Note. -Always install shoring from the top down and remove from the bottom up.
Notes to Table, (1) Two inch diameter cylinders shall have a structural steel tube over-sleeve 3.5 x 3.5 x 0.1875 inches extension (installed over the aluminum over-sleeve extension) or a steel tube over-sleeve 3 x 3 x 0.1875- inch extension (installed without (the aluminum over-sleeve) that extends the full-retracted length of the cylinder. (2) The bottom of the sheeting shall extend within 2 feet of the bottom of the excavation. If there is an indication of a possible loss of soil from behind the support system, sheeting must extend to the bottom of the excavation.
(3) Sheeting is required at each Vertical Shore if raveling or sloughing of the excavation (ace appears likely to occur. (4) Sheeting shall be used. (5) When 4 feet horizontal spacing is exceeded, the open spaces between the sheeting must be monitored for sloughing and raveling of the excavation face. (6) The bottom hydraulic cylinder shall be a maximum of 4 feet above the bottom of the excavation. (7) Sheeting shall extend to the bottom of the excavation.