ScaFixScaffold system
SIGMA RTM in ScaFix
ScaFix plans SIGMA RTM scaffolding with the system's own bay lengths (0.73–3.07 m) and depths (1.09 m and 0.73 m), draws the scaffold in 3D and works out the parts list. Below is our example house with SIGMA RTM.
By Ole Emil Frikstad Urstad · How the numbers are computed ·
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How many parts does SIGMA RTM need for a house?
ScaFix plans SIGMA RTM with the bay lengths 0.73–3.07 m and the scaffold depth 0.73 m. On ScaFix’s 11.4 m × 5.3 m example house, scaffolded all round, SIGMA RTM needs 565 parts; Layher Allround needs 481 on the same house.
The system in ScaFix
- Manufacturer
- PHU SIGMA
- System type
- Modular scaffold with rosettes
- Variants in the system picker
- SIGMA RTM (Wedge)
- Bay lengths
- 3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.4 m, 1.09 m, 1.04 m, 0.73 m
- Depths
- 1.09 m, 0.73 m
- Source of the tie rule
- SIGMA RTM DTR «Instrukcja montażu i użytkowania rusztowania modułowego SIGMA RTM» 09/2024 §5.3 p. 29 (PDF)
Close-ups from the 3D model
The example house with SIGMA RTM
ScaFix's own example: the 11.4 m × 5.3 m house with a gabled roof, eaves 4.5 m and ridge 6 m, scaffolded all round. The numbers below are the app's own, worked out by the same engine as in projects.
- System
- SIGMA RTM (Wedge)
- Scaffold depth
- 0.73 m
- Decks at
- 2.5 m, 4.5 m
- Top deck
- 4.5 m
- Access
- Decks with ladders
- Parts in all
- 565
The walls and the bays
| Wall | Length | Height | Bays |
|---|---|---|---|
| Wall 1 | 11.4 m | 4.5 m | 1 × 0.73 m + 3 × 3.07 m + 1 × 2.57 m |
| Wall 2 (gable) | 5.3 m | 6 m | 1 × 0.73 m + 1 × 3.07 m + 1 × 2.57 m |
| Wall 3 | 11.4 m | 4.5 m | 1 × 0.73 m + 3 × 3.07 m + 1 × 2.57 m |
| Wall 4 (gable) | 5.3 m | 6 m | 1 × 0.73 m + 1 × 3.07 m + 1 × 2.57 m |
The parts list for the example house with SIGMA RTM
The whole parts list for ScaFix's own example, grouped the way the app shows it.
| Part | Length | Count |
|---|---|---|
| Frames and standards | ||
| Standards | 2 m | 80 |
| Standards | 1 m | 40 |
| Ledgers and beams | ||
| Ledgers | 3.07 m | 48 |
| Ledgers | 2.57 m | 24 |
| Ledgers | 0.73 m | 24 |
| Transoms | 60 | |
| Decks | ||
| Decks without ladder | 3.07 m | 15 |
| Decks without ladder | 2.57 m | 8 |
| Decks without ladder | 0.73 m | 8 |
| Decks with ladder | 3.07 m | 2 |
| Guardrails | ||
| Front guardrails | 3.07 m | 48 |
| Front guardrails | 2.57 m | 24 |
| Front guardrails | 0.73 m | 24 |
| Toeboards | ||
| Toeboards | 3.07 m | 16 |
| Toeboards | 2.57 m | 8 |
| Toeboards | 0.73 m | 8 |
| Diagonals | ||
| Diagonals | 2.57 m | 8 |
| Diagonals | 0.73 m | 8 |
| Ends | ||
| End guardrails | 8 | |
| Wall ties and fittings | ||
| Wall ties | 28 | |
| Wall-anchor fittings | 28 | |
| Right-angle couplers for wall ties | 8 | |
| Base jacks and legs | ||
| Base jacks / legs | 40 | |
This is our example. The parts list for your own walls follows your measurements and settings.
SIGMA RTM compared with similar systems on the same house
The same example house, computed by the same engine with each system's bay length and default depth. The difference in piece count comes from the bay length, the depth and how the system is built.
| System | Bays on the long wall | Depth | Parts in all |
|---|---|---|---|
| SIGMA RTM | 1 × 0.73 m + 3 × 3.07 m + 1 × 2.57 m | 0.73 m | 565 |
| Layher Allround | 4 × 3.07 m | 0.73 m | 481 |
| PERI UP | 1 × 0.75 m + 3 × 3 m + 1 × 2.5 m | 0.75 m | 567 |
| Plettac Contur | 1 × 0.75 m + 3 × 3 m + 1 × 2.5 m | 0.74 m | 561 |
SIGMA RTM: parts by wall size
Scaffold depth 0.73 m, access: decks with ladders. Each wall is a whole number of 3.07 m bays, so the scaffold covers it exactly. One straight wall, no corners.
| Wall (length × height) | Bays | Decked lifts | Frames and standards | Decks | Base jacks and legs | Wall ties and fittings | Parts in all |
|---|---|---|---|---|---|---|---|
| 6.14 × 4 m | 2 × 3.07 m | 1 | 12 | 3 | 6 | 7 | 56 |
| 12.28 × 6 m | 4 × 3.07 m | 2 | 30 | 9 | 10 | 20 | 148 |
| 18.42 × 8 m | 6 × 3.07 m | 3 | 56 | 19 | 14 | 30 | 276 |
| 24.56 × 10 m | 8 × 3.07 m | 4 | 90 | 33 | 18 | 50 | 448 |
| 30.7 × 12 m | 10 × 3.07 m | 5 | 132 | 51 | 22 | 56 | 647 |
How to compare the setup
- These are fixed ScaFix examples, not customer jobs. Use the wall dimensions and roof shape stated with each example.
- Compare the same system variant, bay lengths, scaffold depth, deck heights and access. Matching house dimensions alone do not give matching parts lists.
- The displayed quantities are calculated by ScaFix's engine. Check the setup against the manufacturer's assembly instructions and the actual job; a parts list is not a structural calculation.
Limits
- The number of wall ties follows the system's tie rule. Their positions must be checked against the manufacturer's assembly instructions.
- Round corners, silos and hanging scaffolds are in Pro. A round scaffold is not a standard configuration and needs a calculation or the supplier's documentation. A hanging scaffold (Layher Allround and HAKI Universal) always needs a structural calculation from the supplier or an engineer.
Questions and answers
Which bay lengths does SIGMA RTM have in ScaFix?
ScaFix uses the bay lengths 3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.4 m, 1.09 m, 1.04 m and 0.73 m and the depths 1.09 m and 0.73 m for SIGMA RTM.
How many parts does the example house need with SIGMA RTM?
With SIGMA RTM, the 11.4 m × 5.3 m example house needs 565 parts in all, split into the groups in the table. Your own building gets its own parts list.
How many parts does SIGMA RTM need for a 12.28 m × 6 m wall?
A 12.28 m long, 6 m high wall with SIGMA RTM (4 × 3.07 m) needs 148 parts in all according to ScaFix: 30 frames and standards, 9 decks, 10 base jacks and legs and 20 wall ties and fittings, with decks on 2 lifts. A 30.7 m wall 12 m high needs 647.
Is the SIGMA RTM plan from ScaFix approved for erection?
ScaFix is a planning tool, not a structural calculation or approval. Always check the scaffold against the manufacturer's assembly instructions and the rules that apply before you erect it.