CurlyDave
Elite Member
The OP is in Ohio, and from this map http://www.soundfootings.com/pdf/US_Map_Frost_DepthAVG.pdf , the average frost line is certainly less than 30".
While the OP should check local codes, 48" of depth should be more than sufficient.
While flat-bottomed trenches are nice, they are really only necessary on drain lines. Water supply, gas and electric lines are not really effected by small variations in depth.
I totally agree with Eddie on going into the trench. Any trench over waist high can kill you if it collapses and pins even just your legs. Assemble whatever is going into the trench next to it and lower it in.
While the OP should check local codes, 48" of depth should be more than sufficient.
While flat-bottomed trenches are nice, they are really only necessary on drain lines. Water supply, gas and electric lines are not really effected by small variations in depth.
I totally agree with Eddie on going into the trench. Any trench over waist high can kill you if it collapses and pins even just your legs. Assemble whatever is going into the trench next to it and lower it in.