the original a&gr track was formed with t-section rails of birkinshaw's patent design; they were fishbellied with five webs to each long rail, which weighed . the rail head was across and the rail was deep. they were malleable cast iron, except on the soundwell branch where they were wrought iron. the sleepers were limestone blocks square and deep, obtained from a quarry near the keynsham wharf, with chairs weighing each, and an iron pin was used to secure the rails.