Checking that a scaffold platform is level before you work on it is one of the most important safety steps you can take. An unlevel platform increases the risk of tools rolling off, materials sliding, and — most seriously — workers losing their footing and falling. In New Zealand, scaffold safety is governed by WorkSafe NZ guidelines and the Health and Safety at Work Act 2015, so getting this right isn't just good practice — it's a legal obligation.
Why a Level Platform Matters
Even a slight tilt on a scaffold platform can cause significant hazards:
- Unstable footing for workers carrying tools or materials
- Rolling objects — buckets, paint tins, and tools can slide off the edge
- Uneven load distribution, which can stress the scaffold frame unevenly
- Cumulative lean — if multiple lifts are all slightly off, the structure can become dangerously out of plumb
A level check takes only a few minutes and could prevent a serious incident.
Tools You'll Need
You don't need specialist equipment for a basic level check:
- Spirit level (at least 600 mm long; longer is better for spanning planks)
- Digital level / inclinometer (more accurate, useful on uneven ground)
- Tape measure (to check plank overhang and gaps)
- Your eyes — a visual inspection is always the first step
Step-by-Step: How to Check Your Scaffold Platform
1. Start with a Visual Inspection
Before stepping onto the platform, stand back and look at the whole scaffold from ground level. Check:
- Does the structure look plumb (vertical) on both faces?
- Are the standards (vertical tubes) sitting evenly on base plates or sole boards?
- Do the ledgers (horizontal tubes) look parallel to the ground?
- Are there any obvious twists, bows, or gaps in the platform planks?
If anything looks obviously wrong at this stage, do not proceed — call a qualified scaffolder.
2. Check the Base and Ground Conditions
An unlevel platform almost always starts with an unlevel or unstable base. Check that:
- Base plates are sitting flat on sole boards (timber pads that spread the load)
- Sole boards are on firm, compacted ground — not soft soil, mud, or loose fill
- Adjustable base jacks (screw jacks) are wound to compensate for any ground slope, and are not extended beyond the manufacturer's maximum — typically no more than one-third of the jack's total length, but always check the specific product instructions
- The ground hasn't shifted or softened since the scaffold was erected (e.g., after rain)
3. Use a Spirit Level on the Platform Planks
Once you're satisfied the base looks sound, step onto the lowest lift and place your spirit level:
- Along the length of the platform (front to back) — the bubble should sit centred
- Across the width of the platform (side to side) — again, bubble centred
- Check in multiple spots along the platform, not just one end
A small tolerance is acceptable in practice, but if the bubble is consistently sitting outside the marked lines, the platform needs adjustment before work begins.
4. Check Platform Plank Condition and Fit
Levelling isn't just about angle — the planks themselves must be:
- Fully supported at each end, with a minimum 150 mm overhang past the transom (cross tube), but no more than four times the plank thickness to avoid a trip hazard
- Free of gaps wider than 25 mm between planks (to prevent tools or feet falling through)
- Not bowed, cracked, or warped — a warped plank can rock underfoot even on a level frame
- Secured so they can't be displaced by wind or movement
5. Check Guardrails and Toeboards
While you're doing your level check, confirm that:
- Top guardrails are at least 900 mm above the platform surface (1 m is best practice)
- Mid-rails are in place
- Toeboards (kick boards) are fitted to prevent tools rolling off the edge
These requirements align with WorkSafe NZ scaffolding guidelines for working at height.
6. Re-check After Any Adjustment
If you adjust the base jacks or reposition planks, always re-run your spirit level checks before resuming work. Changes in one area can affect the level elsewhere on the structure.
Scaffold Types and Complexity
The checks above apply to basic tube-and-coupler and system scaffold (such as Kwikstage-style) used for typical residential work. More complex scaffolds — multi-lift, cantilevered, or those over 5 m in height — have additional requirements and should only be erected, altered, or dismantled by a competent scaffolder. In New Zealand, scaffolding over 5 m requires a Scaffolding Certificate of Competency under the Health and Safety at Work (General Risk and Workplace Management) Regulations 2016.
When to Call a Professional
Call a licensed, competent scaffolder if:
- The scaffold is over 5 m in height
- You cannot get the platform level despite adjusting the base jacks
- The ground is sloped, soft, or unstable
- The scaffold has been altered, damaged, or exposed to high winds or heavy rain
- You're unsure about any aspect of the structure's integrity
Never attempt to modify the scaffold frame itself (cutting tubes, repositioning standards) unless you are trained to do so. A qualified scaffolder can inspect, adjust, and certify the structure is safe. You can find experienced local scaffolders on tradedirectory.co.nz.
A Quick Reference: Level Check Summary
| Check | What to Look For | Tool |
|---|---|---|
| Ground and base plates | Firm, flat, sole boards in place | Visual |
| Base jacks | Not over-extended, adjusted for slope | Visual + measure |
| Platform along length | Spirit level bubble centred | Spirit level |
| Platform across width | Spirit level bubble centred | Spirit level |
| Plank gaps | No gap wider than 25 mm | Tape measure |
| Plank overhang | 150 mm minimum, not excessive | Tape measure |
| Guardrails | Required height per WorkSafe NZ guidelines, mid-rail fitted | Tape measure |
