Drop Lock | Emergency Door Lockdown Device

316 stainless steel main body
High-strength 17-4 PH stainless steel locking arm
Purpose-built for emergency lockdown situations
Mechanical operation without reliance on electricity
Photoluminescent markings for improved visibility
Designed to provide additional security alongside existing door hardware
Retrofit design intended to minimise alterations to suitable existing doors

Description

Drop Lock is a purpose-built mechanical security device developed by Delmark Group to provide an additional physical layer of protection during emergency lockdown situations.

Designed for schools, academies, colleges, workplaces and other shared environments, Drop Lock reinforces an existing doorway through a floor-engaging locking mechanism.

Features

316 stainless steel main body – designed for durability and corrosion resistance.
17-4 PH stainless steel locking arm – engineered for strength and mechanical performance.
Mechanical operation – does not rely on electricity or electronic systems.
Emergency deployment – designed to be engaged quickly from inside the room.
Photoluminescent markings – designed to improve visibility in low-light conditions.
Additional physical security – works alongside existing door hardware rather than replacing the primary door lock.
Retrofit design – developed for installation on suitable existing doors, subject to assessment.

Specifications

Main Body: 316 stainless steel
Locking Arm: High-strength 17-4 PH stainless steel
Finish: Black body with metallic red locking arm
Operation: Manually operated mechanical locking mechanism
Engagement: Rotating locking arm engaging with a dedicated floor plate
Installation: Surface-mounted retrofit design, subject to door suitability
Visibility: Photoluminescent markings for low-light visibility
Power: No electrical supply required for manual operation

How It Works

During an emergency lockdown, the locking arm is engaged from inside the room and connects with a dedicated floor plate, providing an additional mechanical restraint to the door.

Drop Lock is intended to remain disengaged during normal everyday use.

Testing and Compliance

Drop Lock is currently undergoing product development and preparation for independent fire, security and means-of-escape assessments. Suitability for installation will depend on the relevant door assembly, building requirements and applicable approvals.

Suitable Environments

Drop Lock is being developed for environments where rapid emergency lockdown may form part of a wider security strategy.

Schools and classrooms
Colleges and universities
Offices and workplaces
Healthcare and community settings
Public and shared buildings

Drop Lock is a purpose-built mechanical security device developed by Delmark Group to provide an additional physical layer of protection during emergency lockdown situations.

Designed for schools, academies, colleges, workplaces and other shared environments, Drop Lock reinforces an existing doorway through a floor-engaging locking mechanism.

Frequently Asked Questions

Does this replace the main door lock?

No, it is designed to work alongside existing locks as an additional layer of security.

Is it easy to use in an emergency?

Yes, it is designed to be simple, visible, and quick to operate.

Is it suitable for schools?

Yes, schools are a primary use case, along with other public and shared environments.

Does it require power or electronics?

No, it is a fully mechanical system.

Can I request more information about Drop Lock?

Absolutely. If you'd like to learn more about Drop Lock, its features, development progress or potential applications, we'd be happy to hear from you. Whether you're representing a school, academy trust, organisation or simply have a general enquiry, please contact our team at info@delmarkgroup.co.uk.