Cute Young Brunette Girl Outside At The Old Pole Barn

Pole framing and Pole building framing, commonly known as Pole building (from 'Pole Barns' of 'Pole buildings'), is a simple building technique adapted from the labor intensive post-and-beam construction technique that uses large poles (or squared off posts) as vertical structural members and strong "girts" parallel to the floor at right angles to the posts as the principle structural skeleton. The method was developed and matured during the 1930s when North American farms moved from animal power to internal combustion based machinery and the need for inexpensive farm building grew in consequence. Unlike competing building methods, once the poles, girts, and rafters are set up by a crew of a few people, much of the construction work on a pole built structure can easily be handled by a single individual over the course of a long time period, such as a month or a season.
When literal poles (debarked, delimbed tree trunk sections) are used, the girts and shims are used to square the structure for hanging the wall curtain around, normally a type of vertical hanging siding such as galvanized corrugated sheet steel or board and batten siding was traditional. The girts necessarily are substantial structural members as along any given wall they collectively must bear the weight of any exterior wall and all things hung from it, which on at least two walls includes part of the weight of the roof. In a modern pole built office building or other buildings requiring interior walls and subdivisions interior girts would usually also be added, each a bearing member, sharing and carrying the weight of interior walls and mountings to the posts. In animal husbandry, interior girts would better resist the thrust of jostling animals in a common pen. To add a second floor or loft, joists laid down at right angles to the girts readily make up a new floor level.
On two walls, usually the long wall, the heavy 'beam' function of post and beam or 'top plate' of platform framing methods is analogously performed by the heavier top girts (wider 2x lumber) of those walls. In the technique, the girts are through-bolted by large carriage bolts, and both an inner and outer girt are generally used to support the roof loading, which is frequently a truss roof supporting purlins, not stick built ridge board and rafter construction using rafters. When used, some rafters may be attached directly to the poles. Purlins might also be used when rafters are spaced farther apart, for in either case, purlins are like girts, oriented at right angles to the truss or rafters they cross, as well as the long sheet like metal roofing elements commonly used in roofing and siding Pole buildings.
The techniques originated in the pole barn, which was a quick and economical method of adding outbuildings on a farm as agriculture shifted to equipment dependent and capital intensive agriculture—necessitating sheltering tractors, harvesters, wagons and the like in much greater quantities and sizes. Around North America, many pole built structures are still readily seen in rural and industrial areas, for the galvanized steel siding and roofing of the thirties has proven to be very durable as was much of the shed style vertically oriented plank siding.