Published Date: July 01, 2009
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Section 88.1 Personnel baskets

Section 88.1(a)

Clause 5.4.7 of CSA Standard CAN/CSA Z150-98 (R2004) states: Personnel Lifting for Suspended Baskets General
The person specifically responsible for the overall work function to be performed shall determine that there is no practical alternative way to perform the needed work or gain access to the area, and shall authorize its usage.  Platform Requirements
The platform that the worker is on shall

(a) be capable of supporting, without failure, its own weight and at least five times the rated load of the platform;

(b) have a minimum carrying capacity of 136 kg (300 lb);

(c) be designed and approved by a professional engineer, and in accordance with good engineering practice;

(d) have design drawings that set out the size and specifications of all components of the platform, including the type and grade of materials used for it, the rated load of the platform, and instruction for the proper maintenance and inspection of the platform;

(e) be equipped with a second means of suspension or support, where the second means of support is secured above the hook. The secondary support shall, at all times, be connected to the travelling block, and neither impede the operation of the hoist line and travelling block nor compromise the structural integrity of  the travelling block or the hoist line;

(f) be constructed and maintained in accordance with the design drawings;

(g) have all weldments conforming to CSA Standard W59 or ANSI/AWS D14.3. Similar standards or procedures are acceptable, providing the welding process meets or exceeds the criteria of CSA Standard W59 or ANSI/AWS D14.3;

(h) not have synthetic slings and slings utilizing wire rope clips used as part of the main suspension system;

(i) be modified or repaired in accordance with the manufacturer’s specifications or as directed by a professional engineer;

(j) be designed, constructed and maintained so that the failure of one means of support or suspension will not cause the collapse of all or part of the platform;

(k) have the primary and secondary suspension designed with a factor of safety of 10 to 1;

(l) have bridles and associated rigging for attachment to the hoist line that are identified and used only for the purpose of lifting or lowering workers;

(m) be equipped with sufficient numbers of fixed supports for lanyards. Fixed supports for lanyards are clearly identified. Each support shall be free of sharp edges that might cut or chafe the connection and each shall have the ability to resist the arrest forces in case of a fall;

(n) have all eyes in wire-rope slings fabricated with a Flemish eye, with mechanical splice;

(o) have all wire rope, shackles, rings, master links, and other rigging hardware capable of supporting, without failure, at least ten time the maximum intended load applied or transmitted to that component;

(p) have guardrail protection, consisting of a top rail, intermediate rail, toe board, and lower barrier. The top rail shall be no less than 900 mm (39 in) nor more than 1140 mm (45 in) in height with respect to the platform floor. The intermediate rail shall be positioned at an equal distance between the toe board and the top rail. The toe board shall be around the periphery of the platform and shall be a minimum of 90 mm (3.5 in) in height. The lower barrier shall span the distance between the toe board and intermediate rail and be of solid construction or expanded metal.

(q) have continuous hand or grab rail inside the perimeter of the suspended platform;

(r) have flooring with a slip-resistant surface, with provision to allow free drainage of liquids;

(s) have means of securing loose items within the platform; and

(t) if built with an access gate, be equipped with an acting device to restrain the gate from accidental opening. When provided, access gates shall swing into the platform.

Section 88.1(b)

See section 75.1

Commentary about “commercially manufactured”

In general, a commercially manufactured product has the following qualities

(a) it is designed and built to some standard or generally accepted engineering principles that make it safe for use;

(b) it is designed and built by person(s) with the skill or competence to be able to make the product safe;

(c) it is produced with the intention of being generally available to anyone who wants to buy it – normally there is an exchange of money;

(d) it is normally supported by the manufacturer with a warranty, guarantee, and product support; and

(e) liability and safety issues related to its use have been addressed by the manufacturer.

It is implied by the OHS Code, that a product that is “commercially manufactured” is “safe” because it has been produced by a “manufacturer” that has the skills and competencies to do so.

Criterion (a) refers to the product being designed and built to some “generally accepted engineering principles”. It is expected that a “manufacturer” is able to provide drawings or sketches of the product that include an assessment of the product’s strength, load-bearing capacity, etc. Further, criterion (d) mentions “product support”. This may include, among other elements, the availability of written manufacturer specifications.