Manufacturer

SIGMA scaffold systems

The SIGMA systems you can plan in ScaFix, with the numbers the planning engine uses for each one: type, bay lengths, depths and the approval or manual its wall-tie rule cites.

By Ole Emil Frikstad Urstad · How the numbers are computed · Last updated 25 October 2026

SIGMA 73LB around the example house, as ScaFix draws it in 3D.

Which SIGMA scaffold systems can ScaFix plan?

ScaFix models 2 SIGMA scaffold systems: SIGMA 73LB and SIGMA RTM. They cover frame scaffolding and ringlock (rosette) scaffolding, with bay lengths from 0.73 m to 3.07 m. Each is planned on your own walls by the same engine as the app.

SIGMA at a glance

Systems in ScaFix: 2
Types: Frame, Ringlock (rosette)

SIGMA systems in ScaFix

The bay lengths and depths are every size the catalogue offers for the system, across its variants. «Approval» is the number the system’s tie rule cites; «–» means the rule cites a manual or no document.
System	Type	Bay lengths	Depths	Approval
SIGMA 73LB	Frame	3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.09 m, 0.73 m	0.73 m	–
SIGMA RTM	Ringlock (rosette)	3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.4 m, 1.09 m, 1.04 m, 0.73 m	1.09 m, 0.73 m	–

SIGMA systems on the same example house

Each system planned on ScaFix’s example house (11.4 m × 5.3 m) with the default settings. The totals differ with bay length, depth and part design; a lower total is not better by itself. How the example is set up is on the methodology page.
System	Long-wall bays	Depth	Parts in total
SIGMA 73LB	5	0.73 m	292
SIGMA RTM	5	0.73 m	565

SIGMA RTM scaffolding around a house of 11.4 × 5.3 m with a gabled roof (eaves 4.5 m, ridge 6 m), drawn by the ScaFix 3D model — SIGMA RTM around the example house, as ScaFix draws it in 3D.

Sources

Tie rule for SIGMA 73LB: SIGMA 73LB DTR «Instrukcja montażu i użytkowania rusztowania SIGMA 73LB» §2.2.2 p. 12, §5.6, Rys. 21 p. 25. Tie rule for SIGMA RTM: SIGMA RTM DTR «Instrukcja montażu i użytkowania rusztowania modułowego SIGMA RTM» 09/2024 §5.3 p. 29 (PDF). ScaFix is a planning tool, not a structural approval.

Questions and answers

How many SIGMA systems does ScaFix have?

2: SIGMA 73LB and SIGMA RTM. The length variants of one system count once.

Which bay lengths do SIGMA systems use in ScaFix?

SIGMA 73LB: 3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.09 m, 0.73 m; SIGMA RTM: 3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.4 m, 1.09 m, 1.04 m, 0.73 m.

Is ScaFix made by SIGMA?

No. ScaFix is independent planning software by Ole Emil Frikstad Urstad; it is not made, sold or endorsed by SIGMA. The bay lengths, depths and tie rules come from the documents cited on this page. ScaFix is a planning aid, not a structural approval.

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