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Manufacturer comparison

SIGMA systems compared head to head

Every pair of SIGMA systems in the ScaFix catalogue: which bay lengths and depths they share, which only one of them has, and what the planning engine counts for each on the same example house, parts group by parts group.

· How the numbers are computed ·

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

How do the SIGMA systems differ?

ScaFix has 2 SIGMA systems: SIGMA 73LB and SIGMA RTM. On the same example house (11.4 m × 5.3 m), SIGMA 73LB needs 292 parts and SIGMA RTM 565. Both offer the 3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.09 m, 0.73 m bay lengths.

Pair by pair: bay lengths and depths

Each pair of SIGMA systems, from the catalogue the engine plans with. «Only in» lists the bay lengths one system has and the other lacks; the last column is the parts total of each on the example house.

SIGMA systems compared head to head
PairTypeShared bay lengthsOnly in the firstOnly in the secondShared depthsParts on the house
SIGMA 73LB – SIGMA RTMDifferent types: Frame / Ringlock (rosette)3.07 m, 2.57 m, 2.07 m, 1.57 m, 1.09 m, 0.73 m–1.4 m, 1.04 m0.73 m292 / 565

Parts group by group on the same house

Each SIGMA system planned on ScaFix’s example house (11.4 m × 5.3 m) with the default settings. The rows are the groups of the app’s parts list; «–» means the system has no part in that group. How the example is set up is on the methodology page.
Parts groupSIGMA 73LBSIGMA RTM
Frames and standards60120
Decks3233
Guardrails5696
Toeboards3232
Diagonals1616
Ends88
Wall ties and fittings4864
Base jacks and legs4040
Ledgers and beams–156
Bays on the long wall55
Depth0.73 m0.73 m
All parts292565
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.

Questions and answers

Can I mix parts from two SIGMA systems in ScaFix?

No. ScaFix plans each wall with one system’s own parts and never mixes systems in a parts list. Whether two systems of one maker may be combined on site is for SIGMA’s instructions to say. ScaFix is a planning aid, not a structural approval.

Why do the parts totals of the SIGMA systems differ?

A wall is filled with each system’s own bay lengths, so a shorter bay means more bays, standards and ledgers; the depth changes the transoms and decks, and frame systems count frames where modular systems count standards and ledgers. The totals say nothing about price or load class.

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