MODULE THREE – ROOF DECK AWARENESS. The employer shall determine if the walking/working surface on which its employees are to work have the strength.

MODULE THREE – ROOF DECK AWARENESS

The employer shall determine if the walking/working surface on which its employees are to work have the strength and structural integrity to support employees safely. Employees shall be allowed to work on those surfaces only when the surface have the requisite strength and structural integrity.

Question (1)(a): Scenario: A commercial roofing contractor is engaged in a re-roofing job. In the course of removing the weatherproofing material, the contractor discovers that some of the metal roof decking has deteriorated, and that a 6' X 6' section has to be replaced. Is this replacement work covered under Part 1926 Subpart R?

AnswerUnder §1926.750(a), Subpart R is not limited to new construction - it also applies to steel erection activities in alteration and repair work. Section 1926.750(b)(1) contains a list of activities that are covered by Subpart R, including "installing metal decking." Since §1926.750(a) states that steel erection activities done during repair are covered by Subpart R, the reverse of the decking installation process - removal - is also covered under §1926.750(b)(1).

Corrugated Metal

Wood

Gypsum

Tectum

Corrugated MetalRustElectrolysis

WoodDry RotSaturationCrushed / Split

GypsumMoistureSpallingCracked / SplitDry

TectumMoisture

Interior EvaluationsCovered SkylightsWater stainsRustSaggingCracked/Peeling PaintHumidityOwner’s

RepresentativeAge of BuildingStructural DesignConstant Leaks

Interior EvaluationsWater stainsRustSaggingCracked/Peeling PaintHumidityOwner’s

RepresentativeAge of BuildingStructural DesignConstant Leaks

Exterior EvaluationsPondingRepairs / PatchesSaggingSpongy InsulationInfrared Scans

Exterior EvaluationsPondingRepairs / PatchesSaggingSpongy InsulationInferred Scans

Employees identified wet gypsum decking material

100% tie off utilized while working at edge and around roof opening

100% tie off utilized while working at edge and around roof opening

Sistering SheetsDepends on flutesPrimarily B-decking

Galvanized Metal Plates2’ x 2’3’ x 3’Etc.

Corrugated Metal / Wood Roof Anchors Fall Protection Carts Horizontal Lifelines

Gypsum / Tectum Fall Protection Carts Toggle bolt 2”x 10” –

attach roof anchor Fasten roof anchor to

steel support beams Feed choker cable

through deck and around steel support beams

Uses:

Removing or installing coping Tear-off and installation of leading edge Removal and replacement of in-field roof deck Installing or dismantling edge guardrail systems Working around roof openings Removing or installing covers or skylights Snow removal

Hazard Identification Flag off suspicious

section of decking Transfer marks /

measurements from interior inspection

Sequence scope of work

Maintaining a solid working surface

Have replacement sheets pre-cut / ready to be in installed immediately

Plywood laid out to provide solid working surface.

Ponding water or spongy insulation is a sign moisture may be trapped in the insulation? True____ False_____

The roofing system itself may have enough strength to support a worker walking across the roof? True____ False_____

Decking may look solid from the bottom, but can be deteriorated under the roofing system? True____ False_____

Water intrusion does not affect gypsum or tectum decking? True____ False_____

Netting the inside of the building is one method of providing fall protection when replacing a deck?

True____ False_____

Name:_________________

Date:__________________