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

Full text
3.24.17. Hoist hooks: Every hook used to hoist a load must present one of the following characteristics:
(1)  be equipped with a safety latch;
(2)  close under the application of the load and be equipped with a self-locking latch requiring a positive action to unlock the hoist hook.
Where a load is hoisted using a hook referred to in subparagraph 1 of the first paragraph, the load must be hung using a shackle or a wrought alloy steel ring.
Where a load remote unhooking device is used, it must have the following features:
(1)  the minimum and maximum loading capacities are conspicuously indicated on the device;
(2)  where the device is engaged, it locks under the application of the load; and
(3)  it opens only when it no longer withstands the weight of the load and a command to open it is issued.
O.C. 391-2011, s. 2.