2x4 fish tank stand plans. Whether your pig is a pet or a part of your farm stock you will want a way to keep the pig safe from predators at night out of the heat of the sun during the day and protected from extreme cold that could harm the pigs health. How to build a diy aquarium stand. The plans shows how to build the gambrel roof as well as the rest of the building. Micro gambrel the micro gambrel measures 8 feet long and 74 wide which is just right for adapting to a trailer for a mobile micro house.