Scaffold system

WACO Narrow Frame scaffold: bay lengths, depths and parts list

ScaFix plans WACO Narrow Frame scaffolding with the system's own bay lengths (10', 8', 7' and 5') and depth (2'-3 1/2" (0.7 m)), draws the scaffold in 3D and works out the parts list. Below is our example house with WACO Narrow Frame.

By Ole Emil Frikstad Urstad · How the numbers are computed · Last updated 23 October 2026

WACO Narrow Frame around the example house, as ScaFix draws it in 3D.

How many parts does WACO Narrow Frame need for a house?

ScaFix plans WACO Narrow Frame with the bay lengths 10', 8', 7' and 5' and the scaffold depth 2'-3 1/2" (0.7 m). On ScaFix’s 37'-5" (11.4 m) × 17'-4 1/2" (5.3 m) example house, scaffolded all round, WACO Narrow Frame needs 348 parts; Waco Frame needs 352 on the same house.

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The system in ScaFix

Manufacturer: BrandSafway (WACO)
System type: Frame and brace scaffold
Variants in the system picker: WACO Narrow Frame (USA)
Bay lengths: 3.05 m, 2.44 m, 2.13 m, 1.52 m
Depths: 0.7 m
Source of the tie rule: WACO ORN1701 p. 5 (Narrow Frame 2'-3 5/8" × 6'-7")
Bay lengths in feet and inches: 10', 8', 7', 5'

Good to know

The frames are 6'4"–6'7" (about 1.93–2.0 m) high, but ScaFix plans every lift at 2.0 m for now: each lift is up to about 7 cm higher than the real frame, so check heights against the frames until the engine plans the frames' own lift.

Close-ups from the 3D model

Close-up of the corner where the long wall and the gable wall meet, with WACO Narrow Frame standards, decks, guardrails and toe boards in the ScaFix 3D model — The corner: the bays of the two walls meet, with deck, guardrail and toe board on each lift.

Close-up of the top WACO Narrow Frame lift below the eaves, with guardrails and toe boards, in the ScaFix 3D model — The top lift below the eaves, with guardrails and toe boards.

The example house with WACO Narrow Frame

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: WACO Narrow Frame (USA)
Scaffold depth: 0.7 m
Decks at: 2.49 m, 4.5 m
Top deck: 4.5 m
Access: Decks with ladders
Parts in all: 348

The walls and the bays

The walls of the example house with WACO Narrow Frame
Wall	Length	Height	Bays
Wall 1	37'-5" (11.4 m)	14'-9" (4.5 m)	1 × 5' (1.52 m) + 3 × 10' (3.05 m) + 1 × 8' (2.44 m)
Wall 2 (gable)	17'-4 1/2" (5.3 m)	19'-8" (6 m)	1 × 5' (1.52 m) + 1 × 10' (3.05 m) + 1 × 8' (2.44 m)
Wall 3	37'-5" (11.4 m)	14'-9" (4.5 m)	1 × 5' (1.52 m) + 3 × 10' (3.05 m) + 1 × 8' (2.44 m)
Wall 4 (gable)	17'-4 1/2" (5.3 m)	19'-8" (6 m)	1 × 5' (1.52 m) + 1 × 10' (3.05 m) + 1 × 8' (2.44 m)

The parts list for the example house with WACO Narrow Frame

The whole parts list for ScaFix's own example, grouped the way the app shows it.

The parts list for the example house with WACO Narrow Frame
Part	Length	Count
Frames and standards
Frames	6'-7" (2.01 m)	40
Frames	3'-3 1/2" (1 m)	4
Top-lift guardrail posts		16
Decks
Decks without ladder	10' (3.05 m)	14
Decks without ladder	8' (2.44 m)	8
Decks without ladder	5' (1.52 m)	8
Decks with ladder	10' (3.05 m)	2
Guardrails
Front guardrails	10' (3.05 m)	24
Front guardrails	8' (2.44 m)	12
Front guardrails	5' (1.52 m)	12
Toeboards
Toeboards	10' (3.05 m)	16
Toeboards	8' (2.44 m)	8
Toeboards	5' (1.52 m)	8
Diagonals
Diagonals	10' (3.05 m)	32
Diagonals	8' (2.44 m)	16
Diagonals	5' (1.52 m)	16
Ends
End guardrails		8
Wall ties and fittings
Wall ties		32
Wall-anchor fittings		32
Base jacks and legs
Base jacks / legs		40

This is our example. The parts list for your own walls follows your measurements and settings.

