FUHR 856 Type 3 Door Lock

FUHR 856 Type 3 Door Lock

  • 25, 30, 35, 45mm back sets available
  • 92mm PZ centre
  • Reversible latch and deadbolt
  • 2 hooks, 2 rollers, latch & deadbolt
  • Variable handle height - supplied at 1020mm
  • FUHR silver corrosion resistant surface finish
  • Profile related locking plates
  • Lever operated door lock

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Description
Questions & Answers

FUHR MultiSafe multi-point door locks are renowned for their ease of use, reliability and durability. Profile specific keeps ensure secure fastening to the outer frame.

Lever/Lever action is a very simple means of operating a door lock – when the door is unlocked by the cylinder, depress the lever to release all locking points. On closing, lift the lever to engage the main locking points then turn the key in the profile cylinder to throw the central deadbolt and to deadlock all other locking points.

Where security is a greater concern on main residential doors, the Secured by Design accredited FUHR 856 Type 3, with 2 hook bolts and two roller cams is recommended. The hooks engage in pressed steel locking keeps – profile related to fit the profile securely, without packers. The Type 3 door lock has also achieved a half hour fire rating on a tested door set.

Throw:

  • 14mm or 20mm deadbolt throw
  • 20mm hook bolt throw
  • 9mm roller cam travel
What is a Eurogroove?

A Eurogroove is an industry standard feature on most PVCu, aluminium and timber door and window profiles, where the locking devices are fitted.

A Eurogroove is the groove in the profile in which multipoint locks and espagnolettes are fitted. This is always 16mm for PVC, but can be 20mm in Timber.

 

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How do I measure the PZ centre and Backset on a door lock?

Backset

The backset is the dimension from the front of the faceplate to the centre of the handle spindle or cylinder hole.

The most popular backset sizes are 25mm, 30mm, 35mm and 45mm.

The backset dimension is the distance between A and B on the diagram.

 

PZ Centre

The "PZ" or "Centre" is the distance between the centre of the handle spindle and the centre of the round section of the cylinder. 

The PZ Centre dimension is the dimension between C and D on the diagram.

Multipoint locks can have one or two spindle holes (also known as followers) these type of locks will have two measurements, the most popular being 62mm / 92mm.

Most modern locks with one spindle are 92mm centre, however some older locks may be 70mm or 72mm.

 

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How do I change the handing of a FUHR door bolt?

On most FUHR locks, to change the handing you remove the small grub screw on the side of the lock case adjacent to the latch plate with a 2mm allen key.

Remove the latch and turn in it 180º vertically, place it back into the opening and secure the grub screw back in place.

The FUHR 871 and FUHR 881 door locks are supplied handed, this cannot be changed, so please ensure you order the correct handing for the application.

How do I adjust FUHR keeps/strikers?

Hook and keep alignment:

The hook keep should be aligned using the guideline on the hook plate. Ensure the hook engages correctly avoiding friction on which can result in damage to the hook, there should be a 2mm gap between the line on the hook plate and the flat of the hook as shown in the diagram.

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Latch and hook adjustment:

Take care not to over adjust the hook keep as this can damage the keep - do not rotate through 360º.
A screwdriver and a 4mm allen key will be required when adjusting these plates.

 

Roller and mushroom adjustment:

Adjust eccentric compression of roller and mushroom keeps to ensure the optimum compression for the door.
Adjust the compression using a 4mm allen key.

 

How do I replace a FUHR Lockcase?

Step 1 Unscrew and remove the 3 screws as shown in the video

Step 2 Remove the lockcase

Step 3 Clip the replacement lockcase in place

Step 4 Replace the 3 screws

 

What is PAS 24?

PAS 24 is an enhanced security performance test for door assembly requirements,  every component used within the door set tested must comply to the relevant British Standard for that component.

PAS 24 includes several security tests, such as:

  • Manual intervention
  • Mechanical loading
  • Hard and soft body impact

An example of the intensity of the testing, the mechanical loading tests subjects the door set to 4.5Kn of pressure, the equivalent of approximately 45 times the pressure used to tighten a car wheel nut.

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