DUO-SAFETY LADDER CORPORATION DUO-SAFETY LADDER CORPORATION
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Replacement Parts

Aluminum Rungs

Slice view of Rung

All rungs are 1-1/4" diameter by .065" wall thickness. (Standard Rung), unless your section width is wider than 24". In this case, you probably have heavy rungs - 1-1/4" diameter by .105 wall thickness.

Rung Replacement: It is the recommendation from the factory that all rungs be replaced when any rung shows signs of worn/smooth serration's or if any rung is dented, worn through or damaged in any manner. For a statement from the factory, click here.

Sideview of Rung

All replacement rungs are supplied 24" - standard .065 wall.

To remove any welded rung from the rail or plate, you must use a rung reamer tool.

There is no need to replace the rung plates unless they are damaged.

Rung Reamer Tool

The reamer tool pilots itself in the rung hole, and cuts only the old rung away, thereby leaving-the proper size hole for the new rung to be welded in place. If our standard reamer tool will not fit inside your rung - be sure the ladder is a Duo-Safety Ladder and check the width of the section. If the section width is over 24" wide - you have heavy rungs in that section. Heavy rungs are supplied to meet the N.F.P.A. load rating in all sections wider than 24" wide. In these cases you must order our Heavy Rung Reamer Tool and heavy rungs for replacements.

The reamer tool is powered by a 1/2" drill. (Fire Dept. Supplies)

  1. Insert in damaged rung.
  2. Start drill and use very slight pressure to start the cut.
  3. Cut through the weld and inner plate crimp to remove the old rung.
  4. Repeat the process on other rail/plate. (Remove all debris)
  5. Slide new rung through both rails and mark for length and cut same with hack saw.
  6. Hold rung flush and reweld the joint. (We suggest Heli-arch/ wire feed)
  7. If you have replaced more than 3 rungs per section, we suggest you order and use our hand rung expander tool to expand the rung to the inner plates. (Not used on heavy rungs or less than 3 rungs per section.)

Duo-Safety Ladder Corp. ladders all depend 95% on the welded rung joints to hold all ladders together. The minimum yield of our welded joint is 8,000 P.S.I.

The expansion process on the inner plates is a 5% back up system to help protect the weld joint from flexing and cracking.

Thus- if you only replace a few rungs per section - you do not need the expander tool. But if you replace more than 3 rungs per section, we suggest you use the expander tool.

RUNG EXPANDER KIT:

Expander

For field use to replace rungs in any Duo-Safety aluminum ladders, please order and use our rung expander kit if you are replacing more than three rungs in any one section. The rung expander kit consists of: 1. Hand rung expander tool. 2. Rung reamer tool. 3. Instruction sheet.

You remove the damaged rung with the rung reamer tool and your 1/2" drill motor. This tool cuts the old rung away from the ladder rail and inner plate assembly and leaves the proper size finished hole to be able to re-weld the new rung into the rail. (We suggest Heli-arch welding). You then finish the job with the hand rung expander to expand the rung tight on the inner plate assembly (see instructions with kit).

There are two plans available for use of the Rung Expander Kit (rung expander tool & rung reamer tool) or Rung Reamer Tool only. (1) Loan Plan - the rung expander kit or rung reamer tool only is shipped on memorandum billing - a credit is issued upon its return. The only charge is for shipping. (2) Purchase Plan - the rung expander kit or rung reamer tool only may be purchased outright. See our Price List for current pricing. Extra rungs and plates are billed F.O.B. Oshkosh, Wisconsin.

If you still have questions, please call 920-231-2740. See our Price List for current pricing.

Duo-Safety Catalog REQUEST A
CATALOG
Pround Members Of:

Fire Apparatus Manufacturers Association National Fire Protection Association International Fire Service Training Association NY State Association of Fire Chiefs Wisconsin Safety Council

We suggest all Fire Departments refer to both the National Fire Protection Association (N.F.P.A.) and the International Fire Service Training Association (I.F.S.T.A.) for complete and proper practices and usage of Fire Service ladders.

National Fire Protection
Association (N.F.P.A.)

1 Batterymarch Park
Quincy, MA 02169
Phone: 1-800-344-3555
Fax: 1-617-770-0700
www.nfpa.org
International Fire Service
Training Association (I.F.S.T.A.)

930 North Willis
Stillwater, OK 74078
Phone: 1-800-654-4055
Fax: 1-405-744-8204
www.ifsta.org