Construction planning guide

Gantry and Class A hoarding: what each system does

Ground-level hoarding and overhead gantry protection solve different site-interface risks. This guide explains the distinction, the questions a project team should ask and why the approving authority, site conditions and engineered design must drive the final solution.

Class A, Type A and gantry hoarding terminology

A solid barrier separating a worksite from a public area is commonly described in NSW council guidance as Type A hoarding. The term Class A hoarding is also used in searches and industry conversations, but project teams should confirm the terminology used by the relevant council or road authority.

A gantry hoarding is an overhead protective structure. In City of Sydney guidance, this is generally described as Type B hoarding. It spans a footway or roadway so people or vehicles can pass beneath a designed protective deck.

The practical distinction: a ground-level hoarding controls the perimeter and access interface; a gantry addresses an overhead exposure as well. A project may require one system, a combined arrangement or another engineered control after site-specific assessment.

Quick comparison

Ground-level barrier

Class A / Type A hoarding

A solid site fence used to separate work activities from pedestrians, neighbouring property or public space.

  • Supports perimeter control and site security
  • Defines the boundary between the work zone and public access
  • May incorporate gates, signage, viewing panels or finishes where approved
  • Does not, by itself, provide an overhead protective deck
Overhead protection

Gantry / Type B hoarding

A designed structure that creates a protected route beneath works where an overhead interface needs to be controlled.

  • Can span a footway or roadway subject to approval and design
  • Requires consideration of imposed loads, clearances and support locations
  • May support scaffolding or site facilities only when specifically designed and approved
  • Often works with a solid site fence as part of a combined arrangement

What determines the right hoarding system?

The label is not the design. Selection should follow the actual interface between construction activities and the public, then be confirmed against the relevant authority requirements and project documentation.

  • Work location: whether activities remain behind the boundary or extend above a public route.
  • Exposure: the potential for falling materials, tools, dust or other hazards to leave the work zone.
  • Public movement: pedestrian, bicycle and vehicle volumes, accessible-path needs and alternative routes.
  • Available space: footway width, kerb clearance, street furniture, trees, services and neighbouring access.
  • Structural actions: wind, impact, construction loads and any approved loads placed on a gantry deck.
  • Project duration: installation sequence, inspection access, maintenance and eventual removal.

Current official guidance should be checked for the exact site. See the City of Sydney code of practice for temporary structures and the SafeWork NSW site security checklist. Requirements can differ by authority and location.

A practical planning sequence

  1. Define the interface. Map the work zone, public routes, access points and activities that could affect people outside the site.
  2. Confirm the approving pathway. Identify the landowner, council, road authority and any other stakeholder whose requirements apply before locking in a system.
  3. Develop the site-specific design. Engage appropriately competent designers or engineers where structural design is required, and coordinate dimensions, loads, access and staging.
  4. Plan installation and changeover. Consider delivery, traffic and pedestrian management, exclusion zones and how public protection will be maintained during each stage.
  5. Inspect and maintain. Establish responsibility for documented checks, repairs, lighting, housekeeping and response after weather, impact or site changes.
  6. Control removal. Treat dismantling as a planned work stage so the protective function is not lost before the relevant risk has ended.

For a broader explanation of the installation pathway, read the construction hoarding installation guide.

Common planning errors to avoid

Choosing by name alone

“Class A”, “Type A” and “gantry” can be used inconsistently. Base the brief on the required protective function and the terminology of the approving authority.

Assuming one standard detail fits every site

Clearances, support locations, loading, ground conditions, services and street constraints can change the design and approval pathway.

Planning installation but not operation

Inspection, lighting, access control, presentation, maintenance and incident response must remain workable throughout the installation period.

Overlooking the public route

A technically robust structure can still create a poor outcome if pedestrian access, visibility, accessibility or vehicle interfaces are not resolved.

This article supports the service pathway; it does not replace site-specific advice, design or approval.

Frequently asked questions

Is Class A hoarding the same as Type A hoarding?

The terms are often used for the same general ground-level barrier, but official guidance commonly uses “Type A”. Confirm the term and technical requirements used by the council or authority responsible for the site.

What is the difference between Class A hoarding and a gantry?

Class A or Type A hoarding is generally a solid ground-level fence that separates the worksite from the public. A gantry, commonly described as Type B hoarding, adds a designed overhead protective structure for a route beneath or beside the works.

When might a construction site need gantry hoarding?

A gantry may be considered when work occurs above a public footway or roadway, when the public route cannot be removed from the exposure, or when the approving authority requires overhead protection. The need and design must be assessed for the specific site.

Does every hoarding installation require council approval?

Approval requirements depend on the location, land ownership, encroachment and authority rules. Temporary structures on or above public land commonly require approval. Check the relevant council or road authority before installation.

Can scaffolding or site sheds be placed on a gantry?

Only where the structure has been specifically designed and approved for those loads and arrangements. Never assume a gantry deck can support scaffolding, storage or site facilities without documented engineering and authority acceptance.

What information helps SCE review a hoarding enquiry?

Useful starting information includes the site address, scope of work, programme, site and footway dimensions, photographs, public-access constraints, available approvals and any existing design or authority correspondence.

Plan the public interface before work starts

SCE Corp can review the construction scope, access constraints and available documentation to help define a practical hoarding delivery pathway. Final requirements remain subject to site conditions, design, approvals, safety and project suitability.