WACO Narrow Frame 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.

The example house with WACO Narrow Frame and similar systems
System	Bays on the long wall	Depth	Parts in all
WACO Narrow Frame	1 × 5' (1.52 m) + 3 × 10' (3.05 m) + 1 × 8' (2.44 m)	2'-3 1/2" (0.7 m)	348
Waco Frame	1 × 10' (3.05 m) + 4 × 7' (2.13 m) + 1 × 5' (1.52 m)	5' (1.52 m)	352
StepUp Frame & Brace	1 × 4' (1.22 m) + 3 × 10' (3.05 m) + 1 × 8' (2.44 m)	3' (0.91 m)	350
Metaltech Saferstack	3 × 10' (3.05 m) + 1 × 8' (2.44 m)	5' (1.52 m)	318

WACO Narrow Frame: parts by wall size

Scaffold depth 0.7 m, access: decks with ladders. Each wall is a whole number of 3.05 m bays, so the scaffold covers it exactly. One straight wall, no corners.

Parts by wall size with WACO Narrow Frame
Wall (length × height)	Bays	Decked lifts	Frames and standards	Decks	Base jacks and legs	Wall ties and fittings	Parts in all
20' (6.1 m) × 13'-1 1/2" (4 m)	2 × 10' (3.05 m)	1	6	2	6	6	32
40' (12.19 m) × 19'-8" (6 m)	4 × 10' (3.05 m)	2	15	8	10	20	93
60' (18.29 m) × 26'-3" (8 m)	6 × 10' (3.05 m)	3	28	18	14	28	172
80' (24.38 m) × 32'-9 1/2" (10 m)	8 × 10' (3.05 m)	4	45	32	18	54	293
100' (30.48 m) × 39'-4 1/2" (12 m)	10 × 10' (3.05 m)	5	66	50	22	66	424

US rules for supported scaffolds (OSHA 29 CFR 1926.451)

Height-to-base: a supported scaffold taller than 4 times its narrowest base dimension must be restrained by guying, tying, bracing or an equivalent means — §1926.451(c)(1).
Ties: the first at the horizontal member closest to the 4:1 height, then vertically every 20 ft (6.1 m) or less on scaffolds 3 ft (0.91 m) wide or less and every 26 ft (7.9 m) or less on wider ones, and horizontally every 30 ft (9.1 m) or less from one end — §1926.451(c)(1)(ii)–(iii).
Guardrails: the top rail 38 to 45 in (0.97–1.14 m) above the platform on scaffolds made or placed in service after 1 January 2000, with a midrail about halfway — §1926.451(g)(4).
Toeboards, where they are needed against falling objects: at least 3½ in (89 mm) high — §1926.451(h)(4).
ANSI/ASSP A10.8 is the US consensus standard for scaffolding safety; the manufacturer's instructions apply on top of both.
ScaFix is a planning tool, not a structural calculation or approval. A competent person must check the scaffold before use.

Source

OSHA, Safety and Health Regulations for Construction, 29 CFR 1926.451 (General requirements for scaffolds).

osha.gov/laws-regs/regulations/standardnumber/1926/1926…

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 WACO Narrow Frame have in ScaFix?

ScaFix uses the bay lengths 3.05 m, 2.44 m, 2.13 m and 1.52 m and the depth 0.7 m for WACO Narrow Frame.

How many parts does the example house need with WACO Narrow Frame?

With WACO Narrow Frame, the 11.4 m × 5.3 m example house needs 348 parts in all, split into the groups in the table. Your own building gets its own parts list.

How many parts does WACO Narrow Frame need for a 12.19 m × 6 m wall?

A 12.19 m long, 6 m high wall with WACO Narrow Frame (4 × 3.05 m) needs 93 parts in all according to ScaFix: 15 frames and standards, 8 decks, 10 base jacks and legs and 20 wall ties and fittings, with decks on 2 lifts. A 30.48 m wall 12 m high needs 424.

Is the WACO Narrow Frame 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.

Does ScaFix work in feet and inches?

Yes. ScaFix can show lengths in feet and inches (Imperial) as well as meters, and the parts list switches between the two. In the catalog, WACO Narrow Frame has bays of 10', 8', 7' and 5'.

Try one week – €9.90 See the demo house in 3D See ScaFix

€9.90 for 7 days. Does not renew.