The Chairs

There were two kinds of chairs, which could be constructed of any depth to suit the pavement: the joint chair, placed at each semi-joint of the rails, and the intermediate chair, placed at intervals between semi-joints. The vertical slots of the chairs received the web of the head and flange sections of the rails. The T slots received the tie bars and the wedges.

Click image for larger view of joint chair and single chair. (645K) (From Gibbon Catalogue)

Letter from Thomas H. Gibbon to William H. Wahl, Informing that 1600 feet of duplex track was laid on Fourth Avenue in New York, and inviting members of the committee to see it, 12/28/1891 (897K) | Page 2 (786K)