... instead such as a block chair, L1 bridge chair, check chair, etc. In practice the usage of joint chairs was a bit more random and not always matching the drawings. Most obviously noticeable were the joint chairs at the switch front joint*, and at the ends of the vee rails. It's difficult to find pictures of 12" joint sleepers and chairs at the ends of a track panel, but this LNER pic from Mick Nicholson shows such a sleeper and also S1-J chairs on the switch front: 2_250340_390000000.jpg Notice the S1-J chairs on the first timber beyond the switch tips, which is not per drawing. edited: The middle joint chair on the right-hand side of the picture is broken on the inside and has a loose chair screw. *Some pre-group switches had ordinary 10" sleepers at the switch front (Templot has an option for that in the switch settings), in which case ordinary S1 chairs would be used there. cheers, Martin. posted: 25 Sep 2019 09:27 ...