Pulse carriageway 1 & 4 locking and and unlocking instructions

This method statement provides step-by-step instructions for the safe opening, closing, and basic maintenance of the security variant of Pulse Carriageway 1 and 4 frames and covers.

It is intended to support product handover, ongoing operational use, and ensure compliance with site standards.

All operations described in this document must be carried out in strict accordance with:

• HSE working procedures for the lifting, removal, and refitting of covers into frames.
• Site-specific Health & Safety procedures, including (but not limited to):
  • Manual handling regulations.
  • Use of correct PPE (Personal Protective Equipment).
  • Traffic and pedestrian management where required.
  • Safe working in and around highways and carriageways.

All lifting of covers must follow HSE guidance on safe working loads and approved lifting techniques.

Locate the padlock housing sub-covers.

Each triangular cover has one padlock housing, as shown circled in the image.

Using a 17mm socket, remove the 2x ISO 4016 - M10 x 25 bolts securing each padlock housing sub-cover.

Hinge open the Sub cover to allow access to the padlock housing in the main cover below.

Use the Pulse / BT padlock key to unlock and remove the padlock body completely. The padlock shackle will remain in place in the housing.

Once both padlocks have been removed from a pair of covers, the covers can be lifted out following HSE standard cover handling process.

Remove the padlock shackle from the frame-mounted hinged lock arm and place somewhere safe.

With the padlock shackle removed, hinge the frame-mounted lock arm fully closed.

This ensures the clear opening is completely unobstructed and ready for safe operator access.

Rotate the frame-mounted hinged lock arm 90 degrees into its fixed open position. This ensures the arm is in the correct position and ready to receive the padlock shackle and covers during refitting.

Place the padlock shackle into the rubber cradle on the frame-mounted hinged lock arm.

Ensure the padlock shackle is positioned vertically within the cradle to allow proper alignment with the cover during refitting.

Lift and lower the coupled pairs of triangular covers carefully back into the frame, following HSE standard cover fitting process.

Important
​​​​​​​As you lower the covers, ensure that the locking shackle located in the frame passes through the hole in the underside of each cover correctly.

This is essential to allow the covers to be securely locked.

Also, ensure the covers are replaced in the same orientation as they were removed.

Insert the padlock body onto the exposed shackle and lock it securely using the Pulse / BT padlock key.

Confirm the padlock is fully engaged and locked.

Hinge the padlock housing sub-covers back into their closed position.

Secure each sub-cover down using 2x ISO 4016 - M10 x 25 bolts previously removed. Tighten using a 17mm socket.

The locking system is designed to be low maintenance.

Routine Actions:

• No regular maintenance is required for the locking system components under normal operating conditions.
• During site visits or inspections, it is recommended to check for and remove any debris, silt, or buildup around the locking shackles and padlock areas.
• Keeping the locking points clear will ensure smooth operation and prevent obstruction when locking or unlocking the covers.