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a guide to safety in the wood products ... - WorkSafe Victoria

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PLANTPermanently fixed physical barrierPermanently fixed physical barriers are normally used where <strong>the</strong>re is norequirement for access dur<strong>in</strong>g operation, ma<strong>in</strong>tenance or clean<strong>in</strong>g of <strong>the</strong> plant.The underside of <strong>the</strong> sp<strong>in</strong>dlemoulder is a permanently fixedguard. The hous<strong>in</strong>g of <strong>the</strong> mach<strong>in</strong>eprevents access <strong>to</strong> <strong>the</strong> mo<strong>to</strong>r, driveshaft or o<strong>the</strong>r dangerous parts.Interlocked physical barrierAn <strong>in</strong>terlock guard is one that is moveable or has a moveable part. The movemen<strong>to</strong>f <strong>the</strong> guard <strong>in</strong>teracts with <strong>the</strong> dangerous parts of <strong>the</strong> plant or <strong>the</strong> control systemof <strong>the</strong> plant <strong>to</strong> prevent motion of <strong>the</strong> dangerous parts while <strong>the</strong> guard is open. The<strong>in</strong>terlock<strong>in</strong>g system must be designed <strong>to</strong> fail <strong>to</strong> <strong>safety</strong> so it can not be defeated.The run-down time needs <strong>to</strong> be taken <strong>in</strong><strong>to</strong> account so that access is only availablewhen sufficient time has lapsed for <strong>the</strong> motion of <strong>the</strong> danger parts has ceased.The cover<strong>in</strong>g doors on <strong>the</strong> saw are<strong>in</strong>terlocked so that when <strong>the</strong> doorsare opened, <strong>the</strong> systems shut downpower and air <strong>to</strong> <strong>the</strong> saw.WORKSAFE VICTORIA / A GUIDE TO SAFETY IN THE WOOD PRODUCTS MANUFACTURING INDUSTRY 9

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