How to Build a Portable Greenhouse - Part 5 Interior & Shelving

The above corner illustration, indicates that angle brackets for that situation will need to be specially a made. I would recommend to erect the walls and tack temporary braces across the angles afterwards making a wood template to the right shape and boring bolt holes to guide the blacksmith.

Interior shelving will be of 2in. x 1in. battens nailed to cross rails of the same material and bolted to middle rails of walls (a fixing which will stiffen the whole structure), and intermediate support will be given by the trestles, which have their feet resting on bricks sunk in the ground.

A removable grid similar to the shelving could also be made for the floor. A door of floor boards is most easily made by removing the groove from a board and marking out batten positions in the middle and six inches from each end. The battens are then nailed at right angles to this board and with the four pieces laid on a bench the remaining ones are filled in and nailed through from the front. after which braces are fitted with their loo end on the hinging side. A door which opens outward is generally more convenient in small buildings, and has been  shown here, it would be hung with 5in. tee hinges.

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How to Build a Portable Greenhouse