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« on: April 25, 2020, 09:11:47 PM »
A couple of notes on roundhouse construction.
1) Typically the center of the rear wall panels were designed to "Knock Out" in sufficient width so that only a hole the width of a locomotive was opened and the whole rear wall of that bay was not required to be rebuilt. The walls were permanent but allowance was made for Murphy's Law.
2. Once the railroads began replacing cinder/stone floors with concrete, an "over run pit" was added just at the end of track to drop the front truck/axle. The pit was covered with wood flooring so that was not open but the weight of the locomotive front truck/axle would break the flooring and drop the front truck in an over run situation.
Just a couple of design notes which although construction is not imminent and not Maine 2' gauge prototype, might want to be considered when the time comes.