Short answer
Tie-in spacing for a mast climbing work platform (MCWP) comes from the manufacturer's installation documentation and a qualified assessment of the building, not from a rule of thumb. What site teams can do early is confirm where ties can physically go, what the facade structure is, and which mast configuration is planned, so installation does not stop on day one.
Why confirm tie-ins before delivery?
Because the mast can only be built as high as it can be tied to the structure. If tie points are missing, blocked or on a surface that cannot take the load, installation pauses while the layout is revised and the crane, crew and delivery dates slip with it.
What should the site team check on the facade?
- Which structural elements (slab edges, columns, walls) are available along the full working height
- Balconies, glazing, cladding, setbacks and overhangs that sit on the planned mast line
- Facade elements that will be added or removed during the build sequence
- Safe access to each tie point from the platform during climbing
- Marked photos or drawings of the facade, shared with the manufacturer
How does single vs twin mast change the tie-in plan?
A P1500 single-mast platform has one mast line to tie, up to 10 m platform width. A P3000 twin-mast platform has two mast lines and up to 30 m width, so both lines need suitable tie points and the facade length between them must suit the platform. The single-mast vs twin-mast guide covers the wider decision.
What information should go to the manufacturer?
Building height, facade drawings or photos with the structure marked, the planned platform width, the materials and load on the deck (see the load capacity guide) and the install window. With these, the tie-in layout can be checked before the platform ships.
Once the tie plan is agreed, the installation guide shows where ties fit in the assembly sequence, and the dismantling guide shows when they are released at the end of the job.
Frequently asked questions
Is there a standard tie-in spacing I can use?
No general article can give one. Spacing and anchor details follow the manufacturer's documentation and a qualified engineer's review of the specific building.
Who decides the anchor type?
A qualified engineer, based on the manufacturer's documentation and the building structure. Site teams provide facade information and access.
Do hoists use the same anchorage distance?
Not necessarily. ALPMAKSAN H1500 and H2000 hoists list a 6 m anchorage distance in their specifications; mast climbing work platform tie-ins are specified separately in their own documentation.
Sources
- OSHA eTool: Mast climbing work platforms
- ALPMAKSAN P1500 and P3000 product pages
If the facade, height or tie-in conditions are unclear, request a survey from ALPMAKSAN.