Bifold Rolfe Ltd - Folding leaf Doors

Specifications :- Folding Leaf Doors.

Single Doors :-
The single doors illustrated are bunched to the left as viewed from inside. The reverse details would apply if they were required to bunch on the right.

BI-parting Doors :-
Normally arranged to bunch equally on both sides, however, unequal bunching and opening coverage may be provided in special circumstances.

Free Moving Sections :-
An additional section arranged for locking at both ends and which can bunch in any position, may be provided for some manual installations. Advice will be given on this feature when a customer's particular requirement is known.

Installation Arrangements :-
1. Hung behind lintel and bunching behind the jambs of the structural opening.
2. Hung beneath lintel and bunching within structural opening.
3. Hung behind lintel and bunching within structural opening.
Dependent upon opening construction, provision may be made for a combination of the three standard arrangements or mounting a door externally.

Sizes And Types :-
HG - for openings up to and including 5182 (17`-0" ) high.
HH - for openings over 5182 (17` 0" )and up to and including 6095 (20` 0" ) high.
HI - for openings over 6095 (20` 0" ) and up to and including 7620 (25` 0" ) high.

Key To Diagram :-

Double rollers
Top guides
Top track brackets
Soffit
Top track
Jamb
Hinge section
Leaves
Lattices
Lead post
Bottom guide spigots
Picket and hinge sections
Bottom track
Sump (if required)

Installation Arrangements :-
The illustrations show the most popular methods of installation. Provision can be made for a combination of these arrangements together with external mounting for which we shall be pleased to provide further data when customer's requirements are known.

Folding Leaf Doors, Folding leaf doors, single doors, bi parting doors, free moving sections,
Arrangement 1 :-

Folding Leaf Doors, Folding leaf doors, single doors, bi parting doors, free moving sections,
Arrangement 2 :-

Folding Leaf Doors, Folding leaf doors, single doors, bi parting doors, free moving sections,
Arrangement 3 :-

Head Design :-

Under the rolling load of the door, 36.6 Kg/m2 x door area, the lintel design must not permit the top track to deflect more than 13mm. Door area being height x W1 or W.

It will be seen that the load imposed in arrangement 2 is directly below the lintel whereas with arrangement 1 the additional cantilever effect must be considered; this also applies to a lesser degree with arrangement 3.
The track support brackets require a single bolt fixing for the HG, whereas for the HH and HI shutters two bolts for each bracket are required. Bracket spacing will be determined by consideration of both width and height of opening, details will be provided.

For concrete lintels 1/2"BSW through or rag bolts with 38mm thread projection should be supplied and fitted by you. For steel work we will generally require 14mm dia holes by others, however we shall be pleased to advise further upon receipt of your opening details.

Security :-

Standard
Hasp and stable padlocking facilities are fitted to the inside and outside to enable positive locking from either side. Padlock to provided by you. The staples are fitted to the lead post on single doors.

Optional
An three lever deadlock system can be incorporated. Operating handles and key apertures are provided inside and outside unless otherwise requested.

Sump :-
To enable thorough cleaning of the bottom track, optional sumps can be located behind and beneath track in the bunching area. A drainage system can be coupled to the sump if it is considered that the threshold will be a water collecting area.

Floor Tracks :-
An excavation 180 (7") wide x 100 (4") deep must be provided by the customer to enable our skilled erectors to locate the robust channel bottom track, subsequently to be grouted-in.

SUMP, Folding leaf doors, single doors, bi parting doors, free moving sections,

FLOOR TRACK, Folding leaf doors, single doors, bi parting doors, free moving sections,

Optional Extras :-

Runway Beams
Cut-outs in the standard or special extra wide lead posts can be arranged to accommodate single beams passing through bi-parting manually operated doors. Off -sets from the center line of the opening are provided by using unequal pairs of leaves each side.

Viewing Panels
Viewing panels giving a clear view area of 510 x 125 can be incorporated. Standard glazing of the 5mm toughened glass. Non-standard sizes of glazing can be considered.

Railway Lines
Special bottom tracks can be supplied where railway lines pass through the opening.