Armco barrier installation on a private site (industrial estate or car park) typically takes 1–2 days for a standard 50–100 metre run. On a public highway with traffic management, a 100m run requires 1–3 days depending on post-driving conditions, lane closure requirements and team size. Replacement of existing Armco (post-impact repair) is typically faster: 2–4 hours per section.
How Long Does Armco Barrier Installation Take? — Complete Guide
One of the most common questions we receive from clients planning Armco barrier projects is: how long will it take? The answer depends on a number of variables — the length of the run, the type of installation, ground conditions, whether the work is on a public highway or private land, and whether existing Armco is being replaced or a new installation is being made from scratch.
Factors Affecting Armco Installation Speed
1. Site Type — Private Land vs Public Highway
Installation on private land (industrial estates, warehouse yards, car parks, private roads) is significantly faster than on public highways. On private land, there is no requirement for a Streetworks permit, traffic management team, or Chapter 8 signing scheme. A crew can work continuously throughout the day with unrestricted access to the site. On a public highway, the additional requirements of permit application (which may take 2–4 weeks to obtain from the highway authority), setting up a full Chapter 8 traffic management scheme, working within prescribed lane closure windows (which may be time-restricted in busy urban areas), and complying with NRSWA or National Highways Licence requirements all add substantial time and complexity.
2. Post Installation Method
The method used to install Armco posts is the most significant variable in installation speed:
- Driven posts — steel posts are driven directly into the ground using a post driver (either hydraulic or pneumatic). This is the fastest method, capable of driving a post to the correct depth in 2–5 minutes per post in suitable ground conditions (soft to medium compacted soils).
- Bored and concreted posts — where driven posts are not suitable (hard ground, rock, or near utilities), posts may be bored with an auger or drilled with a core drill, then set in concrete. The concrete must cure before the Armco beam can be installed — typically 24–48 hours for standard concrete, though fast-cure compounds can reduce this to 2–4 hours.
- Surface-mounted posts — for indoor car parks or areas where ground penetration is not possible, surface-mounted post bases are bolted to the existing concrete or asphalt surface. This is extremely fast but provides significantly lower impact resistance than in-ground posts and is only suitable for low-speed environments.
3. Run Length
A standard N2 class Armco installation uses posts at 2.66m centres (two 4.32m Armco beams share a common post with 1.33m overhang at each end). A 100-metre run of Armco therefore requires approximately 37 posts and 25 beam sections. With driven posts in suitable ground, an experienced two-person team can typically install around 50–80 metres of Armco per day on private land, including beam installation, bolting, end terminals and final inspection.
4. Ground Conditions
Hard or variable ground significantly slows post installation. Encountering rock, hardcore layers, tree roots or existing underground services may require alternative post installation methods, specialist equipment or re-routing of the Armco line — all of which add time. A pre-installation ground investigation (even a simple trial hole) can help identify potential issues before the installation crew arrives on site.
Typical Armco Installation Timescales
| Scenario | Estimated Duration |
|---|---|
| 20m run, private land, driven posts, good ground | Half day (4 hours) |
| 50m run, private land, driven posts, good ground | 1 day |
| 100m run, private land, driven posts, good ground | 1.5–2 days |
| 50m run, private land, bored and concreted posts | 2–3 days (including concrete cure) |
| 100m run, public highway, lane closure, driven posts | 2–4 days including permit application |
| Emergency post-impact replacement (10m section) | 2–4 hours |
| Car park Armco (50m surface-mounted) | 1 day |
Planning Your Armco Installation
For the smoothest and fastest installation, we recommend:
- Site survey — have a specialist survey the site before ordering to confirm ground conditions, post spacing and end terminal requirements
- Utilities clearance — check for underground services before driving posts. Contact Linesearch Before U Dig (LSBUD) for utility drawings
- Permit lead time — for highway works, allow 4–6 weeks for permit application and approval
- Materials on-site — confirm materials are on-site (or confirmed for delivery on Day 1) before the installation crew arrives
- Access confirmation — ensure the crew can access all parts of the installation route with their vehicle and equipment
Armco Installation from Barriers Co
Barriers Co offers supply-only and supply-and-install services for Armco barriers. Our installation teams are experienced in private land, industrial, car park and public highway Armco installations across the UK. Contact us for a site survey and quotation — we will provide a realistic installation timeline for your specific project.