A base jack helps a scaffold start from the intended level, but it cannot turn an unknown support condition into an approved one. Before an access package is assembled, a short ground evidence card can give the site team, designer, and supplier the same starting picture without asking a product description to answer a project-specific question.
Begin with the support condition, not the adjustment
A base jack is a ground-level adjustable component in a scaffold arrangement. That simple role is useful, yet it is often discussed only after a crew finds a change in level or a damaged surface. A better sequence is to record what the support points actually meet, then route the record to the person responsible for assessing the arrangement.
This is not a design calculation and it does not authorise erection. It is a practical handover tool: it keeps a visible distinction between observed conditions, supplied product information, and the project decision that must follow. That distinction is especially helpful when the work moves from planning to a live site.
What to place on a ground evidence card
- Location: identify the work area and each support zone using the project’s own drawing, grid, or location reference.
- Observation: note the surface condition and any visible change in level, obstruction, damage, or uncertainty. Use marked photographs where the project allows them.
- System context: state the scaffold family and the current drawing or erection information being used; do not label a component compatible solely from appearance.
- Decision route: name the designated competent person, engineer, or project reviewer who must determine whether the proposed support arrangement is acceptable.
Keep product selection separate from site approval
When a team asks about a base jack, the supplier conversation should say whether the need is to match an identified existing component or to support a new system package. A clear request can include the relevant system reference and product information needed for comparison. It should not imply that a supplier has approved the ground, loading, layout, or final use.
The same discipline applies to scaffold tube clamps. They may be part of a tubular access arrangement, but their presence does not remove the need to review the base condition, the current erection information, and the project’s inspection process. Each component has a role; the site arrangement needs an accountable decision.
Use the card at each change point
Ground information can change between the first walkdown, delivery, and setup. A new excavation edge, altered paving, temporary covers, weather effects, or a revised access route can all mean the original observation no longer describes the workfront. Rather than relying on a verbal update, issue a revised card that identifies what changed and who needs to review it.
For procurement, the card also gives a shoring system manufacturer a cleaner basis for providing product information. Attach only the information that is appropriate to share, preserve the drawing revision, and list open questions plainly. This reduces the temptation to fill gaps with a familiar item name or an old purchase record.
Close the loop before erection proceeds
The useful final field on the card is a decision status. It can show that the condition is awaiting review, that further information is required, or that the project’s authorised process has released the next action. It should also point to the governing document or inspection record, rather than trying to replace it.
That small record makes handovers calmer: crews see what was observed, supervisors see what still needs a decision, and procurement can keep product questions in their proper lane. It is a simple way to make the first scaffold components part of a clearer project conversation.
Bythai supplies scaffold systems, tube-and-clamp products, and related accessories for export projects. Share your system context and approved project requirements when requesting product information, then have the responsible project team confirm the final support arrangement.