Posts Tagged ‘Door Repairs’

Fire Door

One of the main issues with fire doors is identifying what a door is when the only information you have available is the door itself, no records and no compliance tag. This problem exists for the manufacturer trying to counter a warranty claim, a service company wanting to undertake repairs, a building/facility owner needing to provide certification to an authority etc.

In relation to passive fire protection, such as fire doors, data is king. Knowing what a door is provides the essential information needed to certify and properly service and maintain the fire door throughout its life.

Radio Frequency Identification (RFID) technology is a very flexible technology which in essence provides a truly unique identification to an individual item. Having a means to uniquely identify items then allows us the power to then follow this item throughout its usable life and beyond.

This means that not only can we follow an item but we can also maintain an accurate audit trail of the item and all things which have occurred to it during its life. These things could be original manufacturing details, warranty conditions, approvals, service visits, photos of modifications etc.

Through the utilization of a central data store we can associate any amount of information against the unique identification of an item and not only associate any amount of data against it but also recall the information as and when required.

The ability to combine RFID technology with central data stores is further expanded with the use of an internet based portal providing access to the central data store. This ability then gives rise to information being readily available around the world regardless of location through a standard internet browser or via a portable mobile device.

Examples of what we can achieve with RFID

The following are examples of the application of RFID technology for the fire door industry. This is only a short list of the possibilities of this technology for not only the fire door industry but any industry.

Proof of product
  • Identify an item with a RFID Tag containing a unique identifier
  • Through an internet portal upload documentation relating to each product type
  • Through a portable hand held device, scan the RFID Tag and enter the manufacturing details of the product
    • E.g. Type, size, colour, shape etc
  • Write data directly to the products RFID tag
  • At any time, scan the product RFID tag and retrieve the data relating to the product as referenced against the unique identifier
  • Allow authorities access to read data directly contained on the product RFID tag e.g. manufacturer, compliance details etc
Product Certification
  • Prior to installation scan the product RFID tag and obtain the details of the product and ensure they are correct for the intended installation
  • As details are held in the data store automate the generation of certificates and schedules relating to product evidence and compliance
Proof of Attendance
  • Using portable devices to record the undertaking of inspection activities, the inspection can be designed to only occur if a successful scan of the product RFID tag is undertaken which by default requires the technician to be in close proximity of the products RFID tag
  • If a product RFID tag is not scanned the system can allow the technician to proceed with the inspection but will send a status back to the central data store detailing that the product was not scanned to initiate the inspection activity
Remote data capture and data transfer
  • Individual product maintenance requirements can be provided for each individual product or type of product and held in the central data store
  • By scanning a products RFID tag the device software can communicate with the central data store and display the maintenance requirements for the specific product scanned
Monitoring activities
  • Establish routine inspection dates for a product and have the central data store advise when things should be done or when things are not done when due
  • Get alerts when warranties are due to expire so you an pro actively contact the client and see if they want ongoing service post warranty
Automated reporting and notifications
  • Let the central data store crunch the data so you don’t have to
  • Generate inspection reports based on data captured in the field
  • Generate door schedules based on data held in the data store
  • Automatically generate a report every time an event happens e.g. on warranty expiry send an automated email to the client advising them the warranty period is over and for any future issues contact company x, y or z

Is RFID an answer for the fire door industry? I believe it is.

RFID technology is a way we can finally and comprehensively address identification issues in relation to fire doors and further provide added benefits to all stake holders who are involved with the manufacture, supply, installation, services and certification of fire doors by providing a comprehensive product history from manufacture to disposal.

Through the use of RFID technology we can build further integrity into the industry and protect the safety of people in buildings and facilities and also minimise the risk of premature product replacement.

 


If you found this article useful or otherwise please provide comments or suggestions so I can improve on future posts.

Advertisements

1. What are edge strips?

Edge strips are basically strips of timber which frame the outside of the fire door.

Edge strips are predominantly pine or finger jointed timber and should be free of bowing, twists, knot holes and other irregularities all of which should be checked prior to assembly of the fire door, or prior to installation of the fire door.

2. Why are they used?

Edge strips are used predominantly for the following reasons;

  • For the prevention of moisture entering the core of the door and
  • To allow for site trimming to achieve the stipulated clearances between the door and the frame.

