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– Flats or angles which can be welded towards the grating panel and nosing of the stair tread and therefore are bolted to your stair stringer to assistance the tread. Jarak masing-masing cross bar ini teratur sehingga nampak serasi dan menimbulkan ketahanan yang luar biasa. Semakin sempit jaraknya, ketahan steel grating tersebut terhadap tekan