ScaFixStair tower
PERI UP Flex 75 stair tower
PERI UP Flex 75 stair tower: platform 2.5 × 1.5 m, heights 4.3–20.3 m, with the parts per height from the manufacturer's tables. A stair tower is anchored to the building or scaffold, as the manual requires.
By Ole Emil Frikstad Urstad · How the numbers are computed ·
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How many parts does a PERI UP Flex 75 stair tower at 8.3 m need?
At 8.3 m platform height (outdoors) on the 2.5 × 1.5 m platform, the manufacturer's table lists 186 parts, about 1,126 kg in total: Frames 25, Braces 75, Guardrails 11, Toe boards 17, Stairs 16, Castors and base 4, Other 38. The stair tower is anchored, not ballasted.
Platform heights in the manufacturer's tables
Each cell is the range of platform heights the manual has a row for, with the number of rows. ScaFix offers exactly these rows and no others.
| Platform | Indoors | Outdoors | Rows |
|---|---|---|---|
| 2.5 × 1.5 m | 4.3–20.3 m (8) | 4.3–20.3 m (8) | 8 rows |
Parts list: PERI UP Flex 75 at 8.3 m (outdoors)
The manufacturer's table for this row, with stabilisers and ballast weights; the part names are the manufacturer's.
| Group | Article no. | Part | Qty |
|---|---|---|---|
| Frames | 100000 | Top Standard UVH 100 | 5 |
| Frames | 100009 | Standard UVR 200 | 12 |
| Frames | 100012 | Standard UVR 300 | 4 |
| Frames | 100014 | Base Standard UVB 24 | 4 |
| Braces | 114595 | Ledger UH 50 Plus | 2 |
| Braces | 114629 | Ledger UH 75 Plus | 5 |
| Braces | 114632 | Ledger UH 100 Plus | 2 |
| Braces | 114641 | Ledger UH 150 Plus | 33 |
| Braces | 114648 | Ledger UH 250 Plus | 33 |
| Guardrails | 100742 | Stair Guardrail UAG | 8 |
| Guardrails | 100830 | Stair Guardrail UAH | 3 |
| Toe boards | 110073 | Toeboard Steel UPY 100 | 1 |
| Toe boards | 110160 | Toeboard Steel UPY 150 | 8 |
| Toe boards | 110208 | Toeboard Steel UPY 250 | 7 |
| Toe boards | 110514 | Toeboard Steel UPY 75 | 1 |
| Stairs | 111117 | Staircase UAS 75 x 250/200, Alu | 4 |
| Stairs | 123771 | Steel Deck UDG 25 x 250 | 12 |
| Castors and base | 100411 | Adj. Base Plate UJB 38-50/30 | 4 |
| Other | 100863 | Spindle Locking UJS | 4 |
| Other | 109764 | UH Spigot | 2 |
| Other | 110792 | Ledger to Ledger Coupler UHA Half w. Spigot | 2 |
| Other | 110793 | Ledger to Ledger Coupler UHA Half | 14 |
| Other | 111053 | Locking Pin Ø 48/57 | 16 |
Limits that apply
- A stair tower is anchored to the building or the scaffold. Anchorage, foundations and the connection are not in the manufacturer's parts list and are designed separately.
- Load as the manufacturer states it: Maximum persons and calculated leg load per height: see the manufacturer's sheet
- ScaFix lists the parts from the manufacturer's tables. It is not a structural approval: the assembly and use instructions on site govern, and a competent person inspects the tower.
Sources
The manufacturer's documents (PERI UP Flex Stair 75 compliance sheets and PERI UP Flex Stair 75 IFAU v2.0) and the standard, read on 23 October 2026.
Questions and answers
How high can a PERI UP Flex 75 stair tower go?
The manufacturer's tables run from 4.3 m to 20.3 m. ScaFix offers exactly those heights.
Is a stair tower ballasted?
No. A stair tower is anchored to the building or the scaffold; the anchorage is designed separately, as the manual says.
Does ScaFix approve the stair tower?
No. ScaFix gives the parts list from the manufacturer's tables; it is not a structural approval. Follow the assembly instructions on site.