A6308 Stainless Steel Permanent Roof Anchor
The Malta Dynamics A6308 is a permanent, dual-end roof anchor built for the ridge of a wood-framed roof. Its stainless steel body and two alloy steel D-Ring ends give a worker a tie-off point on either side of the ridge, and a low-profile shape that sits discreetly under the ridge cap once installed. Fasteners are included, so a crew can nail it down and get to work.
The A6308 has a 5,000 lb minimum breaking strength and a 130 to 310 lb worker capacity, and supports one worker in fall arrest. It meets OSHA 1910.66, OSHA 1926 Subpart M, ANSI A10.32-12, and ANSI Z359.18-2017 Type A, and ships with a Malta Dynamics Declaration of Conformity backed by independent Intertek ISO 17025 laboratory testing.
Who Needs This Product
The A6308 is a permanent anchorage connector - the tie-off point of a personal fall arrest or restraint system for crews working on wood-framed roofs. It mounts to the roof ridge over the sheathing and into a truss, and stays in place for ongoing access during construction, reroofing, and later maintenance. Each connected worker still needs an ANSI full body harness and a compatible connecting device, such as a self-retracting lifeline or a shock-absorbing lanyard that limits maximum arrest force to 900 lb or less.
Features
Dual D-Ring ends
Two alloy steel D-Ring ends sit on either side of the ridge, so a worker can tie off on the slope they are working without moving the anchor.
Stainless steel body
A stainless steel body with stainless fasteners resists weather and corrosion for an exceptionally long service life as a permanent fixture.
Truss-friendly hole layout
An exclusive pre-punched hole pattern spreads the nails along the ridge to reduce the chance of splitting the truss during install.
Low-profile design
The flat body tucks under the ridge cap so only the D-Ring ends are exposed once installation is complete.
Fasteners included
Ships with eight 16d common nails, so the anchor can be installed with the nails provided or with comparable screws into the support structure.
Independently verified
Backed by a Malta Dynamics Declaration of Conformity with third-party testing performed by Intertek under ISO 17025 accreditation.
Technical Specifications
| SKU | A6308 |
|---|---|
| Type | Dual-end permanent roof anchor for wood ridge installation |
| Variant | 10 in ridge (Permanent Roof Anchor family) |
| Users | 1 worker in fall arrest (1 person maximum per anchor) |
| Worker capacity | 130 to 310 lb per user, including tools and equipment |
| Minimum breaking strength | 5,000 lb (22.2 kN) when statically tested to ANSI Z359.1 |
| Body material | Stainless steel |
| D-Ring material | Alloy steel (two D-Ring ends) |
| Fasteners | Eight 16d x 3-1/2 in common nails included (stainless steel set screws also supplied); one fastener per pre-punched hole, all holes filled |
| Substrate | Wood-framed roof ridge only, over sheathing into a truss (not for metal roofs) |
| Mounting location | Roof ridge, minimum 6 ft from any edge |
| Maximum free fall | 6 ft (no vertical free fall permitted in restraint) |
| Connector requirement | Fall protection system that limits maximum arrest force to 900 lb or less; ANSI full body harness with a double-locking carabiner or snap hook |
| Product weight | Approximately 1.1 lb each |
| Compliance | OSHA 1910.66; OSHA 1926 Subpart M and 1926.502; ANSI A10.32-12; ANSI Z359.18-2017 Type A; ANSI Z359.1-2007 |
| Declaration of Conformity | MD3P336, Intertek ISO 17025 third-party tested (test report 105876425CRT-001) |
| Warranty | 1 year limited (Malta Dynamics) against factory defects in workmanship and materials |
Structure and nails carry the load. The A6308 is only as strong as the ridge it is nailed to. Install it only on a wood roof ridge over sheathing and into a truss, fill every pre-punched hole with a 16d common nail, mount it at least 6 ft from any edge, and have a competent person confirm the structure can support a 5,000 lb anchorage load. Do not use it on metal roofs, and calculate fall and swing-fall clearance before tying off.
Compliance Standards
ANSI Z359.18-2017 Type A
Anchorage connectors standard - the A6308 is designed and tested to this standard for a single-worker Type A anchorage.
ANSI A10.32-12
ANSI/ASSP standard for fall protection systems used in construction and demolition operations.
OSHA 29 CFR 1926 Subpart M
Construction fall protection, including anchorage strength requirements under 1926.502(d).
OSHA 29 CFR 1910.66
General industry personal fall arrest anchorage requirements.
Typical Applications
Installation Overview
Install per the Malta Dynamics user instruction manual. The sequence below is an overview only.
- Inspect. Check the anchor body, D-Rings, finish, and labels, and inspect trusses, rafters, and sheathing for decay or defects before install.
- Verify structure. Confirm the wood roof framing can carry a 5,000 lb anchorage load, verified by a competent person.
- Select the site. Choose a ridge location at least 6 ft from any edge that minimizes swing-fall hazards and limits free fall to under 6 ft. On finished roofing, remove one or two pieces of ridge cap.
- Position. Center the anchor on the ridge so the center nail holes line up over the middle of the roof framing member, over the sheathing and above a truss.
- Fasten. Drive a 16d x 3-1/2 in common nail in every pre-punched hole, one nail per hole. Nails must enter the support structure without splitting the timber or protruding through the members.
- Connect. Clip an ANSI full body harness and a connecting device that limits arrest force to 900 lb or less to a D-Ring with a double-locking carabiner or snap hook, then verify fall clearance before work begins.
Inspection and Retirement
Inspect before each use, with a documented competent-person inspection at least annually. Remove the anchor from service for any of the conditions below.
- Body: bending, cracks, dents, deformities, or corrosion - the anchor legs should be flat.
- D-Rings: distortion, nicks, burrs, sharp edges, or D-Rings that do not move freely.
- Nails: loose, missing, backed-out, or corroded - re-secure per the manual before use.
- Welds and rivets: any cracking or loosening at attachment points.
- Labels: must remain legible and attached to the anchor.
Retirement triggers: any equipment subjected to the forces of a fall arrest must be removed from service immediately. The anchor must not be altered or repaired in the field - only Malta Dynamics or an authorized entity may repair it.
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Frequently Asked Questions
Malta Dynamics A6308 Submittals and Documentation
A6308 Spec Sheet (PDF)Key features, capacity, materials, and compliance summary. A6308 User Instruction Manual (PDF)Ridge installation, nailing pattern, connector compatibility, inspection, and warranty. A6308 Declaration of Conformity (PDF)ANSI Z359.18-2017 conformity statement with Intertek ISO 17025 third-party test verification.Compatible and Related Products
- Malta Dynamics A6304 4-Way Anchor Plate. A reusable plate anchor for metal, wood, and concrete decks.
- Malta C7050 50 ft Vertical Lifeline Assembly. Rope lifeline and rope grab to connect a harness to the anchor.
- Malta HLL3001 100 ft Horizontal Lifeline Kit. Four-worker rope HLL the A6308 can anchor per the manual.
- Malta B2002 Warthog Full Body Harness. ANSI full body harness to complete the personal fall arrest system.
