Abnormal facade.  A façade which does not permit the fixing of through ties or non-movable ties.

Adjustable base plate.  A metal base plate embodying a screwjack. 

Adjustable forkhead. A forkhead fitted with a threaded spindle and nut to give adjustable height.

Anchorage. A component cast or fixed into the building for the purpose of attaching a tie. 

Anchor - guy. A pin or tube driven into the ground at approximately 45 degrees to the horizontal to provide an anchorage for a rope. 

Base plate. A metal plate with a spigot for distributing the load from a standard or a raker or other load bearing tube. 

Bay. The space between two adjacent standards along the face of a scaffold. 

Bay length. The distance between the centres of two adjacent standards, measured horizontally. 

Board - clip. A clip for fixing a board to a scaffold tube. 

Board - inside. A board placed between the scaffold and the building on extended transoms, or a hop-up bracket. 

Board - retaining. See brick guard. 

Board - scaffold. A softwood board combined with others to form access, working platforms and generally used for protective components such as toe-boards on a scaffold.  

Bolted tie.   An assembly of nuts, bolts, anchors, rings or tubes fixed into the surface of a building.

Box tie.   An assembly of tubes and couplers forming a tie for the scaffold by enclosing a feature such a column.

Brace. A tube placed diagonally with respect to the vertical or horizontal members of a scaffold to stiffen the angles or to stiffen the end support of a beam.

Brace - façade or face. A brace parallel to the face of a building.

Brace - knee.   A brace across the corner of an opening in a scaffold to stiffen the end support of a beam.

Brace - ledger or cross. A brace at right angles to the building.

Brace – longitudinal.   A brace in the plane of a longer dimension of the scaffold, particularly in birdcages. 

Brace – plan. A brace in a horizontal plane.

Brace – transverse. A brace in the plane of a shorter dimension of the scaffold.

Bracket – hop-up or extension.   A bracket to attach (usually to the inside of a scaffold) to enable boards to be placed between the scaffold and the building.

Brick guard. (Also retaining boards). A barrier, usually of a course meshes filling the gap between the guard-rail and the toe-board, and sometimes incorporating one or both of these components.

Bridle. A horizontal tube fixed across the opening or parallel to the face of a building to support the inner end of a putlog transom or tie tube.

Bridle – inside or outside.  A bridle either inside or outside a building wall.

Bridle – vertical.  A vertical tube performing the same function as a bridle.

Butting transoms. A transom extended inwards to butt the building to prevent the scaffold moving towards the building.

Butt tube. A short length of tube.

Butting tube.   A tube which butts up against the façade of a building or other surface to prevent the scaffold towards that surface.

Castor. A swivelling wheel secured to the base of a vertical member for the purpose of mobilising the scaffold.

Check coupler or safety coupler. A coupler added to a joint under load to give security to the coupler(s) carrying the load. 

Chord. The principal longitudinal member(s) of a beam or truss.

Chord stiffener. A tube fixed at right angles to the chord of a prefabricated rafter, beam or truss for the purpose of preventing buckling.

Coupler – fixed finial. A coupler to fix a tube across the end of another at right angles in the same plane, as in the guard-rails.

Coupler – parallel. A coupler used to join two tubes in parallel.

Coupler – purlin, rafter or ridge. Special angle or variable angle couplers for joining members in sheeted building and roofs.

Coupler – putlog. A coupler used for fixing a putlog or transom to a ledger, or to connect a tube used only as a guard-rail to a standard.

Coupler – right-angle. A coupler used to join tubes at right-angles.

Coupler – sleeve.  An external coupler used to join one tube another coaxially

Coupler – supplementary. Coupler(s) added to a joint to back up the main coupler taking the load when the estimated load on the joint is in the excess of the safe working load of the main coupler.

Coupler – swivel finial. A coupler to fix a tube across the end of another in the same plane but at an angle, as the handrail to a stair.

Crane – jib. A small crane specially adapted for pivotal mounting to a scaffold tube.

Decking. The board(s) or units forming the working platform.

Dowel pin. See pigot pin.

End guard-rail. A guard-rail placed across the end of a scaffold or used to isolate unboarded parts.

End toe-board. A toe-board at the end or a scaffold or at the end of a boarded portion of it.

End toe-board clip. A similar device to the toe-board clip for the use on end toe-boards.

Expanding spigot. A device designed to expand and grip the inside of a tube. Used for the joining tubes.

Façade – abnormal. A façade which does not permit the fixing of through ties or non-movable ties.

Façade brace. Face brace. A brace parallel to the face of a building.

Façade – normal. A façade which permits the fixing of through ties or non-movable ties.

Fittings. A general term embracing components other than couplers.

Forkhead. A U-shaped housing for assembly on the end of a tube to accept bearers.

