ISO 7010 · P-series · Prohibition
P001 General prohibition sign
Something is not allowed here, and a supplementary sign or text beside it says what. The empty ring and bar name no action by themselves.
- ISO 7010 reference
- P001
- Registered title
General prohibition sign
ISO Online Browsing Platform, ISO 7010 - P001, General prohibition sign, reference number and registered title- Colour and shape
- Red ring with a diagonal bar, black symbol on white: Prohibition: do not do this here
What the red ring with a diagonal bar means
In HSE’s guidance on the UK Safety Signs and Signals Regulations 1996, a prohibition sign has a round shape
Health and Safety Executive (HSE), L64 Safety signs and signals: The Health and Safety (Safety Signs and Signals) Regulations 1996. Guidance on Regulations (third edition), Part 2, prohibitory signs, intrinsic features (a), page 14 and a black pictogram on white background, red edging and diagonal line (the red part to take up at least 35% of the area of the sign)
Health and Safety Executive (HSE), L64 Safety signs and signals: The Health and Safety (Safety Signs and Signals) Regulations 1996. Guidance on Regulations (third edition), Part 2, prohibitory signs, intrinsic features (b), page 14
Its colour stands for: Prohibition sign
, Dangerous behaviour; stop; shutdown; emergency cut-out devices; evacuate
Health and Safety Executive (HSE), L64 Safety signs and signals: The Health and Safety (Safety Signs and Signals) Regulations 1996. Guidance on Regulations (third edition), Table 1, red, meaning or purpose (page 12)
In the UK: HSE L64
It may sometimes be useful to supplement a safety sign with text to aid understanding. This may be important, for example when introducing a new or unfamiliar sign, or using a general danger or warning sign.
Health and Safety Executive (HSE), L64 Safety signs and signals: The Health and Safety (Safety Signs and Signals) Regulations 1996. Guidance on Regulations (third edition), paragraph 45
In the US: OSHA
No OSHA general-industry rule we read names this sign or its subject. US signs follow OSHA 1910.145 and ANSI Z535; how the US sign classes work.
Signs people confuse with it, or find beside it
Other prohibition signs
Sources
ISO 7010 is a paid standard. Its OBP entries are free to view, but they are a script-driven app, so the title and reference number above are copied from the entry's own heading as it lists them (read 2026-09-29), not from the paid text. Other lines in quotation marks are HSE’s or OSHA’s words.
- Health and Safety Executive (HSE): L64 Safety signs and signals: The Health and Safety (Safety Signs and Signals) Regulations 1996. Guidance on Regulations (third edition) (published 2015). Used here: paragraph 45; Part 2, prohibitory signs, intrinsic features (a), page 14; Part 2, prohibitory signs, intrinsic features (b), page 14; Table 1, red, instruction and information (page 12); Table 1, red, meaning or purpose (page 12). www.hse.gov.uk Checked 2026-09-29.
- ISO Online Browsing Platform: ISO 7010 - P001, General prohibition sign (registered safety sign entry). Used here: reference number and registered title. www.iso.org Checked 2026-09-29.