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

Section 6.6.2 Disposition versions

2012-09-01

6.6.2. Posts, joists and stringers:

(1)  the minimum length of the protrusion of a joist supported on a stringer shall not be less than 300 mm, unless the joist is affixed by ties, in which case the joist shall be supported at least on the full width of the stringer.

(1.1)  on a same linear section of the perimeter of the shoring of the framework of a slab, the length of the protrusion of the joists and stringers shall be equal.

(2)  Stringers shall be long enough to be supported by at least 3 posts.

(3)  The continuity of stringers shall be ensured in one of the following ways:

(a)  by a piece of wood 50 mm in nominal thickness and as wide as that of the stringer or the head of the telescopic jack, whichever is the smallest, and long enough to ensure solid attachment to the 2 stringers when the posts are placed immediately below the joint of the stringer and when:

i.  telescopic jacks with flanges of 100 × 100 mm or 100 × 150 mm are used; or

ii.  stringers of 100 mm wide are used;

(b)  by a part of the same section as that of the stringers nailed to the latter and of sufficient length to be supported by at least 2 posts when the posts are placed on each side of the joint and not at the extremities of the stringers;

(c)  by the flange of the telescopic jack if the dimensions are sufficient to do so, that is when:

i.  telescopic jacks with flanges of 100 × 200 mm are used;

ii.  stringers of 100 × 100 mm are used; and

iii.  the posts are placed directly beneath the joints of the stringers.

(4)  Posts shall be firmly fixed, supported, and secured at each extremity.

(5)  Formworks for reinforced concrete beams shall be supported by at least 2 rows of posts.

R.R.Q., 1981, c. S-2.1, r. 6, s. 6.6.2; O.C. 1413-98, s. 27.