rules for dugout construction

[JEL]

Should be designated for players, coaches, batboys and official representatives of the team only. There shall be no smoking in this area.

Thats per ASA rule book, and is all I am aware of. I would suggest a fence/barrier/gate, to help keep errant throws out. Also equipment shelves, or areas. Make large enough to accomodate larger teams, and keep it behind fencing, so no extra corners in playing area develop. Compare the fields you have seen and take the best from all. Give some thought to a comfort station for the umpires, stocked with air conditioner, cold drinks, sandwiches, sunflower seeds etc. (it was worth a try!)