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? Answer Under § (a), Subpart R is not limited to new construction - it also applies to steel erection activities in alteration and repair work. Section (b)(1) contains a list of activities that are covered by Subpart R, including "installing metal decking." Since § (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 § (b)(1).

Corrugated Metal Wood Gypsum Tectum

Corrugated Metal Rust Electrolysis Wood Dry Rot Saturation Crushed / Split Gypsum Moisture Spalling Cracked / Split Dry Tectum Moisture

Interior Evaluations Covered Skylights Water stains Rust Sagging Cracked/Peeling Paint Humidity Owner’s Representative Age of Building Structural Design Constant Leaks

Interior Evaluations Water stains Rust Sagging Cracked/Peeling Paint Humidity Owner’s Representative Age of Building Structural Design Constant Leaks

Exterior Evaluations Ponding Repairs / Patches Sagging Spongy Insulation Infrared Scans

Exterior Evaluations Ponding Repairs / Patches Sagging Spongy Insulation Inferred Scans

Employees identified wet gypsum decking material

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

Sistering Sheets Depends on flutes Primarily B-decking Galvanized Metal Plates 2’ 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:__________________