Sign Posts, Brackets & Bollards: Mounting Your Safety Signs Properly

A sign is only as good as what it is fixed to. Buy the right panel, get the wording right, and then bolt it to a post that leans within a year or a bracket that was never rated for the job, and the sign fails anyway. Posts, brackets and bollards are the part of a signage job that rarely gets planned properly, right up until a sign is crooked, a post is bent, or a forklift has taken a bollard out along with the sign behind it. This guide covers what each of the three actually does, what AS 1742 and AS 1743 say about mounting a sign that faces a road or car park, and how to choose between them.

What posts, brackets and bollards each do

The three get talked about together because they usually turn up on the same job, but they solve different problems.

A sign post is the upright, almost always round galvanised steel, that holds a sign clear of the ground at the height a driver or pedestrian actually reads at. A bracket (or clamp) is the fitting that joins the sign panel to the post, and its job is to hold the panel flat, square and firm in wind without punching through the face of the sign. A bollard is a different animal again. It is not there to hold a sign at all. It is there to stop a vehicle hitting the post, the sign or whatever the post is protecting, and a fixed steel bollard is rated for exactly that impact job in a way a sign post never is.

Get the three confused and the usual failure is a bollard doing a post's job, or a post standing where a bollard should be. A sign post in the path of reversing forklifts is not a protective barrier, however solidly it is set in concrete.

What AS 1742 and AS 1743 say about mounting height and placement

For any sign facing a road, a driveway or a car park, the AS 1742 series is the standard that governs traffic control devices, and AS 1743 covers the graphics, size and layout of the road signs themselves. Between them they set the framework for where a sign goes and how it is positioned so a driver actually sees it in time.

The practical points that matter on most sites: mount the panel so it faces squarely into the driver's or pedestrian's line of sight, set high enough to clear parked cars and passing traffic but not so high it sits above the normal eye line, and keep it clear of anything that could obscure it later, like a growing hedge or a parked delivery van. AS 1742 specifies how road and traffic control devices should be used; it does not hand every site a single universal height figure, because that depends on the road, the speed environment and what else is nearby. Where a job needs an exact mounting height, that is a question for the current edition of the standard or the relevant road authority, not a guess.

Our own posts are designed to meet AS 1742 and AS 1743 for the road-facing and car park signage that relies on them, from the sign panels through to the sign posts, brackets and accessories range that carries them.

Indoors is a different question: sightlines, not a standard

A generic indoor wall-mounted bracket, holding a safety sign above a doorway or on a warehouse column, is not covered by a single Australian Standard the way a road sign is. There is no AS number to quote for "how high should this bracket sit on the wall". What decides it instead is visibility: can the sign be read from the direction people actually approach, is it clear of racking or stacked stock that will hide it within a month, and does it sit at a height that reads easily without craning.

Treat it as a practical WHS-style placement decision, not a compliance box to tick. Walk the path a worker or visitor actually takes, check the sign from that approach, and mount it where the sightline is clean, not just where the wall happens to be free.

Choosing between post types, bracket types and bollards

Round posts are the common choice for a single sign on open ground, a car park or a driveway, and they pair with a simple U-bolt or clamp bracket. A flanged base, like the Flanged Post Holder With Wedge, bolts the post to a concrete pad or slab rather than setting it directly in the ground, which suits a sealed car park or a site where the post might need to come out later.

Wizard sockets are the more common answer where the post is going into soil, and we sell more of them than flanged post holders. A galvanised wizard socket attaches to the base of the post so the post can go straight into the ground without pouring a footing, and it comes in 450mm and 600mm lengths so you can match it to how much support the ground actually gives you. On an unsealed site it is usually the quicker install of the two.

Bollards split into fixed and impact-absorbing types. A fixed steel bollard, such as a T Top Bollard, is set permanently in concrete and does not move on impact, which is what you want guarding a post or a pedestrian path from a reversing vehicle. Where the risk is a low-speed knock, a flexible or reboundable option can absorb a glancing hit instead. Match the bollard to the traffic, not the cheapest option in the range.

This is also where a lot of construction site signage earns its keep: a site entrance sign on a solid post survives a season of vehicle and foot traffic in a way a sign cable-tied to a fence panel never does.

Working out what your site actually needs

• Does the sign face a road, driveway or car park? AS 1742 and AS 1743 govern placement and layout, and the post needs to hold the panel square and clear of parked vehicles and passing traffic.
• Is it indoors, on a wall or a column? There is no single standard for the bracket. Check the sightline from the direction people actually walk.
• Is the post at risk from a vehicle or forklift? Put a fixed bollard between the risk and the post, sized to the traffic, not the budget.
• Is the ground sealed or unsealed? A flanged base plate suits a sealed car park or slab. On soil or open ground, a galvanised wizard socket on the base of the post is the usual answer.
• Will the sign move again? A bolted flanged base makes relocating a sign a five-minute job rather than a re-dig.

A car park is usually where all three questions come together at once, sign, post and traffic risk in the same few square metres, which is worth reading alongside our guide to car park and traffic signs and, where the car park serves customers rather than staff, our guide to private property and customer parking signs . For the hardware itself, the bollards and road work accessories range covers the fixed and portable options side by side.

Disclaimer: The information provided in this article is intended as general guidance only. Sign mounting, placement and bollard obligations differ by hazard, site type and jurisdiction across Australia, and the Australian Standards referenced here are revised from time to time. Always consult the current standard, your WHS regulator and a qualified safety professional to ensure signage is appropriate for your specific site and circumstances.