What is meant by Open In Bifold Doors or windows? This is a term used to describe pairs of opening panels that move, fold and open towards the inside of the building.
What are Open Out Bifold Doors or Windows? This is a term used to describe pairs of opening panels that move, fold and open towards the outside of the building.
What are the Head and Sill? These describe the top and bottom horizontal frame members which incorporate the gear, track and guide rail for sliding doors and bi fold doors.
What is a Jamb? These are the vertical frame members
What is the Bifold End Track cap? This is the plastic cover attached to each end of the bi-fold track and guide rail
What are the Top and Bottom Rails? These are the horizontal top and bottom panel members
What is a Vision Rail? This is the name given to the horizontal panel member separating two or more panes of glass
What is the Door Hinge? This is the hinge used to hang an aluminium door panel in a frame
What is a Bifold Hinge? This is the hinge used to attach two or more bifolding door panels together
What is the Bifold Roller Assembly? This refers to a wheel assembly used to aid the movement of folding sets of panels in one direction along a track.
What is the Bifold Hinge Roller Assembly? This is a wheel assembly used to aid the movement of unequal combinations of folding panels in one direction along a track, where the roller also acts as a hinge on typically 3 or 5-panel combinations.
What is a Lever Lock? This is a device used for locking and opening or closing an aluminium door panel
What is a Compression Lock? This is a door lock, whereby the upward action of the handle engages or disengages locking bolts into the top and bottom of the frame
What is a Flush Bolt? This is a device used to secure pairs of panels from opening in a frame, (can be either recessed or surface mounted)
What is a Gusset? A Gusset is a component made from flat aluminium sheet or plate used to strengthen corner joints of sashes and frames
What is a Travel Packer? This component is used to protect the bottom panel rail from damaging the frame sill during transit
Which is the Main Handle? It is the lead door that will normally have the main multi point locking and lift up handles fitted. This is referred to as the Main Handle whereby the handles are lifted to engage the rods and hooks of the multi point locking system.
What is the track? This is the aluminium profile at the top and bottom of the bifolds that will either take the weight of the gearing on bottom hung doors with guides at the top or in reverse where the doors are hung from the top and guided at the bottom.
What is the threshold? There are generally two types of bifolding door thresholds available, standard step over threshold and the lower type. Often you will find that only the standard step over has any degree of weather resistance with the low threshold being used for doors fitted internally as room dividers for example.
Feel free to get in touch with one of our helpful team if our glossary and terminology page doesn’t include your description/phrase.