Forkhead – rocking or swivel. A forkhead to accept bearers at a range of angles.

Gin wheel or block. A single pulley for fibre ropes attached to a scaffold for raising or lowering materials.

Going. The horizontal distance between the nosings of two consecutive steps of a stair measured in a horizontal line.

Guard-rail. A member incorporated in a structure to prevent the fall of a person from a platform or access way.

Guard-rail post. A vertical tube, frequently a puncheon supporting a guard-rail.

Guard-rail – end. A guard-rail placed across the end of a scaffold or used to isolate unboarded parts.

Guy anchor. A pin or tube driven into the ground at approximately 45 degrees to the horizontal to provide an anchorage for a rope.

Height. The height measured from the foundation to the top assembly of ledgers and transoms.

Hop-up or extension bracket. A bracket to attach usually to the inside of a scaffold to enable boards to be placed between the scaffold and the building.

Independent tied scaffold. A scaffold which has two lines of standards, one line supporting the outside of the deck and one inside. The transoms are not built into the wall of the building. It is not free-standing, but relies on the building for stability.

Inside board. A board placed between the scaffold and the building on extended transoms, or hop-up brackets.

Interlock pin. See spigot pin.

Jib crane. A small crane specially adapted for pivotal mounting to a scaffold tube.

Joint pin. An expanding fitting placed in the bore of a tube to connect one tube to another coaxially (see spigot).

Kentledge. Dead weight, built-up or added to a structure to ensure adequate stability.

Ledger. A longitudinal tube normally fixed parallel to the face of a building in the direction of the larger dimensions of the scaffold. It acts as a support for the putlogs and the transoms and frequently for the tie tubes and ledger braces and is fixed to the adjacent standards.

Ledger or cross brace. A brace at right angles to the building.

Lift. The assembly of ledgers and transoms forming each horizontal level of the scaffold.

Lift – foot. A lift erected near to the ground.

Lift head room. The clear distance between a platform and the tubular assembly of the lift above.

Light height. The vertical distance between two lifts, measured centre to centre.

Lip tie. An assembly of tubes forming an L or J shaped hook around a part of a building.

Lip tie – double. A lip tie which is a push/pull tie, i.e. has a cross tube on the back and front of the wall.

Longitudinal brace. A brace in the plane of the longer dimension of the scaffold, particularly in birdcages.

Movable ties. A tie which may be temporarily moved for the execution of work.

Normal façade. A façade which permits the fixing of through ties and non-movable ties.

Parallel coupler. A coupler used to joint two tubes in parallel. 

Plan brace. A brace in a horizontal plane.

Prop tie. An assembly of telescopic props and/or scaffold tube jacked or wedged between the floors of a storey inside a building and including a tie tube.

Puncheon. A vertical tube supported at its lower end by another scaffold tube or beam and not by the ground or on a deck.

Purlin. A tube secured to the rafters of a building and parallel to the ridge for the purpose of attaching the roof covering and to act as a top chord stiffener for the rafter beam.

Push/pull tie. A tie which acts to prevent the scaffold moving either towards or away from the building, e.g. a reveal tie, a box tie, a double lip tie, a bolted tie with a tie tube.

Putlog. A tube with a blade or flattened end, to rest in or on part of the brickwork or structure.

Putlog adapter. A fitting to provide a putlog blade on the end of scaffold tube.

Putlog coupler. A coupler used for fixing a putlog or transom to a ledger, or to connect a tube used only as a guard-rail to a standard.

Rafter and rafter beam. A transverse tube, beam or truss in a building spanning across a roof or from the eaves to the ridge.

Raker. An inclined load-bearing tube.

Retaining bar. A strip or device fixed across the top of the decking to hold it down.

Retaining boards. See brick guard.

Reveal screw pin. A fitting used for tightening a reveal tube between two opposing surfaces.

Reveal tie. The assembly of a reveal tube with wedges or screwed fittings, and pads, if required, fixed between opposing faces of an opening in a wall together with the tie tube.

Reveal tube. A tube fixed by means of a threaded fitting or by wedging between two opposing surfaces of a structure, e.g. between two window reveals, to form an anchor to which the scaffolding may be tied.

Right-angle coupler. A coupler used to join tubes at right-angles.

Rise. The vertical distance between two steps of a stair.

Roofing clip or sheeting clip. A fitting for fixing roof or wall sheeting to tubes in structures without the need for holes in the sheeting.

Scaffold. A temporary structure which provides access, or from which persons work, or which is used to support materials, plant or equipment.

Scaffold board. A softwood board combined with others for form access, working platforms and generally used for protective components such as toe-boards on a scaffold.

