Scissorsafe Anchorage points cast into concrete soffits providing installers with overhead anchorage points for fall arrest or work restraint.
Expendable plastic void formers are simply nailed or screwed onto formwork decking which form a tee shaped void in the concrete.
When the concrete has reached strength of 25kN/m3. The void is an accessible anchor point into which A Scissorsafe Anchorage Tool is inserted allowing connection for a personal safety system.
Scissorsafe Anchorage Points
are cast into the structure
Inexpensive Two Part Plastic Void Formers are nailed to the decking formwork from Scissorsafe designed setting-out plans, these ensure that drilled anchors will not be needed.
SCISSORSAFE INSTALLATION STEPS
Nail the Disc onto the formwork
Place a mould over the disc and
press until it clicks into place
Pour the concrete
Formwork removal exposes
the Void Former plastic disk
Insert the Scissorsafe Anchorage
Tool into the cast-in mould
Lock the Anchorage Tool using a 10mm Karabiner – 22Kn Rated
SCISSORSAFE ANCHORAGE FOR
WORK RESTRAINT / FALL RESTRAINT
A Temporary Work Restraint System will provide a high level of safety for workers when operating in areas with unprotected fall hazards and leading edges.
Temporary Work Restraint Systems consist of components that restrict the workers movement within a safe working zone, preventing them from reaching the fall hazard.
When installed the Work Restraint system provides a high level of safety and where four user’s can operate in a safe working zone.
Single Point Anchorage
for work restraint
Single Point Anchorage’s can be effective when an operative has work task’s in small isolated area’s , particularly effective in window openings or on balconies.
Dual Point Anchorage for
Horizontal Lifelines / Running Lines
Scissorsafe anchorage’s are linked to Temporary Horizontal Lifelines (also referred to as Running Lines ). The maximum length of the temporary lifeline is 20 metres, typically they will be positioned 3 metres from the leading edge running parallel to it which provides a safe working zone of 60 square metres.
Four workers have complete freedom of movement along the lifeline without needing to transfer from one anchor point to another. This allows them to pass equipment , materials and tools to each other or to any point in the safe working zone.
TEMPORARY FALL ARREST
Fall arrest is the form of fall protection which involves the safe stopping of a person who is already falling, in other words, the system stops a worker’s fall that has already occurred, preventing impact at a lower level and protecting the fall victim by decelerating the rate of fall.
Fall Arrest may be considered appropriate where a worker needs freedom of movement to access a difficult to reach part of a structure eg an area where in Work Restraint the worker cannot align parallel to a running line, however Fall Arrest equipment also allows them to reach the point where a fall could occur.
A Fall Arrest system comprises an Anchorage connected to the user’s safety harness with a self-retracting lifeline, these function in a similar way to a car seat belt. A re-coiling main spring keeps a galvanised steel cable in light tension, allowing it to respond immediately in the event of a fall.
Overhead anchorage points reduce the angle of the users Fall Arrest Connecting Device, meaning that if he falls, the effects of a swing-fall or pendulum swing are greatly reduced.
When Scissorsafe is to be utilised as a Fall Arrest System, anchorage points should be pre-planned at regular intervals around the structures perimeters and leading edges so that the user can access an anchorage point above the work area.
The recommended limitations when working connected to an overhead anchorage is 30 degrees in a horizontal direction and fall arrest devices such as self-retracting lifeline, and Lanyards are unsuitable for operation at angles greater than this.
Line height at 30 degrees
Horizontal distance from Anchor in one direction
Horizontal distance from Anchor in both direction
|2.5 mtr||2.9 mtr||1.4 mtr||2.8 mtr|
|3.0 mtr||3.5 mtr||1.7 mtr||3.4 mtr|
|3.5 mtr||4.0 mtr||2.0 mtr||4.0 mtr|
|4.0 mtr||4.6 mtr||2.3 mtr||4.6 mtr|
Omega cast-in anchor
The Omega cast-in anchor system has been designed specifically to provide anchorage positions at floor level.
The anchor consists of a visible plastic protective housing containing a steel element that when embedded in concrete provides a connection point for a webbing sling, that in turn connects to a Temporary Lifeline, Lanyard or Work Positioner.
Cast-in anchorages offer the opportunity to plan safety anchor points early in the construction process meaning that concrete drilling and load testing is avoided.
Working in conjunction with us, we can provide advise for anchor point positions supported with setting-out plans in autocad format for site users.
Anchors are set in a pair’s or as single lanyard points in pre-designed positions to provide anchor points around the buildings perimeter.
They are simply pushed into wet concrete until the cover cap is level with the finished floor level.
When cast-in pairs for lifeline anchorage, it is advisable to align the steel bars in the parallel direction to the lifeline.
Restraint Sling Assemblies link the pairs of anchorages at each end of the lifeline. These are threaded into the anchors
And connected together as a pair using a 35kN rated karabiner
A temporary Lifeline is connected to the restraint slings and when tensioned forms the anchorage running line for up to four operatives simultaneously.
A temporary Lifeline is attached to each end of the sling assembly and tensioned.
This forms the anchorage running line onto which the operative working on the perimeter attaches to, connecting the rear harness point to the lifeline with an Adjustable Work Positioning lanyard.
The user is always in control
The Scissorsafe anchorage tool will not allow connection until it is fully engaged and cannot close or slip until the user purposely removes the connector. When then Scissorsafe tool is locked into the concrete it provides a 12kN capacity anchorage in any direction, compliant to EN 795 Class B
Before fixing the two part moulds to the formwork, carefully plan their positions, the best position being directly above the head of the user. Avoid placing them too close to concrete edges and joints, or into concrete less than 170mm thick. The ScissorSafe anchorage system is not intended for use in lightweight concrete.