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...Munro stanley portable skid resistance tester the also known as british pendulum was originally designed in s by percy sigler to measure slip of floors government buildings during late instrument adopted and redesigned road research laboratory now transport trl although basically unchanged w f part instruments limited has continually refined improved original design is used study problems maintenance public highways test frictional new roads markings iron works it potential on pedestrian surfaces health safety executive hse identified that excess slipping accidents uk occur smooth wet regularly walkways offices shopping malls factories airports sports facilities both at stage investigation based izod principle operation a mass rotates about vertical spindle head fitted with rubber slider specific hardness resilience when released from horizontal position strikes sample surface constant velocity distance travelled after striking determined friction value ptv read directly clearly engrav...