![]() ![]() This putty worked very well, but the hazard of the asbestos fibres means that the product is no longer available. A small tamper and spike was supplied with the kit. ![]() The user wetted some into a ball (usually by spitting on them) and pushed this plug of putty into the hole. One of the first of these mixtures was produced by Rawlplug and was composed of dry white asbestos fibres, sold loose in a tin. In these cases, a hardening liquid or putty mixture may be used instead. On crumbling walls it may be difficult to drill a clean hole, or the force of the expanding plug may be enough to cause cracking. The first mechanical anchor, the Rawlbolt, was designed in the 1930s by the Rawlplug company and the first fixing for hollow walls was the Toggle Bolt, which was also designed by Rawlplug in 1941. Other varieties of wall plug are mechanical anchors for heavy duty loads and hollow wall fixings for fixing to plasterboard. Most current brands are plastic, first designed in 1958 by German inventor Artur Fischer, known as the Fischer Wall Plug. They imported Indian jute as it possessed natural resistance to the effects of humidity and for particularly damp conditions they developed a range of white bronze plugs. Among the many solutions tested were plugs made of lead, zinc, natural and synthetic rubber, hemp fibres, glass, wood, and paper. The Rawlings brothers conducted thousand of trials using many diverse materials in their search for the perfect plug. Įarly wall plugs were thick-walled fibre tubes, made of parallel strings bonded with glue. Rawlplug gained their prominence from their adoption in the British Museum. These plugs became popular after the First World War, when a demand for retro-fitting existing buildings with new electric lighting coincided with a shortage of labour, encouraging many new labour-saving innovations in the building trade. The original wall plug was invented by John Joseph Rawlings in 1911, and marketed under the name Rawlplug. It also limited the holes' location to the mortar joints. This was time consuming and required a large hole, thus more patching of the wall afterwards. ![]() Different types have different levels of strength and can be used on different types of surfaces.īefore commercial wall plugs, fixings were made to brick or masonry walls by chiselling a groove into a soft mortar joint, hammering in a crude wooden plug and then attaching to the wooden plug. Such anchors can attach one object to another in situations where screws, nails, adhesives, or other simple fasteners are either impractical or ineffective. ![]() As the screw enters the plug, the soft material of the plug expands conforming tightly to the wall material. This is inserted loosely into a drilled hole, then a screw is tightened into the centre. There are many forms of wall plug, but the most common principle is to use a tapered tube of soft material, such as plastic. In US English, mentions of drywall anchors are sometimes meant (and taken) to refer specifically to the type of plastic wall plugs with expandable wings for hollow walls, in contradistinction with mollies and toggle bolts. It is a type of anchor that, for example, allows screws to be fitted into masonry walls. A wall plug (UK English), also known as an anchor (US) or " Rawlplug" (UK), is a fibre or plastic (originally wood) insert used to enable the attachment of a screw in material that is porous or brittle or that would otherwise not support the weight of the object attached with the screw. ![]()
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