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

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4.7.5. When blasting is done in the vicinity of a structure such as a building, railway or road, the employer must limit the quantity of explosives so that the vibrations caused by the blasting do not damage those structures.
To that end, the employer must comply with the most stringent standards between those provided for in specifications designed for that purpose by a public authority and those provided for in blasting specifications signed and sealed by an engineer. Failing such specifications, the employer must comply with one of the standards provided for in Schedule 2.6.
R.R.Q., 1981, c. S-2.1, r. 6, s. 4.7.5; O.C. 1959-86, s. 64; O.C. 57-2015, s. 50.
4.7.5. When blasting is done in the vicinity of a building, railway line, road or electric distribution line, the load must be limited and a blasting mat used. The backfill must not contain single particles or conglomerates larger than 5 mm. The blasting mat must be deposited but not slid into place.
R.R.Q., 1981, c. S-2.1, r. 6, s. 4.7.5; O.C. 1959-86, s. 64.