C18 Prohibition Sign – No Vehicles over 25 t, Ø60 cm, Class I

C18 Prohibition Sign – No Vehicles over 25 t, Ø60 cm, Class I

The C18 protects bridges and roads that cannot carry heavy vehicles: vehicles with a maximum authorised mass above 25 t may not enter. The value is shown in large black figures.

When class I is used

The sign has class I (RA1) retroreflective sheeting: 70 cd/(lx·m²) for white and a 7-year service life. It is the economical choice for places without many light sources, such as local, minor and private roads or streets without strong lighting. Where there is street lighting, shop windows or advertising, SR 1848-2 requires prismatic class 2 or 3 sheeting, which stands out better against a lit background.

Where it goes, under SR 1848-1:2024

It goes at the start of the section, or at both ends of bridges, underpasses, tunnels and other places where vehicles with a maximum authorised mass above the value shown are banned, and at the junction from which the restriction can be avoided. If the restriction covers only one vehicle category, an additional panel shows it.

The general rule in SR 1848-1:2024: the sign goes right after the junction before the restricted section, so the drivers concerned can find a way round without turning back, and it is repeated after every junction on the section. Mounted over a lane, it applies to that lane only; when the restriction starts some distance on, the P4 panel shows the distance.

Technical data

• 60 cm diameter disc (normal format, SR 1848-2): white with a red border and the value 25 t in black;
• 1 mm galvanised steel sheet, with pressed edges, no sharp edges;
• electrostatically painted with UV-resistant paint;
• class I retroreflective sheeting (RA1), resistant to UV and weathering, with a 7-year service life;
• weight: 3 kg;
• fixings included: 2 clamps for Ø48 mm posts and 4 bolts with nuts;
• CE marked; compliant with SR EN 12899-1:2007, SR 1848-1:2024, SR 1848-2:2011 and SR 1848-3:2011.

Mounting and size

Fixings for the post are included: 2 clamps for Ø48 mm posts and 4 bolts with nuts; clamps for Ø60 mm posts are available on request. The bottom edge of the sign goes 1.50–2.50 m above the road or kerb, and the edge nearest the road 0.50–2.0 m from the road platform. The sign must be visible from at least 50 m in built-up areas and 100 m outside them.

The post is ordered separately. For a fixed installation in a concrete foundation: the galvanised Ø48 mm post, 300 cm. For temporary use, with no foundation: the Ø48 mm tripod post, 120 cm. On concrete or paving, where you cannot dig: the Ø60 mm flange post, 300 cm, bolted down; for it, ask for the Ø60 mm clamps when you order.

The 60 cm diameter is the normal format in SR 1848-2, for county and local roads, streets and private roads open to public traffic. National roads call for the large Ø80 cm format and motorways for the very large Ø100 cm one; the standard forbids using a smaller format than the road category requires.