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 Rivers, MB
 | How long are they?  Even at 14' tall (which is too short to put any larger equipment in and allow for much headroom), you will want 4-6' in the ground.  So they need to be 40' long to get 2 poles out of one.  So best case scenario, you have 16 poles.  3 sided building (open on one end) would give you a 40'x40' with them spaced at 8'. 
 Personally, for that size of building, I would be buying good poles or laminate poles out of 2x6's or 2x8's.  Bit extra but then you have something new.  For minimally more money.
 
 And I wouldn't build a shed with only 14' walls.
 
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