Scaffold – free standing. A scaffold which is not attached to any other structure but is stable in itself or, if necessary, stabilised by rakers and/or anchors.

Scaffold – independent tied. A scaffold which has two lines of standards, one line supporting the outside of the deck and one the inside. The transoms are not built into the wall of the building. But relies on the building for stability.

Scaffold – putlog. A scaffold which has one line of standards to support the outside edge of the deck and utilises the wall being built or the building to support the inside edge.

Scaffold – slung. A scaffold hanging on tubes, ropes or chains from a structure overhead. It is not capable of being moved or lowered.

Scaffold – suspended. A scaffold hanging on ropes which is capable of being raised and lowered.

Sheeting. Horizontal, vertical or including sheets of materials, such as corrugated metal or plastic sheet, attached to a scaffold in order to provide protection from the effects of the weather or alternatively to protect the surrounding area from the effects of works being carried out from the scaffold structure.

Sheeting hook. A threaded rod hook with a washer and a nut used for attaching sheeting to tubes.

Sheeting rail.  A horizontal tube fixed to the verticals of a scaffold to support the sheeting.

Sill. See sloe plate.

Skirt. A short portion of a vertical sheeting usually adjacent to the edge of a roof to give extra protection to the area enclosed immediately under the roof.

Sleeve coupler. An external coupler used to join one tube to another coaxially.

Sole board. A timber, concrete or metal spreader used to distribute the load from a standard or base plate to the ground.

Spigot. An internal fitting to join one tube to anther coaxially (see joint pin)

Spigot – expanding. A device designed to expand and grip the inside of a tube. Used for joining tubes.

Spigot pin. A pin placed transversely through the spigot and the scaffold tube to prevent the two from coming apart.

Spine beam. A longitudinal main beam spanning from end to end of a roof at the ridges or eaves.

Standard. A vertical or near vertical tube.

Standards – pairs of. The standards forming the frame at right angles to the building.

Supplementary coupler. Coupler(s) added to a joint to back up the main coupler taking the load when the estimated load on the joint is in excess of the safe working load of the main coupler.

Sway transom. A transom extended inwards in contact with a reveal or the side of a column to prevent the scaffold moving sideways.

Swivel coupler. A coupler used for the joining tubes at an angle other than a right angle.

Swivel finial coupler. A coupler to fix a tube across the end of another in the same plane but at an angle, as the handrail to a staircase.

Tension pin. See spigot pin.

Tie tube. A tube used to connect a scaffold to an anchorage.

Tie or tie assembly. The components attached to an anchorage or the building or framed around a part of it or wedged or screwed into it. Used with a tie tube to secure the scaffold to the structure.

Tie – bolted. An assembly of nuts, bolts, anchors, rings or tubes fixed to the surface of a building.

Tie – box. An assembly of tubes and couplers forming a tie for the scaffold by enclosing a feature such as a column..

Tie – double lip. A lip tie which is a push/pull tie, has a cross tube on the back and front of the wall.

Tie – lip. An assembly of tubes forming an L or J shaped hook round part of a building.

Tie – movable. A tie which may be temporarily moved for the execution of work.

Tie – prop. An assembly of telescopic props and/or scaffold tube jacked or wedged between the floors of a storey inside a building and including a tie tube.

Tie – push/pull. A tie which acts to prevent the scaffold moving either towards or away from the building, e.g. a reveal tie, a box tie, a double lip tie, a bolted tie with a tie tube.

Tie – reveal. The assembly of a reveal tube with wedges or screwed fittings and pads, if required, fixed between opposing faces of an opening in a wall together with the tie tube.

Tie – through. A tie assembly through a window or other opening in a wall.

Tie – wire or band. An assembly of a ring anchor and wire or steel banding used to tie the scaffold to the building.

Toe-board. An upstand normally at the outer edge of a platform intended to prevent materials or operative’s feet slipping off the platform...

Toe-board – end. A toe-board at the end of a scaffold or at the end of a boarded portion of it.

Toe-board clip. A clip used for attaching toe-boards to tubes.

Toe-board – end clip. A similar device to the toe-board clip for use on end toe-boards.

Transom. A tube to connect the outer standards to the inner standards or spanning across ledgers to form the support for boards or units forming the working platform.

Transom – butting. A transom extended inwards to butt the building to prevent the scaffolding moving towards the building.

Transom – needle. A transom extended from or into a building.

Transom – sway. A transom extended inwards in contact with a reveal or the side of a column to prevent the scaffold moving sideways.

Vertical bridle. A vertical tube performing the same function as a bridle.

Width. The width of a scaffold measured at right angles to the ledgers from centre to centre of the upright. Sometimes designated by the number of boards, within the uprights and the number beyond the uprights on extended transoms.

Working platform.   The deck from which building operations are carried out.