Size/grade of HO ballast?

[Bob C]

Okay, that 3&1/2" max seems close to me (retired for 2 yrs after 33 walking over the ballast) - but, as a couple have said, it's perception of texture that counts (like RIVETs)! Some stone around tracks is bigger(RIP-RAP used to fill and retain roadbed), or smaller ("walking stone" like driveway gravel for paths, platform areas, around switches in yards where crews must constantly walk), depending on use. Ballast is designed not to compact easily - walking on it is difficult on a slope, hazardous and hard on your LP's ankles, knees, and other parts, if they trip! Railroads do take such factors into account - fine stone is CHEAPER than a LAWSUIT. Hope this helps. Bob C.