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PROLINEArchitectural Ironmongers

About twenty numbers

That is what an accessible opening comes down to. Settle them in the schedule and nobody argues about a handle on site.

Can you handle Part M?

Yes. Approved Document M and BS 8300-2 are applied door by door as we write the schedule, not checked on site after the doors are hung. It comes down to about twenty numbers.

Every dimension, in full

The round bar lever was never mandatory.

The designs drawn in the guidance are indicative only. Reeded, knurled, bronze and matt black all pass. A building need not look like a hospital.

A fluted lever handle on a reeded round rose, in polished nickel
A hexagonal knob on a square rose

Knobs are the exception

Furniture has to work one-handed. A knob does not, so it stays off the accessible openings and goes on the cupboards and the private doors instead.

800mmClear width, straight-on approach
30NMaximum opening force at the leading edge
15LRV points of contrast, furniture against door

What if the fire strategy disagrees?

It often does. The same door has to open easily and shut itself firmly against a latch, seals and air pressure. Swing-free closers and powered operators resolve it, opening by opening, on paper.

Fire and escape doors
Large brushed metal door numerals fixed to a dark green corridor wall above two doorways
Numerals sized and contrasted to be read from the corridor, not from arm’s length.

Who decides the contrast?

You do, when you choose the finish. Contrast is a finish decision, which makes it a scheduling decision. A handsome lever can fail on it, and that is settled on paper months before site.

The finish guide

We mark the openings that fail before anyone builds them.

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