
installation of tie levels for a setup equipped with weather protection.
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