Unauthorised Entry Is Strictly Prohibited Construction Site Sign gives you one clear entrance sign for construction access control, site danger, visitor reporting and PPE rules. It helps contractors, visitors and delivery drivers understand risks before entering.

Where This Construction Site Entry Sign Should Be Installed

You should install this sign at site gates, hoarding entrances, compound access points, temporary walkways and delivery approaches where people may step into construction work. Clear visibility matters because it gives visitors, trades and drivers instructions before they cross into risk.

Viewing Distance Guidance for Site Entrances

Choose the size by approach distance. Smaller signs suit close pedestrian entry points, while larger formats help drivers and visitors read the message before reaching gates or barriers.

Size option	Best viewing distance	Typical use
H 400 x W 300 mm	Up to 6 metres	Small doors, cabins and close pedestrian access
H 600 x W 450 mm	6–12 metres	Site gates, fencing and visitor entry points
H 800 x W 600 mm	12–20 metres	Main contractor entrances and delivery routes
H 1200 x W 900 mm	20–35 metres	Large hoarding lines, vehicle approaches and wide access areas

How This Sign Changes Behaviour at Site Access Points

Once fitted in the right position, this sign helps stop casual entry, directs visitors towards the site office and reminds authorised people to wear required PPE before they move into active construction work.

✅ Fewer visitors walk straight into restricted work areas without reporting first.

✅ Contractors get a stronger reminder to follow helmet and footwear rules.

✅ Delivery drivers receive clearer instructions before entering moving site traffic areas.

Construction Site Safety Sign Specifications

Sign message: Site Safety
Sign message: Unauthorised entry to this site is strictly prohibited
Sign message: Danger
Sign message: Construction work in progress
Sign message: All Visitors must report to the site office.
Sign message: Permission Must be cleared before entering.
Sign message: Safety signs and procedures must be observed.
Sign message: Personal protective and safety equipment must be used at all times.
Sign message: All persons entering this site must comply with the regulations under the Health and Safety at Work Act 1974.
Sign message: Safety helmets must be worn

Sign message: Protective footwear must be worn
Conforms to EN ISO 7010
Conforms to BS 5499 sign regulations
EN ISO 7010 code: W001
EN ISO 7010 code: P006
EN ISO 7010 code: M001
EN ISO 7010 code: M014
EN ISO 7010 code: M008
Symbol: General warning triangle
Symbol: No access for unauthorised persons

Symbol: General mandatory action
Symbol: Safety helmet must be worn
Symbol: Foot protection must be worn
Materials: Fluted Polypropylene, Rigid Plastic, self-adhesive Vinyl
Size options: H 600 x W 450 mm, H 800 x W 600 mm, H 400 x W 300 mm, H 1200 x W 900 mm
Background colour: Yellow, red and blue
Text colour: Black and white
Finish: Glossy film surface
Orientation: Portrait
Display area: Indoors and outdoors

ⓘ Installation Guidance

Installation Guidance for Site Access Control Signs

Entry-point errors to avoid

❌ Do not fit it behind open gates where the message disappears when the site is busy.

❌ Do not place it too low where parked plant, pallets or barriers can block it.

❌ Do not use only one sign on a long hoarding line with several informal entry points.

Where this sign is not the right choice

❌ Do not rely on it as the only control for open excavations or exposed edges.

❌ Do not use damaged or dirty signs where colour coding and symbols become unclear.

❌ Do not use self-adhesive vinyl on rough fencing where adhesion may fail quickly.

Better fitting decisions on live sites

✅ Mount it at eye level near the decision point before people enter the work area.

✅ Use fluted polypropylene with cable ties for temporary fencing and moving site layouts.

✅ Use larger sizes where vehicles, pedestrians and deliveries approach from different directions.

? Customers Questions

Unauthorised Entry Is Strictly Prohibited Construction Site Sign questions answered

What is this construction site safety sign used for? It helps you control site entry, warn of construction work in progress and tell visitors which PPE rules apply before they enter.

Is this sign suitable for a main site entrance? Yes, especially on gates, hoarding, temporary fencing and compound entrances where people need access rules before crossing the boundary.

Which size should I choose for a construction gate? Use H 600 x W 450 mm for normal pedestrian gates. Choose H 800 x W 600 mm or H 1200 x W 900 mm for wider vehicle approaches.

Does this replace separate helmet and footwear signs? It can reduce clutter at entry points because the helmet and footwear messages are included, but you may still need separate signs inside high-risk work areas.

Is it right for every restricted entrance? It is best for construction environments. For warehouses, offices or private land without construction activity, choose a simpler access-control sign instead.

✔ Features & Benefits

Unauthorised Entry Construction Site Sign Features and Benefits

Features

✓ Combines access restriction, danger warning and PPE instructions in one sign
✓ Uses prohibition, warning and mandatory symbols for fast recognition
✓ Available in four practical sizes for small gates or large site frontages
✓ Material choices support fence, wall, door, post and temporary site fitting

Benefits

✓ Helps you reduce unauthorised entry before people reach live work activity
✓ Gives visitors clear reporting instructions instead of leaving access rules unclear
✓ Reinforces helmet and footwear requirements at the point they matter most
✓ Saves space by replacing several separate entrance signs with one clear layout

Stronger access-control options for construction entrances

For a danger-led access message, use danger no unauthorised access signs where entry could expose people to site risks. Suitable for perimeter fencing, gates and controlled work areas.

Where trespass is the main concern, compare with warning keep out construction signs for boundary lines and temporary access points. They give a clear instruction without making the layout too heavy.

For a stronger keep-out instruction, add danger keep out construction site signs where the site carries serious hazards. This helps make the perimeter message harder to miss.

If the access issue is part of a wider building site warning, use dangerous building site warning signs near entrances and visitor approaches. They explain why access needs to be controlled.

For more entry and hazard-control choices, view site safety signs for restricted access and select the warning strength that suits your site. This helps keep your perimeter messaging consistent.

🚚 Delivery

Estimated Delivery Day

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Estimated delivery by:

Based on an estimated 3 working day delivery timeframe from today, excluding weekends and bank holidays. Delivery dates are provided as a guide only and may vary depending on the product ordered, stock availability at the time of purchase, production or printing lead times.

Unauthorised Entry Is Strictly Prohibited Site Safety Signs