Dog Star
Western Thunderer
Very nice work Martin.
In the Jigs and Gauges thread I have described the reason for inserting a support spacer under the sleeper spacers and I think that with the length of your jig that my reasoning might be just as appropriate. When sliding the completed track panel from the jig there is a danger that one or more sleepers will snag against a spacer - if that happens then there is a shearing force applied to the joint between the chair and sleeper for the sleeper which snags. The support spacer allows me to insert a thin piece of ply or ruler under the ends of the sleepers and hence to lift all of the sleepers at the same time. As soon as the end of the sleepers are above the sleeper spacers then the panel can be lifted from the jig without damage to the fixing of chair to sleeper.
In the Jigs and Gauges thread I have described the reason for inserting a support spacer under the sleeper spacers and I think that with the length of your jig that my reasoning might be just as appropriate. When sliding the completed track panel from the jig there is a danger that one or more sleepers will snag against a spacer - if that happens then there is a shearing force applied to the joint between the chair and sleeper for the sleeper which snags. The support spacer allows me to insert a thin piece of ply or ruler under the ends of the sleepers and hence to lift all of the sleepers at the same time. As soon as the end of the sleepers are above the sleeper spacers then the panel can be lifted from the jig without damage to the fixing of chair to sleeper.