A8 Warning Sign – Steep Ascent 20%, 70 cm, Class I

A8 Warning Sign – Steep Ascent 20%, 70 cm, Class I

The A8 signals a steep climb, here 20%. Heavy vehicles go up slowly, so drivers behind them should expect a queue, and loaded vehicles pick their gear before the climb.

When class I is used

Class I means RA1 retroreflective sheeting, with 70 cd/(lx·m²) for white and a 7-year service life. It suits places where the sign does not compete with other lights: roads and streets without strong lighting, local, minor and private roads. In areas with many light sources, such as streets with public lighting, shop windows and advertising, SR 1848-2 requires prismatic class 2 or 3 sheeting, because a class I sign gets lost against the background there.

Where it goes, under SR 1848-1:2024

It goes at the start of a climb of at least 7%. The figure is set the same way as on the A7: the actual maximum gradient of the climb, rounded up to a whole number. The 20% sign is used when the rounded maximum is 20%.

Technical data

• equilateral triangle with a 70 cm side (normal format, SR 1848-2), 60 mm red border, white background, black symbol;
• “20%” legend, with 56 mm figures;
• 1 mm galvanised steel sheet, with rounded corners and 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: 2 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 the 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 70 cm triangle is the normal format in SR 1848-2, meant for county and local roads, streets and private roads open to public traffic. National roads call for large 90 cm signs, and motorways for very large 120 cm ones.