SPX Cooling Technologies SS-NC-08A Specifications, Specification Value, Guardrail and Ladder

Marley / NC Class Stainless CoolingTower / Specifications: Options 11

Specifications

Convenience and Safety Options

Guardrail and Ladder:

11.2Add the following paragraph in the Access section: The top of the tower shall be equipped with a sturdy guardrail, complete with kneerail and toeboard, designed according to OSHA guidelines and factory welded into subassemblies for ease of field instal- lation. Posts, toprails and kneerails shall be 38mm square tubing. The guardrail assembly shall be hot dipped galvanized after welding and capable of withstanding a 890N concentrated live load in any direction. Posts shall be spaced on centers of 2.4m or less. A 46cm wide aluminum ladder with 76mm I-beam side rails and 32mm diameter rungs shall be permanently attached to the endwall casing of the tower, rising from the base of the tower to the top of the guardrail.

Ladder Extension:

11.2Add the following to the end of the above paragraph: Provide a ladder extension for connection to the foot of the ladder attached to the tower casing. This extension shall be long enough to rise from the roof (grade) level to the base of the tower. The installing contractor shall be respon- sible for cutting the ladder to length; attaching it to the foot of the tower lad- der; and anchoring it at its base.

Ladder Safety Cage:

11.3Add the following paragraph in the Access section: A heavy gauge galva- nized steel safety cage shall surround the ladder, extending from a point approximately 2m above the foot of the ladder to the top of the guardrail.

Ladder Safety Gate:

10.3Add the following paragraph in the Access section: A galvanized steel, self-closing gate shall be provided at the guardrail level of the ladder.

Specification Value

■The NC Class cooling tower has been designed to minimize the need for mainte-

nance personnel to get on top of the tower to perform maintenance and inspections.

For the comfort and safety of your operat- ing personnel, we recommend that you specify a ladder and guardrail—and that you require it of all bidders! Although not required for safe operation by OSHA many user's own safety rules may dictate these options.

Outside the tower, stainless steel guardrail

material is not normally considered necessary. If you air quality is sufficiently poor to warrant stainless steel, change the specifica- tion wording accordingly.

■Many towers are installed such that the base of the tower is 61cm or more above the roof or grade level. This makes it difficult to get up to the foot of the attached ladder. The ladder extension alleviates this problem. Marley ladder extensions are available in standard 1.5m and 3.3m lengths.

■To meet OSHA guidelines, towers whose fan decks are 6m or more above roof or grade, and which are equipped with lad- ders, should have safety cages surrounding the ladders, but with approximately 2m clear headroom.

Outside the tower, stainless steel safety cage material is not normally considered necessary. If you air quality is sufficiently poor to warrant stainless steel, change the specification wording accordingly.

■A galvanized self-closing gate located at the guardrail level of the fan deck, exterior motor access platform and access door platform. Stainless steel is available with the stainless guardrail option.