1-Piece
The World’s Toughest Marker Post
Quick Install for Unsealed Surfaces
Steel-Flex® is the most durable roadside marker post available. It is roll formed from a special grade of high-performance spring steel, then protected by an ArmorGalv® thermal diffusion galvanised coating. Each post is then powder coated to provide a high gloss, UV resistant colour finish ensures long-lasting durability, and ongoing delineation for assets on unsealed roads in demanding Australian conditions.
Steel-Flex is available in a wide range of colours and can be fitted with any delineation you require. Its unique design and manufacturing process gives Steel-Flex exceptionally high corrosion resistance, even after being impacted.
When you need reliable, long-lasting roadside delineation for unsealed roads and demanding Australian environments, the Steel-Flex 1 piece flexible marker post is the industry’s top choice. Proudly engineered and manufactured in Australia, Steel-Flex sets the standard for marker posts, combining impact resistance, durability, and quick installation.
Steel-Flex 1 Piece Features & Benefits
Unmatched Durability
Roll-formed from high-performance spring steel, Steel-Flex® flexible steel marker posts are protected by an advanced ArmorGalv® thermal diffusion galvanised coating, then finished with a UV-resistant, high-gloss powder coat. This triple-layer protection delivers exceptional corrosion resistance, even after repeated impacts or harsh weather exposure.
Self-Righting Flexibility
The patented flexible steel design means Steel-Flex® posts bend and return upright after impacts or wheel-overs, dramatically reducing replacement and maintenance costs.
Fast, Safe Installation
1 Piece construction allows for rapid installation directly into unsealed ground or road base using manual or mechanical drivers. Dual retention barbs ensure stability and prevent unauthorised removal.
Long-Term Performance
Retains at least 75% of its colour and physical properties for 10+ years, even in extreme weather. Fire-resistant up to 140°C, non-flammable, and safe to handle with no sharp edges.
Versatile & Customisable
Available in a wide range of colours and compatible with all standard delineators and marker post stickers, ensuring compliance and visibility for any project.
Australian Standards Compliance
Fully compliant with British & European Standard EN 12899–3:2008 and Australian Standard AS 1742.2 and AS/NZ 1906.1.
Steel-Flex® 1 Piece Marker Post
Steel-Flex® 1 Piece Marker Posts are purpose-built for:
Unsealed Roads & Rural Routes
With their ability to withstand repeated impacts and harsh conditions, these posts are ideal for ensuring consistent asset marker gravel roads, regional highways, and outback tracks where vehicle wheel-overs and environmental extremes are common.
Road Edges & Shoulders
Perfect for marking the edges of unsealed or partially sealed roads, especially in areas with limited visibility or high traffic.
Temporary & Permanent Installations
Their lightweight, one-piece design makes them equally suitable for rapid deployment in roadworks and as a permanent solution for rural infrastructure.
STEEL-FLEX® MARKER POST TECHNICAL SPECIFICATIONS
Delnorth Steel-Flex ® is a patented flexible steel delineator post. Steel-Flex ® may be driven into the ground or road base using a Delnorth designed manual or mechanical driving device. Steel-Flex ® is capable of withstanding repeated impacts and wheel overs by vehicles with minimal damage to the post or vehicle. Steel-Flex ® marker posts comply with:
British & European Standard E N 12899 – 3:2008 & Australian Standard AS 1742.2 and AS/NZ 1906.1
Steel-Flex ® can retain a minimum of 75% of colour, appearance and physical properties for 10 years even when exposed to extreme weather conditions. They are fire resistant and the powder coating can withstand temperatures of up to 140°C.
Steel-Flex ® flexible steel marker posts stand vertical when installed. Testing has shown that the post will not deflect more than 35mm when subjected to wind speeds of 45m / sec. (162 kph) on the front face (convex surface) of the post.
The load required to bend each post length of 1000mm long to an angle of 90° should not be less than 30N. It only requires 5kg pressure to bend a Steel-Flex ® post.
Steel-Flex ® marker posts return to vertical automatically after repeated vehicle impacts. They have been tested to 10 impacts from a passenger type vehicle at 100 kph without compromising the integrity of the post. It has been tested to ten wheel over’s at 50kph from a fully laden 42 tonne truck without compromising the integrity of the post.
Steel-Flex ® has been tested to comply with the following standards:
Impact Resistance (ASTM D – 2794) Adhesion (ISO 2815) 2000 hr Salt Spray (ASTM B – 117)
All faces of the Steel-Flex ® marker posts are a smooth gloss white powder coat finish to a minimum thickness of 70 microns over a ArmorGalv ® thermal diffusion anti-corrosive protective coating.
Finish and Colour standard colours:
- White
- Blue
- Red
- Yellow
- Orange
- Green
- Lilac
- Custom coloured can be manufactured MOQ apply.
Steel-Flex ® is non-flammable
The manufacturer’s name and the month/year date of manufacture with minimum 1 cm high characters, are applied to the concave surface of the post. The recommended installation depth is marked by a 12mm diameter hole punched into the post 40cm from the lower pointed edge. Reflective sheeting is applied to conform with the relevant specifications.
One piece Steel-Flex ® delineator posts are driven into the ground or road base to a minimum depth of 400mm. Dual retention barbs assist to provide post stability, correct alignment and resistance to unlawful removal by hand. Testing has shown that when installed correctly in average ground conditions, there is a force of over 500kg required to remove the post from the ground.
To maximise the life of the post, it is recommended that a small V shape divot approximately 100mm deep x 100mm long x 105 mm wide, be removed to provide a bend radius when there is a direct wheel-over by a vehicle. This void may be filled with sand if required. Installation instruction sheets are included.
Steel-Flex ® posts can be fitted with all available types of Guide Post delineators and Marker Post stickers complying with AS 1906.1. The posts can be driven in with delineators or stickers attached.
Steel-Flex ® posts have been test conditioned for 2 hours at temperature extremes of -10°C and +60°C.
Result of Steel-Flex ® Heat Resistant Test = Pass (1 second each bend)
Result of Steel-Flex ® Cold Resistant Test = Pass (1 second each bend)
The Steel-Flex ® post has been conditioned for 2 hours at -10°C and no signs of splitting or fracturing when a steel ball at 1kg was dropped from a height of 1500mm.
Result of Steel-Flex ® Steel Ball Test = Pass (1 second each bend)
FEATURES
- Manufactured in Australia from high performance steel.
- ArmorGalv ® thermal diffusion coated for corrosion resistance
- High gloss, fire resistant powder coated finish
- Wide range of colours.
- Fast, safe and easy to install using selected petrol powered, pneumatic or manual drivers.
- Guaranteed for up to 10 years
- Light weight and easy to store – minimal area required.
- Safe to handle – no sharp edges.
DOWNLOADS
INSTALLATION EQUIPMENT FOR 1 PIECE Marker Posts
STEEL-FLEX ® ( 1 PIECE) GUIDE POSTS & ROAD EDGE POST PRODUCTS
This is just an example of product SKU
STEEL-FLEX® MARKER POST GALLERY
