Derrick 6D Bosun Harness
Engineered for derrick operations and elevated work, the Frontline 150DHTW Derrick 6D Bosun harness combines fall arrest, work positioning, and suspension in one chassis. High-strength materials and six D-ring attachment points support derrick-specific tie-off configurations. An integrated, removable Bosun chair sling seat and a padded work-positioning belt deliver comfort for extended seated work, while grommeted leg straps allow a custom, secure fit.
Polyester with alloy steel hardware. Rated to a 310 lb capacity and 5,000 lb breaking strength. Compliant with ANSI Z359.11-2021 and OSHA 29 CFR 1910 and 1926.
Who Needs This Product
This product is a personal fall protection full body harness. It is used as the wearer-side component of a personal fall arrest system (PFAS), a work positioning system, or a fall restraint system. Pair it with a compatible energy-absorbing lanyard or self-retracting lifeline (SRL) and a certified anchor rated to 5,000 lb. The harness is not a complete fall arrest system on its own.
Features
Removable Bosun chair sling seat
Integrated 2.75 in sling seat with Bosun attachment supports the worker for extended seated derrick tasks; removes when not needed.
Six D-rings for arrest, positioning, and suspension
The 6D layout covers fall arrest at the dorsal, positioning at the hips, and suspension at the sling seat.
Padded work-positioning belt
Padded belt adds comfort and support for long shifts at the derrick or monkey board.
Grommeted leg straps, nine positions
Adjustable grommeted leg straps lock in a custom, secure fit across nine positions.
Lanyard keepers
Built-in keepers stow connecting hardware so lanyards stay out of the way until needed.
Galvanized hardware and high-strength webbing
Alloy steel hardware and high-strength polyester webbing built for demanding derrick environments.
Configurations
| Size | SKU | Price |
|---|---|---|
| S | 150DHTW-S | $603.99 |
| M/L | 150DHTW-ML | $603.99 |
| XL/2XL | 150DHTW-XL/2X | $603.99 |
Technical Specifications
| Series | Derrick |
|---|---|
| SKU | 150DHTW |
| Rated user capacity | 310 lb (worker, clothing, tools, and harness combined) |
| Breaking strength | 5,000 lb |
| Webbing material | Polyester |
| Webbing width | 1.7 in |
| Stitching | High-tenacity polyester |
| Hardware | Alloy steel |
| D-rings | Dorsal (primary fall arrest anchor between the shoulder blades); Sternal (front) (chest d-ring); Hip (lifting) (two hip lifting d-rings for derrick and monkey-board positioning); Bosun seat sling (two suspension d-rings on the integrated sling seat for prolonged suspension) |
| Weight | 10.9 lbs |
| Available sizes | S, M/L, XL/2XL |
| ANSI standard | Z359.11-2021 |
| OSHA alignment | 29 CFR 1910 Subpart I; 29 CFR 1926 Subpart M |
Capacity and free fall. The 310 lb capacity includes the worker plus clothing, tools, and harness combined. Maximum free fall for a personal fall arrest system is 6 ft per OSHA 1926.502 when anchored at the dorsal D-ring. Calculate fall clearance for every setup before tying off.
Compliance Standards
ANSI Z359.11-2021
American National Standards Institute fall protection standard for this product class.
OSHA 29 CFR 1926
Subpart M construction industry fall protection (1926.500-503).
OSHA 29 CFR 1910
Subpart I general industry walking-working surfaces and PPE.
Typical Applications
Donning Overview
Single-operator donning per the Frontline user manual. Always refer to the manual for the full procedure.
- Inspect. Run the harness through a pre-use inspection: webbing, hardware, stitching, labels, fall indicators.
- Orient. Hold the harness up by the dorsal D-ring. Shake the leg straps free so they hang clean.
- Shoulders. Slip both arms through the shoulder straps with the dorsal D-ring centered between the shoulder blades.
- Chest. Connect the chest buckle. Adjust so the strap sits 6 to 8 inches below the collarbone.
- Legs. Pass each leg strap under the thigh and connect at the leg buckle. Tighten until two fingers fit between strap and thigh.
- Tighten. Adjust shoulders, chest, and legs evenly. The dorsal D-ring should rest between the shoulder blades, not riding up the neck or down the lower back.
Inspection and Retirement
Inspect every component before each use. A competent person inspects formally on a documented interval, typically every 6 months under ANSI Z359.2. Pull the equipment out of service for any of the conditions below.
- Webbing: cuts, burns, abrasion, chemical attack, broken threads, loose stitching.
- Hardware: cracks, deformation, sharp edges, corrosion, improper function of buckles and D-rings.
- Stitching: cut, broken, or loose stitches; pulled threads at any load point.
- Labels: legible and intact. Date of first use recorded.
- Fall indicators: any deployed or stretched indicator pulls the equipment out of service immediately.
- Connectors and hooks: gates close fully under spring tension; latches lock; no rollout exposure.
Retirement triggers: any deployed fall indicator, any equipment involved in a fall event, any chemical exposure outside the manufacturer-published list, or any condition where the inspector cannot positively verify the equipment is fit for service.
Fall ProtectionDistributors, LLC Free Tool · No Signup · OSHA 1926.502 Free Interactive Tool Fall Protection Calculator Pick your system. Run the math. Generate a plan. 1Pick Your SystemDetermine fall restraint vs. fall arrest based on your work surface, edge access, and clearance. 2Run the MathCalculate exact fall clearance required below the work surface for your SRL or lanyard setup. 3Generate a PlanGet a printable OSHA-compliant Fall Protection Plan structured around 29 CFR 1926.502(k).
Frequently Asked Questions
Frontline 150DHTW Submittals and Documentation
Frontline 150DHTW Spec Sheet (PDF)Dimensions, weights, materials, hardware, and the full feature and compliance summary. Frontline 150DHTW Independent Lab Test Report (PDF)Independent third-party lab test results verifying the ANSI performance clauses. Frontline 150DHTW User Instruction Manual (PDF)Donning, adjustment, inspection, and retirement procedures.Compatible and Related Products
- Derrick Vest Style Harness (150DHVT). Derrick and monkey-board harness.
- Derrick Harness Belly Belt accessory (150AC-BB). Work-positioning belly belt accessory.
- Patriot Tower Climbing Harness with Seat Sling (350TWQC). Union made in USA.
- Frontline RPAS Aramid Single Leg SRL. Heat-resistant aramid web SRL suited to oil and gas work.
Buying Harnesses for a Crew?
Need help specifying the right system for your jobsite? Confirm your application, anchorage, and clearance with us and we will walk through the kit list so the right equipment ships together.
Call 863-703-4522 to talk to a fall protection specialist.