3. What happens to an edge strip if the door is subjected to fire conditions?

As the edge strip is timber, under fire conditions the edge strip will burn.

Although this seems drastic don’t worry. The door will not fall out of the frame as the hinges are fixed into perforated steel plates within the fire door.

You will note that the stop section of a fire rated frame (i.e. the section of frame the door closes on and prevents the door from being swung right through the opening) is bigger than a standard stop section (i.e. 25mm for fire rated frames and 12mm to 15mm for non rated frames). An edge strip is nominally 10mm thick so if it burns away, the core inside the fire door will still overlap the frame and provide a barrier to the spread of a fire for a certain amount of time.

4. Where do edge strips commonly split?

From inspecting thousands of doors over the years, the most predominant area where I have found splitting of the edge strip is above and below the lockset latch (both mortice and cylindrical) and to a lesser extent above and below the hinges.

If you are cutting timber for a fire using an axe, you often find that you start with a little crack in the piece of timber and then with continual force, the crack grows bigger and then follows further along the grain of the timber.

This is true also for timber edge strips. When the lock and hinges are installed, they are usually rebated (referred to as “checking in”) the timber edge strip so that once installed they finish flush in line with the edge strip giving a neat aesthetically pleasing finish.

In doing this, often very small cracks can begin on the corners of the rebated section and over time with the door opening and closing the cracks gradually grow bigger and bigger until a split in the edge strip becomes visible.

Regular maintenance of fire doors can go along way to maximise the life of the fire door by ensuring the door does not slam into the frame.

Like hitting a piece of timber with an axe, slamming of a door can cause the same effect. Even though there is no axe (unless of corse the fire brigade come to visit and you forget to give them a key), the door can be subjected to a similar force which over time allows the crack to develop further until it meets the grain of the timber and off it goes.

To minimise the spread of splits in a timber edge strip make sure the adjustment of the closer is correct so that the door does not to slam into its latching position.

5. What effect does a split edge strip have on the ability of a fire door to perform under fire conditions?

As discussed in Point 3, in a fire the edge strip is most likely burnt so in a simple response we can deduce that a split in the edge strip would have little effect on the doors ability to perform under fire conditions because it is one of the first things to be turned into ash.

Having said this however, we need to be mindful of why edge strips are used.

As discussed in Point 2, one of the main reasons for having an edge strip is to prevent moisture from getting into the core of the door.

If a split in the edge strip is large enough to allow moisture into the core of the door, it requires immediate attention.

Please note that any repair to a fire door must be done in accordance with the requirements of the relevant codes and standards and as such it would be highly recommended to speak to your fire door provider prior to undertaking any repairs to your fire doors to ensure that the proposed method of repair will not effect the integrity of the fire door and further that the repair method is approved.

The internal damage to the door core from moisture can affect the doors ability to perform under fire conditions as hollow pockets can form inside the door where the door core deteriorates and/or collapses.

As the outer covering of the door, like the edge strips, is generally timber (ply, MDF, Duracote etc), when it burns, hollow pockets within the door can be exposed allowing a fire to spread through the door. This obviously defeats the purpose of having the fire door there in the first place.

6. Summary

If you do have fire doors showing the early signs of splitting along the edge strips, get onto it early, don’t ignore it.

You will normally find that with preventative maintenance and regular inspection of the doors you can minimise the spread of splitting and maximise the life of your fire doors.

Edge strips are an integral component of a fire door and although they have little function if there is a fire, they are very important in maintaining the integrity of the door by creating the barrier between the internal core of the door and the moisture in the air so that if a fire does occur, the door can perform as it was designed to.

If you are advised by your service provider that your fire door requires replacement due to splits occurring on the edge strips, it may not be as bad as it seems.

We would suggest that prior to replacing any fire doors you speak with the manufacturer (the company or person who constructed the door) or sponsor (the person or company who manufactured the core of the door) of the particular fire door you have installed (the name of the manufacture and sponsor should be found on the compliance tag installed on the hinge side edge strip of the fire door) and check with them to ascertain if a repair method is available.


If you found this article useful or otherwise please provide comments or suggestions so I can improve on future posts.