Roof Anchors: The 5,000 Pound Rule and the 10 Year Recertification

Roof anchors are simple hardware attached to a requirement that is not simple. The load number is the part everyone knows. The certification and the reinspection interval are the parts that decide whether the anchor on your roof is usable today.

M Squared Safety supplies roof anchors and anchorage connectors and ships nationwide. Call 949-954-6581.

The anchorage number, and the two ways to meet it

Both the general industry and the construction rules land on the same figure and the same alternative.

• General industry, 29 CFR 1910.140(c)(13). An anchorage must be capable of supporting at least 5,000 pounds for each employee attached, or be designed, installed and used under the supervision of a qualified person as part of a complete personal fall protection system that maintains a safety factor of at least two.
• Construction, 29 CFR 1926.502(d)(15). An anchorage used for attachment of personal fall arrest equipment must be capable of supporting at least 5,000 pounds per employee attached, or be designed, installed and used as part of a complete personal fall arrest system that maintains a safety factor of at least two, under the supervision of a qualified person.

Two things follow that people miss. The 5,000 pounds is per employee attached, so a two-worker anchor is not the same specification as a one-worker anchor. And the safety-factor-of-two alternative is not a shortcut. It requires a qualified person, an engineered system and supervision, which is more work than buying an anchor rated to 5,000 pounds.

The trigger height differs even though the anchorage number does not: 4 feet in general industry under 29 CFR 1910.28(b)(1)(i), 6 feet in construction under 29 CFR 1926.501(b)(1).

The requirement building owners keep missing

If anyone uses a rope descent system on your building, 29 CFR 1910.27(b)(1) puts a duty on the building owner, not just on the contractor. The owner must inform the employer in writing that the building's anchorages have been identified, tested, certified and maintained as capable of supporting at least 5,000 pounds in any direction for each employee attached.

That information has to be based on an annual inspection by a qualified person, and each anchorage must be certified at least every 10 years.

This catches property managers and facility owners regularly, because the anchors were often installed by a previous owner, or by the original contractor, with no paperwork that survived the sale. An uncertified anchor on a roof is not an anchor you can hand to a window cleaning or maintenance contractor. The same section also limits rope descent systems to heights of 300 feet above grade, unless the employer demonstrates that other means are infeasible or would pose a greater hazard.

Permanent against reusable

A permanent roof anchor is installed into the structure and stays. It is the right answer where the same roof is worked repeatedly, and it is the type the certification regime above is written around. A reusable or portable anchor is installed for the work and removed, which suits a single project, a re-roof or a contractor moving between buildings. Where the roof will take neither, because it is membrane, leased, or has no structure to reach, a counterweighted mobile system or a freestanding guardrail is usually the answer instead.

What fits

Roof anchors covers the permanent and reusable roof range. Anchorage connectors covers beam anchors, cross arm straps, concrete anchors and the wider range for structure other than roof deck. Pair them with harnesses, self-retracting lifelines and lanyards, and check the fall clearance before you specify the connector.

Where the roof cannot take an anchor at all, see mobile fall protection and guardrail systems. Guardrail is passive and sits higher in the hierarchy of controls than any anchor and harness combination, which is worth considering before you specify anchors at all.

Common applications

• Rooftop equipment service, where the technician needs a tie-off near the unit.
• Window cleaning and facade access using rope descent systems, where the 10 year certification applies.
• Re-roofing and roof coating, where a reusable anchor moves with the work.
• Skylight and hatch work, where the hole rather than the edge is the hazard.
• Steep-slope residential roofing, where the anchor is the practical alternative to a guardrail.

Specifying and buying

We ship anchors and anchorage connectors across the United States and Canada. Permanent installation into a structure is engineering work and should be specified and installed by a qualified person, which is also what the certification regime assumes.

If you are working out whether your roof needs a permanent anchor, a reusable one, a mobile system or a guardrail, that is a fall protection plan question rather than a purchasing question. Call 949-954-6581. See also fall protection in residential construction and fall protection training.

Common questions

How much weight does a roof anchor have to hold?

At least 5,000 pounds for each employee attached. That figure is set in 29 CFR 1910.140(c)(13) for general industry and 29 CFR 1926.502(d)(15) for construction. The alternative in both is an anchorage designed, installed and used under the supervision of a qualified person as part of a complete personal fall protection system maintaining a safety factor of at least two. Note that the load is per employee attached, so a two-person anchor is a different specification from a one-person anchor.

Do roof anchors have to be certified?

For rope descent systems, yes. 29 CFR 1910.27(b)(1) requires the building owner to inform the employer in writing that each anchorage has been identified, tested, certified and maintained as capable of supporting at least 5,000 pounds in any direction for each employee attached. That information must be based on an annual inspection by a qualified person and on certification of each anchorage by a qualified person.

How often do roof anchors have to be recertified?

At least every 10 years for anchorages used with rope descent systems, under 29 CFR 1910.27(b)(1), with an annual inspection by a qualified person in between. This is the requirement that most often catches building owners out, because anchors are frequently inherited from a previous owner or the original contractor with no surviving paperwork. Without the certification you cannot hand the roof to a facade access or maintenance contractor.

What does a building owner have to give a contractor before rope descent work?

Written information, before work begins, confirming that the anchorages have been identified, tested, certified and maintained to support at least 5,000 pounds in any direction per employee attached, under 29 CFR 1910.27(b)(1). The duty sits on the building owner rather than on the contractor. A verbal assurance that the anchors are fine does not meet it.

Is the anchorage requirement different in construction and general industry?

The anchorage load is the same, 5,000 pounds per employee attached, under 29 CFR 1910.140(c)(13) and 29 CFR 1926.502(d)(15). What differs is the height at which fall protection is triggered: 4 feet in general industry under 29 CFR 1910.28(b)(1)(i) and 6 feet in construction under 29 CFR 1926.501(b)(1). The same technician on the same roof can be under either trigger depending on whether the job is service work or construction work.