High-Rise Scaffolding System
Cantilever scaffolding is the access scaffold for high-rise work, where the scaffold cannot stand on the ground and hangs off the building structure instead. Every few floors, steel beams cantilever out from the slab or structural beam to carry the scaffold above, and the next lift is built off them. Lengge builds the flower-basket type: a short I-beam braced by an adjustable tie rod and anchored with embedded parts. It uses far less steel than a long through-wall beam, leaves the wall intact, and the parts come back down for reuse.
We supply the full parts set for the system — cantilever I-beams, tie rods, closed turnbuckles, embedded parts, fasteners and positioning pins — galvanized and cut to your drawing, factory-direct for high-rise, commercial and renovation projects worldwide.
| Item | Specification |
|---|---|
| Main cantilever beam | 16# I-beam, Q235 |
| Cantilever length | 1300 – 3000 mm (custom) |
| Tie rod | φ20 rod, M20 thread, adjustable turnbuckle |
| Anchor / embedded bolt | M20 high-strength |
| Tie rod angle | ≥ 45° |
| Lift height without tie rod | ≤ 10 m |
| Surface finish | Galvanized / painted |
Beam section, cantilever length and tie-rod layout are set to the project design. Beam spacing up the building follows the structural drawing.
Cantilever scaffolding is an access scaffold that hangs off a building instead of standing on the ground. On high-rise work the scaffold cannot reach up from grade, so steel beams cantilever out from the floors to support it, and the scaffold is built up in lifts off those beams. It lets crews reach the full height of a tall building safely.
Traditional cantilever scaffolding runs a long I-beam through the external wall and anchors it to the slab. The flower-basket type bolts a short beam to the side of the structural beam and braces it with an adjustable tie rod. The flower-basket method uses far less steel, leaves the wall and slab intact, and the parts come back down for reuse, while the traditional method cuts through the building and needs a crane.
A set is built around the cantilever I-beam, plus an adjustable tie rod with a closed turnbuckle, the embedded parts that anchor it to the structure, the double-head bolts and fasteners, double-ear rings, and positioning pins that locate the standards on the beam. We supply all of it matched as one set.
It is designed for the full height of high-rise buildings. Cantilever beams are set at intervals up the structure, and the scaffold is built in lifts off each level, so the load is shared down the building rather than carried all the way from the ground. The exact spacing follows the project design.
Both. We supply the complete cantilever scaffolding set matched together, or individual parts when you need to top up beams, tie rods, embedded parts or pins. Buying the set means the parts fit and ship together; buying singly suits restocking.
Stock parts ship quickly; custom lengths and galvanizing add some production time, which we confirm when you order. Beams and fittings bundle into containers and pack dense, so freight per ton stays low. We handle export packing, marking and documents for overseas projects.
Cantilever scaffolding solves a basic problem on tall buildings: the scaffold cannot run all the way up from the ground, so the building has to carry it. This guide explains how the system works, the two ways it is built, the parts that make up a set, and the rules that keep it safe. It is written from what we deal with supplying these projects.
On a high-rise, building a scaffold from grade gets unsafe and uneconomical past a certain height. Cantilever scaffolding instead anchors to the structure: steel beams cantilever out from the floors, the scaffold sits on those beams, and it is built up in lifts. Beams are placed at intervals up the building, so each section of scaffold loads into the nearest floor rather than carrying weight all the way down. That is what lets crews reach the top of a tower, work over a podium, or scaffold a street-facing facade where there is no ground to build from.
There are two ways to build it, and they behave very differently:
| Aspect | Traditional cantilever scaffolding | Flower-basket cantilever scaffolding |
|---|---|---|
| Beam | Long I-beam through the wall, slab-anchored | Short I-beam bolted to the structural beam side |
| Steel use | Heavy, 3–9 m members | Light, over half less steel |
| Building impact | Wall and slab penetrated | Wall and slab left intact |
| Erection | Tower crane to place beams | Hand-set, no crane |
| Reuse | Often cut to remove | Bolted, fully reusable |
The traditional method threads a long I-beam through the external wall and bolts it to the floor slab. It works, but it eats steel, cuts holes through walls and slabs, and needs a crane to place each beam. The flower-basket method bolts a short beam to the side of the structural beam and carries the load on an adjustable tie rod, forming a braced triangle. Across a whole tower it saves more than half the steel, keeps the building sealed, and the parts come back down for the next job.
A cantilever scaffolding set is a group of matched parts, not a single product:
The system is only as safe as the way it is set. The points that matter most on site:
Because the parts have to match each other and your structure, the cleanest way to buy is the complete set from one maker, so the beam, tie rod, embedded parts and pins all fit and ship together. For projects already running, buying individual parts to restock beams, tie rods or pins keeps the line moving. Either way, confirm the beam section and cantilever length against your design, the finish against the site conditions, and that a mill certificate ships with the steel.
