At a glance
| Step | Calculation | Example |
|---|---|---|
| Levels | Platform height ÷ frame height, rounded up | 6 m ÷ 2 m = 3 |
| Bays | Wall length ÷ bay length, rounded up | 12 m ÷ 3 m = 4 |
| Frame sets | Levels × bays | 3 × 4 = 12 |
The formula: levels × bays
A scaffold frame set is one level of one bay: two end frames joined by cross braces, with the work platform on top. Stack them to gain height; line them up to cover length. The question 'how many do I need?' comes down to two divisions and one multiplication:
- Levels = height the top platform must reach ÷ height of one frame. Always round up.
- Bays = length of wall to cover ÷ length of one bay (the span of each pair of cross braces). Round up as well.
- Frame sets = levels × bays.
- Ask for the frame and brace dimensions when you quote: with the measurements of the equipment you'll actually get, the count is exact.
Step-by-step example
Example dimensions, only to show the math (confirm the ones for the equipment you'll get): you're plastering a 12 m wall and the top platform must sit at 6 m. If each frame rises 2 m, you need 6 ÷ 2 = 3 levels. If each bay covers 3 m, the wall needs 12 ÷ 3 = 4 bays. Result: 3 × 4 = 12 frame sets.
If the wall were 13 m, the division gives 4.3 bays: that's 5, not 4. That bay you 'almost don't need' is exactly where the crew ends up leaning out from the edge of the platform — and that's where accidents happen.
Platform height is not wall height
The most common mistake is dividing the building height by the frame height. What matters is how high the platform must sit for the worker to be comfortable: a little below the highest point they'll touch, without reaching above their shoulders. If the work moves through heights (plastering top to bottom, say), the full tower goes up from the start and the platforms move as the job progresses.
Mobile tower, straight wall or full perimeter
- Mobile tower (single bay, on casters): for installations, ceilings and indoor painting that move across the floor. Frame sets = levels × 1. Ask for casters in the same quote.
- Straight wall (several bays in a row): plastering, exterior painting, cladding or windows on a long wall. Frame sets = levels × bays.
- L-shaped wall or full perimeter: count each face separately and add them up. Tell your advisor where the corners are so the tie-in is worked out.
- Tall, narrow towers lose stability: if the height grows a lot relative to the base, the base must be widened or the scaffold tied to the structure. Raise it when you quote.
How scaffolding rents at RentaCentro
Scaffolding is quoted by the module — each module is 2 frames and 2 cross braces in galvanized steel — for as long as your job lasts. Modules are inspected between rentals, so they arrive straight, with no bent pieces. On a continuous wall, neighbouring bays share a frame, so the levels × bays count leaves you some margin: your advisor fine-tunes the exact pieces with your measurements.
When there's a current published rate (per module, per 15 days or per month), you'll see it on the scaffolding page with its validity date and whether VAT is added. Otherwise it's quoted on your quantity and term.
Common mistakes
- Counting building height instead of platform height.
- Forgetting the work platforms: without a deck on the level, the frame set is useless for work.
- Ordering frames without braces, or removing braces 'to get through': the brace is what keeps the frame set square.
- Not planning access: the crew needs a ladder to climb, not the cross braces.
- Ordering the bare minimum and leaving out the extra bay at the corner or the end.
- Standing on a bucket or ladder on the platform because 'one level was missing'.
Frequently asked questions
What is a scaffold frame set?
One level of scaffolding in one bay: two end frames joined by cross braces, with the work platform on top. Stack them to gain height; line them up to cover the length of the wall.
How is scaffolding rental charged?
By the module (2 frames + 2 cross braces) for the length of the job. If there's a current published rate, it's on the scaffolding page with its validity and VAT treatment; otherwise it's quoted on your quantity and term.
Can you help me work out how many modules I need?
Yes. Tell us the platform height, the wall length and whether it's a mobile tower or a fixed façade, and we'll work out the exact modules in your quote.
Scaffolding or a scissor lift?
For façade work lasting weeks, scaffolding usually wins on cost: it stays up for the whole job. For one-off jobs on firm floors, or where you keep changing spots, the 12.4 m electric scissor lift goes up and down with nothing to assemble.
Is the scaffolding in good condition?
They're galvanized steel modules inspected between contracts: straight structure, no bent pieces or questionable welds.
Equipment in this guide
Add them to your quote with the + button and send them together, with dates, in a single request.
