Quad Frame Fall Protection Systems

Portable Quad Frame Fall Protection Systems

The Tuff Built by Diversified Mobile Quad Frame Fall Protection System provides a convenient, portable means of securing an OSHA compliant fall arrest rigid rail in areas with limited space or outdoor areas lacking overhead anchor points for tie-off. Quad or Box Frame Fall Arrest Systems are rigid rail systems built to accommodate a specific area or piece of equipment and can be designed as permanent or portable frames, for ease of relocation.

The table below shows standard stock sizes/configurations, but if your application requires modifications to an existing design, contact us to discuss your specific needs.

We are a complete turnkey provider of OSHA compliant portable and mobile fall arrest systems and have years of design and installation experience.  Contact us for expert assistance with your fall arrest, fall restraint and fall protection safety requirements.


Stock Design Configurations

ModelWidthLengthHeight to Anchor PointOverall HeightInside LengthOverall Width
Quad Frame, 12W-16L-18H-2R-2A-P12'-0"16'-0"18'-4"20'-0"14'-5"13'-0"
Quad Frame, 12W-16L-18H-1R-2A-U12'-0"16'-0"18'-4"20'-0"14'-5"13'-0"
Quad Frame, 12W-15L-16H-1R-2A-U12'-0"15'-0"15'-10"17'-6"13'-5"13'-0"
Quad Frame, 14W-34L-22H-2R-4A-P14'-4"34'-4"21'-8"23'-4"31'-5"15'-4"

OSHA Regulations

  • Personal Fall Arrest Systems
    • 1926.502(d)(16) Personal fall arrest systems, when stopping a fall, shall:
    • 1926.502(d)(16)(ii) limit maximum arresting force on an employee to 1,800 pounds (8 kN) when used with a body harness;
    • 1926.502(d)(16)(iii) be rigged such that an employee can neither free fall more than 6 feet (1.8 m), nor contact any lower level;
    • 1926.502(d)(16)(iv) bring an employee to a complete stop and limit maximum deceleration distance an employee travels to 3.5 feet (1.07 m); and,
    • 1926.502(d)(16)(v) have sufficient strength to withstand twice the potential impact energy of an employee free falling a distance of 6 feet (1.8 m), or the free fall distance permitted by the system, whichever is less.

Did You Know?

According to OSHA, the distance from a leading edge does not mitigate the hazard? Any leading edge over 4 feet in general industry and 6 feet in construction is considered a hazard.