A davit system is a rooftop access and fall-protection system designed to help workers safely reach, maintain, inspect, repair, or clean the exterior of a commercial building. Davits are commonly used with suspended platforms, rope descent systems, or other access equipment that allows workers to perform tasks along building façades and difficult-to-reach areas.
For commercial property owners, understanding when a davit system is needed is important because safe rooftop access is not simply a matter of installing an anchor. The building’s height, design, façade, maintenance requirements, roof structure, and access equipment all influence the appropriate system.
How Does a Davit System Work?
A typical davit system consists of a davit arm, base or socket, anchorage, and compatible suspended-access equipment. The davit arm extends beyond the roof edge so that ropes or other access equipment can be positioned over the side of the building.
Depending on the design, davits can support equipment used for façade cleaning, window maintenance, inspections, repairs, and other building-maintenance activities. The system must be properly designed and connected to structurally adequate portions of the building.
For suspended scaffolds, OSHA requires support devices to rest on surfaces capable of supporting the required loads, while direct connections must be evaluated by a competent person before use. OSHA also requires suspension systems to be secured against movement where necessary.
When Is a Davit System Needed?
A davit system is generally considered when workers need repeated or controlled access to the exterior of a tall commercial building and conventional methods such as ladders or ground-based equipment are impractical.
Common applications include:
- High-rise and multi-story commercial buildings
- Window and façade cleaning
- Exterior building inspections
- Façade repair and maintenance
- Waterproofing and sealant work
- Exterior lighting or architectural feature maintenance
- Access to areas that cannot be reached safely from the roof or ground
A davit system can be particularly useful when a building has a large vertical façade where workers need to move up and down the exterior repeatedly.
Is a Davit System the Same as a Roof Anchor?
No. A roof anchor and a davit system serve different purposes.
A roof anchor may be designed for fall arrest, restraint, or other specific safety applications. A davit system, on the other hand, is generally part of a larger suspended-access arrangement that positions and supports equipment outside the building.
This distinction matters because an anchor designed for personal fall protection should not automatically be assumed to be suitable for supporting a suspended work platform or davit. OSHA specifically requires structural anchorage and appropriate support for suspended scaffold systems.
What Should Be Considered Before Installation?
Before installing a davit system, the building should be evaluated by qualified professionals. Important considerations include the roof structure, structural attachment points, parapets, roof layout, intended loads, access requirements, equipment compatibility, and applicable safety requirements.
The anchorage must connect to a structurally sound part of the building. OSHA notes that acceptable structural anchorages can include structural members, while items such as vents, electrical conduit, standpipes, and other piping systems are not considered sound anchorages for scaffold tiebacks.
Why Proper Roof Design Matters
Installing rooftop access equipment without considering the roof assembly can create unnecessary risks. Penetrations, flashing, waterproofing, drainage, and structural loads must all be considered during installation.
For commercial buildings in Florida, this is especially important because roofs can experience intense sun, heavy rainfall, strong winds, and severe weather conditions. A properly planned system should work with the building’s roofing and structural requirements rather than compromise them.
When Should You Contact a Roofing Professional?
If your commercial building requires recurring exterior maintenance or difficult-to-reach façade access, it may be worth evaluating whether a davit system is appropriate. A qualified roofing and building-access professional can assess the roof, identify potential installation locations, and coordinate with structural professionals where necessary.
Shieldline Roofing can help commercial property owners evaluate roofing conditions and coordinate the considerations involved in rooftop access, maintenance, and restoration projects. The right solution depends on the building and intended use, so davit systems should be professionally designed, installed, inspected, and maintained rather than treated as a one-size-fits-all roof accessory.
Related Questions
- How are window washing tie-backs certified and recertified?
- What documentation should be kept for rooftop anchor certification?
- How do you provide safe access to elevated equipment platforms?
- What is a horizontal lifeline system and how is it attached to the roof?
- How often must roof anchors be inspected and load tested?
- What is a rooftop access policy and why should every building have one?
- What signage is required at rooftop access points?
New Construction Commercial Roofing
