The covered seat shown at [Fig. 217] is one that may be constructed as shown, or modified in size, proportions, etc.
Small as it is, it will tax the skill of the young worker, and give him many of the problems of outdoor construction to figure out. It includes the setting and levelling of posts, framing, roofing, flooring, etc.
Fig. 217. A covered seat
The material necessary should be first carefully estimated, with allowance made for waste. This is an item often forgotten by the amateur, and one especially to be provided for in framing. If the dimensions are to vary from those shown in our sketch, it would be wise to make a careful drawing first. In all outdoor structures, wind, rain, snow, and the effect of strong sunlight must be considered.
As this shelter is primarily for a tennis court, the timbers for the frame should be planed by hand or dressed at the mill, when purchased.
The 4 × 4 uprights should be bought 12 feet long, as this is a standard size, and set into the ground deep enough to bring the top nine feet above ground. The temptation to place posts only a little way in the ground must be overcome. The roof should be counted on to withstand a wind pressure of sixty miles an hour, and three feet in the ground is necessary in this case, as there are no braces to help support it.
Having cut the mortises for the horizontal tie piece a, place the first post in the hole dug for it, tamp the earth around it, and plumb with "level and plumb."
Another method would be to lay both uprights on the ground, place the tie piece in position, fasten with wooden pins driven through holes bored through the mortise and tenon joints, and nail the 2 × 4 plate on top of both posts. Then raise the structure, and place both posts in their respective holes at the same time.