Metal stair treads and grating; aluminum stair treads; metal stair treads; metal safety stair treads; metal stair grating; aluminum grating; metal plank-type safety grating; metal safety grating; metal bar grating; metal mid-span support clips for stair treads and gratings and clip assemblies for stair treads and gratings comprising a metal cap screw, an anchor and either a nut or an S-clip

'aluminum':6,19 'anchor':58 'assembl':46 'bar':31 'cap':55 'clip':38,45,67 'compris':52 'either':60 'grate':5,18,20,26,29,32,43,51 'metal':1,9,12,16,21,27,30,33,54 'mid':35 'mid-span':34 'nut':62 'plank':23 'plank-typ':22 's-clip':65 'safeti':13,25,28 'screw':56 'span':36 'stair':2,7,10,14,17,40,48 'support':37 'tread':3,8,11,15,41,49 'type':24

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