Pendulum Testing for Businesses & Lawyers from £447

Expert Witness Services & CPR Reports in Slip Injury Claims from £327

Cheap & Quick Off Site Floor Sample Testing from £150


Cheap Floor Tests for Businesses and Lawyers available in In all Major UK Cities and nearby Towns including  Floor Slip Testing  in Scotland – Aberdeen, Glasgow, Edinburgh and Inverness / Floor Safety Risk Assessments in North East England – Middlesborough, South Shields, Newcastle, Stockton on Tees, Darlington / Floor Resistance Testing in North West England – Manchester, Lancaster, Liverpool, Runcorn, Preston, Blackpool, Blackburn Bury, Bolton, Warrington, Widnes, St.Helens (Cheshire) Birkenhead, Ellesmere Port, Chester, Crewe, Oldham, Stockport, Trafford Park. Rochdale, Congleton, Sandbach Macclesfield, / Floor Friction Testing in Wales in Cardiff, Newport, Swansea, Colwyn, Rhyl, Bangor / Pendulum Tests in Northern Central England – Sheffield, Leeds, Bradford (Yorkshire), Rotherham, Wakefield, / Slip Resistance Tests in East England in Hull, Humberside and Lincoln / BS7976-2 Pendulum Tests in the Midlands in– Nottingham, Derby, Rugby, Stoke, Stafford, Birmingham, Wolverhampton, Worcester, / Slip Resistance Flooring Tests in Central England – Northampton, Rugby, Derby, Oxford, Cambridge, Peterborough / HSE Approved Floor Testing in London and Home Counties – Watford, Milton Keynes, St.Albans, Cambridge, Newbury, Reading, Andover, Heathrow / Pendulum Floor Tests in South England – Portsmouth, Brighton, Eastbourne, Southampton, Bournemouth, Salisbury, Isle of Man /  Floor Friction Tests in South West England – Swindon, Bristol, Bath, Plymouth, Exeter, Falmouth, Cheltenham, Gloucester, Taunton, Warwick / Cheap Floor Tests in South East England – Dover, Margate, Rochester, Folkestone, Hastings, Tunbridge Wells,

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Main UK Pendulum Floor Testing offices at Preston, Blackpool (Lancashire) and Banbury, Oxford, Rugby and Coventry, (Oxfordshire and Warwickshire) - United Kingdom

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Pendulum Testing – Tribology - The science thereof and why slips occur

Tribology (Origin: from Greek tribos meaning ‘rubbing’) is the scientific term for the study of interacting surfaces in relative motion including floors. It includes the study of the principles of friction, lubrication and wear.


Understanding COF (Coefficient of Friction)

CoF is a measure of how much resistance there is between two surfaces either at rest (static) or moving; i.e. when the surfaces are in relative motion (dynamic). The Pendulum Test measures dynamic CoF as this is regarded as measuring the action of the heel passing across the floor. The higher the CoF (Or Pendulum Test Value), the higher the slip resistance; the Pendulum Test Equipment measures CoF but multiplies the value found by 100 so it can be easily read on the scale giving you the Pendulum Test Value or Slip Resistance Value (PTV or SRV); note – zero is the worst state

Hydrodynamic Squeeze Film process

Most car drivers will have at some time in their lives experienced ‘hydroplaning’, where the tread of the tyre cannot displace rain water effectively enough and a slip occurs; particularly relevant when the tyre or the road or both are worn. The hydrodynamic process researched by the HSL identifies that the action of a heel on a floor works in exactly the same way. The smoother the floor / the smoother the heel, the more likely a slip will occur; the HSE has identified 90% of slips occur on a smooth wet floor.

Equipment’s that replicate Hydrodynamic Film Squeeze

The Pendulum Test Equipment replicates the process; but many test equipment’s do not do this and that includes the Surface Roughness Test Equipment or ‘Kenny’ named after the character in South Park Cartoons as it looks similar.

The ‘Kenny’ only checks for the roughness of the surface and works the same wet or dry; this is because its prime method of use is to drag a diamond stylus across the floor and the diamond cuts through anything including greasy contaminants

Why slips occur – The behaviour of floors

Slips occur when, in most cases, the heel is prevented in making an effective contact with the floor. This is because there is a contaminant which cannot be compressed into the pores or the grooves of the surface (or shoe heel if the heel edge is contoured which is unlikely, particularly in old worn shoes). As a result the contaminant (wet – for example rain water; or dry – example flour or talcum) will act at a microscopic level like little hard round balls; similar to a cartoon character stepping on marbles.

Floor Contaminant Viscosity

The HSL has also identified the higher the viscosity (thickness of liquid) then the more likely that slip will occur and diluting (with water for example if clearing away a spill) will actually held reduce the problem to a lesser degree.

Floor Contaminant Types

Floor contaminants are not just liquids; there are also dry contaminants as well. In fact, a medium like Talcum powder (Dry contaminant) used as a floor testing medium will seriously reduce the ability to prevent slips as much if not more than pure oil. Wet contaminants can, as examples only, range from blood, coffee, urine, oil, grease and diesel and dry contaminants might include talcum, flour, saw dust, sand, plastic granules, shot blast pellets etc. What is important to understand about contaminants is that you must consider the contaminants either in the area or likely to be walked in / fall onto any floor area you are testing.

The correlation of shoes and floors (and the choice of pendulum slider)

There are literally hundreds of different shoe type compounds and floor types and it would be impossible to create a test regime to cover even a fraction of them; particularly as you would have to consider the amounts of wear, the contaminants, the gait of the person, the cross section of the heels, the length of someone’s leg and so on. Therefore the HSE / HSL has developed the Pendulum Test to consider just 2 prime situations – with Shod Heels (96 Rubber) or with Bare Feet (55 Rubber) and arrived at a PTV, which covers virtually every possibility to give a theoretical and ideal minimum probability of slip of 1 in 1 million – that value is a PTV of 36 using 96 Rubber and 55 rubber (55 at certain temperature ranges) on a horizontal floor.   

Ramp Testing

is a more accurate method to determine the slip relations ship between specific floor types and shoe materials and contaminants but Ramp Testing expects the flooring area tested for, the shoes tested against and the contaminants used must always be the same once the relationship is proven, which in general terms is impossible to control.

Persons slip backwards but fall forwards

When the heel starts to slip (The heel is the body area considered as where slips start) then the foot goes forward and the body goes backwards. But in a fall the foot stays still and the body goes forwards. So you can generally determine, from a person’s injury if they’ve slipped or tripped. False claims might say, for example, “The person slipped on the wet floor and banged the front of their head”, where, in reality a person slipping would have fallen backwards and banged the back of their heads!