S-2.1, r. 4 - Safety Code for the construction industry

Section 3.24.19 Disposition versions

2012-09-01

3.24.19. Erection of an open web steel joist: Erection work of an open web steel joint must be carried out in accordance with the following standards:

(1)  before a hoisting apparatus lands the joist and in order to ensure the lateral stability of the joist during its placement, erection bridging must be installed, if applicable, in accordance with the joist manufacturer’s plan. Bridging must be of the bolted diagonal type and the number of rows indicated in the plan must at least comply with the following specifications:

Joist length Minimum number of rows

(a)  less than 12 m None

(b)  12 m to 18 m 1 row

(c)  18 m to 30 m 2 rows

(d)  30 m or more 4 rows

(2)  as soon as a joist is placed, each joist end must be bolted using at least one bolt; and

(3)  no load may be placed on the joist as long as all the rows of bridging have not been secured and each end of row has not been anchored, except if the joist manufacturer specifies on the joist connection plan the measures to be taken to do so and those measures have been complied with.

Joists may be hoisted and landed in bundles on the steel structure if they do not require erection bridging and are put in place one after the other to prevent them from falling off their supports.

O.C. 391-2011, s. 2.