#jualgratingsteel #gratingsteel #steelgrating #pabrikgratingsteel #produsengratingsteel #hargagratingsteel #fabrikasigratingsteel #besigrating #gratingmurah #gratingstandard #gratingcustom #gratinganaktangga #gratingdrainase #tanyaajadulu #intanbumiperkasa the favored vertical bar grating spacing is 30mm, 40mm or 60mm, horizontal bar grating is 50