Good morning, I need to understand if it is possible to realize a fence with locked gate even over extended runs for the henhouse ... measures Cm. 400 x 200 x 170 h.

Hello and thank you to write us !
In general we can build it, it is still of a length to be assembled at least in two parts for transportation reasons.
If you can send me a picture of how he would like the fence, or contact me by phone for more information, I prepare a quotation.
For a reference as I understand it, it could be a type the following solution:

COOP WOODEN FENCE WITH LARGE INTEGRATED