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As buildings get taller, the risks associated with gravity and weather increase exponentially.
- Fall Prevention
- Debris Containment
- Wind Shielding
- Densely Populated Urban Areas
- High-Rise & Super-Tall Structures
- Irregular Geometries
Commercial Properties
PERIMETER SAFETY SCREEN
In modern high-rise construction, Perimeter Safety Screens (also known as Climbing Protection Panels or Shield Systems) have largely replaced traditional green netting. They are heavy-duty, vertical enclosure systems that “climb” the building as it rises, providing a solid barrier between the work floor and the outside world.
A Perimeter Safety Screen is a modular, rail-guided system that encloses the leading edge of a high-rise building. Unlike flexible nets, these are rigid panels often made of perforated steel, polycarbonate, or dense mesh attached to a structural frame.
- The system typically covers 3 to 4 floors at once
- The floor currently being poured/worked on.
- The "curing" floor directly below.
- A storage or finishing floor below that.
- Fall Prevention: It provides 100% "passive" fall protection, meaning workers don't have to rely solely on harnesses to be safe at the edge.
- Debris Containment: In a skyscraper, a dropped bolt or tool can become a lethal projectile by the time it reaches the street. The screen creates a "sealed" environment that catches everything.
- Wind Shielding: At 40+ stories, wind speeds are significantly higher than at ground level. Screens break the wind, preventing materials from blowing away and making it safer for workers to move.
- Densely Populated Urban Areas: Critical for projects in city centers where the building is right next to public sidewalks, roads, or other occupied buildings.
- High-Rise & Super-Tall Structures: Essential for any building exceeding 10–15 floors where traditional scaffolding becomes impractical or unstable.
- Irregular Geometries: Modern systems are modular and can be adapted to circular, cantilevered, or jagged floor plates.
Real Estate
HYDRAULIC PERIMETER SAFETY SCREEN
Perimeter safety screens use a self-climbing hydraulic system to ascend high-rise structures without crane assistance.
- Core Components:
- Hydraulic Power Unit (HPU) : Converts electrical power into fluidpressure via a motor and pump.
- Hydraulic Cylinders : Provide themechanical force to lift the screenassembly.
- Climbing Shoes : Anchored directlyinto cured concrete; these serve asthe fixed points for the cylinders topush against.
- Control Manifold : Regulates fluidflow to ensure all cylinders liftsynchronously, preventing tilting
- The Climbing Cycle :
- Anchoring : Secure climbing shoesto the building’s concrete anchors.
- Lifting : The HPU extends cylinders,pushing the screen upward alongvertical rails.
- Locking : Mechanical pawls or pinsengage to support the weight once the lift is complete.
- Resetting : Cylinders retract, pullingthe rails up to the next level for the subsequent jump.
- Critical Safety Feature :
- Load Holding Valves : These "overcenter" valves lock fluid within the cylinders. This ensures the screen remains stationary even in the event of a hose failure or suddenpressure loss.
Real Estate
WEST PROJECT
Perimeter safety screens use a selfclimbing hydraulic system to ascendhigh-rise structures without craneassistance.
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Safety Essentials
Precise coordination is required to mitigate risks during the jump. - Wind Limits : Operations must cease if wind speeds exceed 35–45 km/h.
- Exclusion Zones: Clear all personnel from the area directly beneath the lift.
- Slab Integrity : A structural engineer must verify that the concrete has reached therequired "pull-out" strength before anchoring.
Commercial Properties
Crane Lifting Perimeter Safety Screen
Crane-lifted safety screens are a cost-effective, high-efficiency solution for protectingthe perimeter of high-rise construction. Here is a streamlined breakdown of howthese systems function
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System Components
The system uses a "rail and bracket" design to ensure the screen remains vertical and secure. - Main Profiles (Rails) : The vertical frame that slides through guide points.
- Guiding Brackets : Anchored to the concrete slab; they prevent the screen fromswaying or pulling away from the building
- Lifting Slings/Brackets : Dedicated hook-on points for the crane.
- Safety Pawls/Bolts : Mechanical locks that secure the screen at its new height.
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The Lifting Process
Moving a screen typically involves a 2–4 floor vertical "jump". - Preparation : Install guiding brackets on the newly cured floor.
- Unlocking : Remove lower support pins so the screen is held only by the crane and guides.
- The Lift : The tower crane slides the unit vertically to the next level.
- Securing : Crew engages locking pins into the new floor anchors.
- Disengagement : Crane unhooks and moves to the next segment.
Commercial Properties
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