A to Z of On-Site Spraying Part 2
…PLEASE SEE PART 1 FOR DEFINITIONS UNDER THE LETTERS A TO L.
MAGNAGRID – This ceiling system consists of modules of interlocking lengths of aluminium with the choice of having different sized open cells. Polyester can be laid over the top for insulation and to conceal the structure of the ceiling.
MEWPs – Mobile Elevated Working Platforms are machines that enable a person to work at height in a safe way. They consist of a safe platform for workers and their tools. This umbrella term includes Cherry Pickers, Scissor Lifts, Vehicle-Mounted Booms, Access Platforms and Aerial Platforms.
MOBILE ACCESS TOWERS – Also known as Mobile Scaffold Towers, they are usually made from aluminium alloys or fibreglass and have platforms to support people working at height. Sometimes they have wheels at the bottom, so they can be moved easily.
MOLDINGS – A decorative architectural feature usually made out of wood, stone or plastic. This ornamental strip is used to embellish a wall, door or building exterior and is sometimes called mold.
NON-ISOCYANATE TWO PACK PAINTS – Isocyanates are the raw materials used to make all polyurethane products. Some water-based paints and almost all base coats and lacquers contain isocyanates and they are widely used in vehicle repair bodyshops. The main cause of occupational asthma is due to the spraying of 2-pack isocyanate paints and they can irritate the skin and eyes which is why our sprayers at Vanda Coatings do not use them.
OXIDISE – This involves a substance having a chemical reaction with oxygen which then leads to the formation of an oxide. Chemically, the positive charge of an element is increased because electrons are removed. The oxidisation of metal causes a layer of metal oxide to form and this is known as rust.
PARAPET – A barrier or low wall at the edge of a platform, balcony, roof, terrace or bridge used for protection and safety.
PICKERS – See Cherry Picker in Part 1 of the A to Z of On-Site Spraying.
POWDER COATING – Dry powder paint is applied to a surface and a curing oven melts the coating so that it flows to form a smooth layer which then hardens and adheres to the surface as it dries. It does not need a solvent, but because of the intense heat needed to cure it powder coating cannot be applied on-site.
RAL COLOURS – RAL stands for Reichs-Ausschuß für Lieferbedingungen und Gütesicherung (Imperial Commission for Delivery Terms and Quality Assurance). This German system standardised colours using numbers and names to identify each one. The colour matching classification is used for coatings including paint, varnish and powder coating throughout Europe in the construction industry, architecture and road safety.
ROLLER SHUTTER – This type of shutter is usually metal and protects a door, window or shop front from weathering and break-ins. A roller shutter is made of horizontal slats that are hinged, so that when it is opened it is able to roll into the lintel above the opening.
SCISSOR LIFTS – See MEWPs. A platform that can be elevated vertically by folding criss-cross supports and is used for added working height.
SOFFIT – This is the finished underside of a fascia or other architectural structure and is sometimes called the eave.
SPA – The Safety Pass Alliance (SPA) delivers the training, accreditation and UKPIA passports (refer to the definition below) to ensure individuals can work on petrol retail sites up to a high standard of safety specifically in terms of working with hazardous substances. This training and accreditation is carried out on behalf of oil companies and petrol retailers and is sometimes referred to as the ‘Forecourt Passport Scheme’.
SPRAY PAINTING – A large surface area can be covered with an even coating of paint when automated or hand-held spray guns are used. The devices have interchangeable heads in order to control the patterns of spray and there are different types of spray guns. This method is much quicker than painting with a traditional brush and does not leave any brush marks.
STRINGERS – These are the vertical structures in stairways that support the treads (the horizontal step) and risers (the vertical part of a step).
STRIPPED BACK – The outer coating from the metal surface or substrate is removed by mechanical or chemical means for a smooth surface. This is necessary before re-spraying in order to achieve a sleek finish.
SUBSTRATE – The underlying base material of a surface. It can be any layer lying underneath another, but usually refers to the metal that is to be re-sprayed.
SUSPENDED CEILING – This is sometimes called a drop ceiling and refers to a secondary ceiling that hangs below the main overhead structure using cables or wires. It usually consists of rectangular tiles that are installed into an aluminium framework. These tiles may either be metal pan or mineral fibre. A false ceiling is an ideal insulator and can also conceal the underside of the floor above as well as wires and pipes.
TWO PACK ACRYLICS – This is a type of paint used in spray painting metalwork and it is called Two Pack because as well as the colour it needs hardener in order for it to set. There are two types of Two Pack paint. Metallic and pearl colours consist of a basecoat which contains thinners and they need a clearcoat with a hardener to be sprayed on top of it. Solid colours that are non-metallic are mixed with thinners and hardener and do not need a clearcoat.
UKPIA – United Kingdom Petroleum Industry Association (UKPIA) accreditation is certified by the oil industry and means an individual has been trained in dealing with various hazards related to working on petrol filling stations with an understanding of general health and safety. Also refer to SPA above.
VOC EMISSIONS – Volatile Organic Compounds have the ability to evaporate into the air due to their low boiling point. Most odours are VOCs and they can be natural or chemical compounds. Some VOCs can be harmful to health, so there is legislation regarding the health and safety issue of indoor air quality.