The call comes the way it always does. A property manager wants the glass done twice a year, the building is twelve stories, and there is a davit and a tie-back on the roof that the last contractor used happily for a decade. You price it on rope descent, because rope descent is what the site looks like it wants.
Then somebody asks for the anchorage certification letter and the conversation stops.
The rule people quote, and the rule that actually applies
The relevant text is 29 CFR 1910.27(b)(1), and it puts the first obligation on the building owner, not on you: before a rope descent system is used, the owner must inform the employer in writing that it has identified, tested, certified and maintained each anchorage so that it is capable of supporting at least 5,000 pounds (2,268 kg) in any direction for each employee attached. That certification must be based on an annual inspection by a qualified person and a certification of each anchorage at least every 10 years.
Your side is 1910.27(b)(1)(ii), and it is stricter than most crews expect: no employee uses any anchorage before the employer has obtained that written information, and the employer keeps it for the duration of the job. Not the duration of the relationship — the duration of the job. The paragraph has been in force since November 20, 2017.
Three things follow, and only the first one is comfortable:
- The letter exists. Copy it, file it with the job, and note the date of the underlying inspection. If that annual inspection is nine months old, you have three months of headroom on a twice-a-year contract.
- The letter does not exist. Then that anchorage is not available to you, whatever the last crew did. Your access method has to change — a building maintenance unit under 1910.66, an aerial lift under 1910.67, or ground-fed water and poles — and the bid has to carry that cost.
- Somebody offers a verbal assurance. We've been doing it this way for fifteen years is not written information from the owner. It is also the sentence that shows up in the incident report.
That is the commercial argument for asking early: the access method decides whether the glass is a two-week job or a six-week job, and it has to be settled before the price goes out.
The rest of the rope-descent numbers
Once you are on rope, 1910.27(b)(2) fills in the operating limits, and every one of them has a bid consequence:
- 300 feet (91 m) is the ceiling above grade unless you can demonstrate that no other access is feasible or that the alternative poses a greater hazard. Glass above that height is engineering work, not a per-pane job.
- 130 feet (39.6 m) is where stabilization at the specific work location becomes mandatory. Longer drops mean more rigging time on the schedule.
- 5,000 pounds (22.2 kN) minimum rated load for every component except seat boards, which must support a live load of 300 pounds (136 kg).
- Every workshift the system is inspected before use, and damaged or defective equipment comes out of service immediately. That is a paid task on the schedule, not a habit.
- A separate, independent personal fall arrest system for each employee, tool lanyards on squeegees and buckets, and padding wherever rope can contact an edge, anchorage or obstruction.
The arrest layer has its own thresholds. Under 1910.28(b)(12)(ii), anyone using a rope descent system four feet (1.2 m) or more above a lower level must be protected by a personal fall arrest system. Under 1910.140(c)(4), lanyards and vertical lifelines need a minimum breaking strength of 5,000 pounds; under 1910.140(d)(1), the system must limit maximum arresting force to 1,800 pounds (8 kN) and bring the fall to a stop within 3.5 feet (1.1 m) of deceleration distance. Those numbers are why a hardware-store harness is not a cheaper option — it is a different product.
Who pays, and who signs
Harnesses, lanyards and self-retracting devices are PPE, and 1910.132(h)(1) requires the employer to provide PPE at no cost to the employee. You pay for replacements too, under (h)(5), unless the worker lost or intentionally damaged the item. You may allow an employee to use his own adequate equipment under (h)(6), but you cannot require him to supply it. On a crew of six running two rope systems, that is a recurring line in the budget that most bids bury inside "supplies."
Training is the other document. 1910.30(a)(2) requires training by a qualified person, covering the hazards, the procedures, inspection of the systems the worker actually uses, and proper hook-up and tie-off. Notice what general industry does not demand: a written certification record. Construction does — 1926.503(b)(1) requires a written record with the employee's identity, the training dates and the trainer's signature — but 1910.30 carries no such paragraph. Keep the record anyway. The property manager's insurer will ask for one, and we trained him is not a document.
The arithmetic that makes the letter cheap
Penalties proposed after January 15, 2025 cap at $16,550 for a serious violation and $16,550 per day for failing to correct one, with willful violations running from $11,823 to $165,514, per 1903.15(d). One serious citation off one roof can erase the margin on a small glass contract, and the violation most likely to be written up is the one with a missing document behind it.
So build the file before the bid:
- The owner's written anchorage certification, with the inspection date attached.
- The annual inspection of the building's maintenance unit, including the governors and secondary brake test, if there is a cradle on that roof — 1910.66(f)(2) and (f)(4)(i) both run on a 12-month clock.
- Your rope, harness and hardware inspection log, per shift.
- Training records naming the trainer.
- The written rescue plan that 1910.27(b)(2)(viii) requires you to provide.
Five documents. If the building cannot produce the first one, you have not lost the job — you have found out, at the bid stage, that the job you were about to price is a different job.
