C&G PowerPoint Ironmongery

Level 3 Diploma in Site carpentry

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Ironmongery for double doors

Unit 307: Carry out second fixing double doors and mouldings



The choice in design and size of door ironmongery will depend on several factors:

• The type of door.

• Where it is intended to be used.

• The material the door and frame is constructed from.

• The design limitations of the ironmongery.

• The rigors of use.

• Weight of the doors.



The major deciding factors in the correct selection of ironmongery:

• The ironmongery must always:– Allow the doors to deal with the rigors of use.– Ensure the door’s strength is not compromised.– Allow for safe access and egress.

• The ironmongery must never:– Compromise the function of the door to the extent of restricting the intended use of

the door set.



Selecting ironmongery

• There is a considerable selection of ironmongery available to choose from.

• The choice may have already been taken for you when you come to fit double doors.

• Referring to the specification will normally tell you what is to be used and where.

• On smaller type jobs the selection could be down to you or you may be asked for a recommendation for a particular type of door set.

• Understanding the functions, limitations and working functions is a vital part of fitting double door sets.



The four main tasks of ironmongery:

• Carrying the weight of the doors.

• Allowing the door to open and close.

• Locking the door.

• Controlling the door.



Carrying the weight of the doors

The two most common forms:

• Hinges.

• Sliding gear.

Some types of door sets will include a combination of both.



Materials used for ironmongery: ferrous metal

The most common materials used for butt hinges are:

• Mild steel – The cheapest and most commonly used.– Can be further enhanced by adding • chrome plating • electro-brass plating• zinc plating.

• Cast iron – Suitable for heavyweight doors but can be brittle.

• Stainless steel – Resists staining and corrosion and is therefore used for hardwood doors and

external uses.



Materials used for ironmongery: non-ferrous metal

• Brass – Used for ornamental purposes.– Resistant to rusting and staining. – Suitable for both internal and external use.– Good for use with oak.– Brass screws: • are soft and can be easily broken while screwing into hard materials – use extreme

care.• pre-drill holes for brass screws and add a little petroleum jelly to the thread of the

screw to ease the screw into the material and reduce the risk of snapping the screw.

• if fitting slotted screws always finish with the slot running vertical.



Different types of hinges and their uses

• Butt– General purpose hinge. – Suitable for most types of situations and doors.

• Loose pin hinge– Enables easy removal of the door by knocking the pin from the

hinge.– Must not be used on external open out doors for security reasons.

• Ball bearing hinge– Used on heavy doors to ease use and reduce wear and noise.

• Rising butts– Designed as a self closing hinge.– Supplied as left and right hand sets.

(images courtesy of Ironmongery Direct)



Different types of hinges and their uses

• Strap and hook and band– Surface mounted on framed, ledged and braced type

doors.– Larger sets used to carry heavy doors.

• Tee hinge– Similar uses to the strap and hook and band but on

lighter doors and gates.

• Spring hinge– Can be single and double action.– Designed to make the door self closing.




Sliding doors

• The most common form for lightweight doors involves the use of a track and roller system fixed above the top of the door.

• The rollers are fixed to the top of the door allowing it to run smoothly along the track with a guide fixed to the floor.

• Heavy doors use sliding gear fixed to the floor.

(image courtesy of Ironmongery Direct)



Handles and door furniture

• Lever furniture– Available in a very large range of designs and materials.– Can incorporate the key hole. – Used internally and externally. – Can also incorporate the euro lock system making changing the

lock a very simple and quick task.

• Thumb latch – Referred to as the Suffolk latch.– Typically used on gates and framed, ledged and braced doors.

• Hasp and staple– Used on external doors and gates.– Provides a high level of security.




Handles and door furniture

• Escutcheon– Provides a neat finish to the hole cut for the key.

• Flush bolts– Used on the inside edge of double doors, keeping

one door locked while the other is in use.– While both doors are shut the bolt is concealed.

• Cranked tower bolt– Used as extra security on gates and doors cranked

offset allowing bolt to secure into frame work.




Locks

• Rebated mortice locks– Used in double doors that have rebated door stiles and

use lever furniture.– A conversion kit in combination with the standard mortice

lock is used to create the locking mechanism for the doors.

• Cylinder rim latch– Usually used on entrance doors to domestic properties but

have poor security features on their own.

• Mortice dead lock– Usually used as an additional method of securing the door,

typically in combination with the cylinder rim latch.

(images courtesy of Ironmongery Direct and UNION part of ASSA ABLOY

Security Solutions)



Emergency door features

• Intumescent strip– Seals off the door and frame during a fire.– Expands when exposed to heat, sealing

around the door preventing smoke from passing through.

• Panic bolt and latch– Used on double doors that are to be used

as a means of emergency escape, typically fire doors in offices or public areas.

– Keeps the doors secure but allows for easy no key escape.

(images courtesy of Ironmongery Direct and Briton)



Door closers

• Used mainly in industrial buildings, shops and offices to self-close the door.

• Particularly important when fitting fire doors.

• Linked direct into the fire alarm system which releases the door allowing the closure to close the door.

(images courtesy of Ironmongery Direct and Briton)



Door closers

• Concealed spring– The cylinder containing the spring is

morticed into the stile while the anchor plate is fixed to the door frame.

• Pivoted floor spring– Fitted into the floor. – Supports the door and controls its closure.– Mainly used in shops and offices.




Any questions?

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