width of trench

[rodcar]

hi all
not sure if in right section, i need to know width of top of trench at 45 degrees from bottom
depth is 1.75m, width at bottom 600mm

[Alexanyan Yuri]

W = Wb + 2 * H / tan(alpha) = 0,60 + 2 * 1.75 / tan(45) = 4.10 m
Did you mean that?