9:12 Roof, Tied-Off Nowhere, 109 Heat Index
A crew of four is reroofing a two-story house in Shreveport on a 9:12 pitch. The eave is 19 feet above grade at the back and 24 feet at the front. The extension ladder reaches about 2 feet above the eave and sits on soft sod at roughly 55 degrees. Nobody on the roof is tied off; the foreman says the pitch 'isn't that bad' and that a warning line has been ordered but has not arrived. It is 2:15 p.m. on August 8: 97 degrees, heat index 109, relative humidity 68 percent. The water cooler is in the truck and there is no shade. Two of the crew started three days ago. One worker, age 19, complains of headache, nausea, and leg cramps; the foreman hands him a sports drink and tells him to finish the ridge.
1. List the fall protection and access violations with the applicable OSHA requirement, and state what must be true before anyone goes back on that roof.
Read the worked answer
This roof is a textbook steep-roof job; the foreman's comfort level is irrelevant to the standard.
Fall protection. At 9:12 the roof is steeper than 4:12, which triggers 29 CFR 1926.501(b)(11): guardrail systems with toe boards, or safety net systems, or personal fall arrest systems, or a combination - with no alternative-measures loophole. A warning line is a designated-area control for low-slope work and is not an acceptable substitute here (and the residential provision at 1926.501(b)(13) still requires conventional protection at 6 feet). The fall distance (19-24 ft to grade) makes any arresting system a high-consequence one: anchorages must support 5,000 lb per employee or be designed by a qualified person, free fall must be limited, and arrest forces must stay within 1,800 lb (1926.502(d)). Employees need training before use (1926.503).
Access. Ladders must extend at least 3 feet above the landing, be set at roughly a 4:1 angle, and be secured against displacement on a stable base (1926.1053(b)). At 2 feet of extension, at 55 degrees, on soft sod, with no tie-off, the ladder fails all three - and it is the only way up and the only way to carry a victim down.
Before anyone goes back up: a written fall protection plan naming the system and anchor points, installed and inspected anchors, harnesses fitted and trained, the ladder tied off and extended properly, and a competent person's sign-off. No exceptions for 'we're almost done.'
2. Evaluate the foreman's heat illness response against recognized practice, and state what happens now.
Read the worked answer
The response is wrong at the point that matters most: symptoms were recognized and the worker was sent back to work.
Headache, nausea, and cramps together are heat exhaustion, not a hydration inconvenience. Recognized practice - NIOSH criteria and OSHA's heat enforcement posture under the General Duty Clause, 29 U.S.C. 5(a)(1) - is:
- Move the worker to shade or air conditioning immediately, loosen clothing, cool actively, and give fluids if he is alert.
- Do not return him to work that shift. Monitor for worsening: confusion, slurred speech, loss of consciousness, or hot dry skin mean heat stroke - call 911 and cool aggressively while waiting.
- Water at the point of work, not in the truck; scheduled rest in shade; buddy system; a written emergency plan with the site address posted for dispatch.
The aggravating factors here are specific and all preventable: two workers three days into the job are not heat-acclimatized (new and returning workers carry the highest risk in the first week or two and should be brought on gradually), the work was scheduled through the hottest hours, and there was no shade or water at the roof.
Now: pull the worker off the roof, cool him, and have him evaluated - cramps plus nausea after hours of heat load can deteriorate quickly. Stop work for the day, notify the owner and your insurer if any medical treatment is needed, and document the incident while memories are fresh.
3. Describe the written job plan you would implement for tomorrow's shift, addressing fall, access, and heat in one coordinated sequence.
Read the worked answer
One plan, one page, signed by the crew, with the three hazards integrated rather than handled as separate toolbox talks.
Schedule. Start at 6:00 a.m. and stage the heaviest work before 11:00 a.m.; finish ridge and detail work in a cooler window if the job runs long. Heat is a scheduling problem before it is a drinking problem.
Fall protection. Engineered ridge anchors rated for the number of workers tied off, full-body harnesses with rope grabs and shock-absorbing lanyards, 100 percent tie-off with a transition plan at the ridge and at the ladder. Roof jacks are work platforms, not fall protection. Daily pre-use inspection logged by the competent person.
Access. Ladder tied off at the eave, 3 feet above the landing, 4:1 angle, base on a firm footing (plywood pad over the sod), and a second means of egress for rescue. Materials hoisted, not carried up the ladder.
Heat. Water and electrolyte at the roof edge in a shaded cooler, scheduled rest cycles at a minimum mid-afternoon, shade canopy at grade, acclimatization schedule for the two new hires (shortened exposure, added gradually over the first week or two), buddy system, and posted emergency information with the site address and a charged phone.
Authority. Name the competent person, give every crew member stop-work authority for heat or fall hazards, and brief the whole plan before anyone climbs. If a crew member objects to the fall protection setup, the plan says the work stops - that is the part that keeps the plan from becoming paperwork.