Post+and+Lintels

The biggest disadvantages to this type of construction is the limited weight that can be held up, and the small distances required between the posts. Roman developments of the arch allowed for much larger structures to be constructed. There are two main forces acting upon the post and lintel: compression and tension. The two posts are under compression from the weight of the lintel (or beam) above. The underside of the lintel is under tension, while the topside is under compression.
 * Post and lintel** is a simple construction technique, also called "post and beam", where a horizontal member (the lintel) is supported by two vertical posts at either end. This very simple form is commonly used to support windows and doors.

Lintels may be made of wood, stone, steel or reinforced or pre tensioned concrete. For example, at Stonehenge, stone lintels top off some of the megaliths. In typical homes today, lintels are commonly used in fireplaces where one will span the opening of the firebox. In this use they are most often steel, either straight for a square opening or arched for a more decorative effect.
 * Lintel’s job** A //lintel// or //header// is a horizontal beam used in the construction of buildings, and is a major architectural contribution of ancient Greece. It usually supports the masonry above a window or door opening. (Also sometimes spelled 'lintol', 'lintil',' lyntil'.)

The job of the post is to support the lintel and its loads without crushing or buckling
 * Post’s job**

Prehistoric times Egyptian temples Greek temples
 * Oringins** (history)[[image:http://upload.wikimedia.org/wikipedia/commons/thumb/9/95/Stonehenge_Inside_Facing_NE_April_2005.jpg/800px-Stonehenge_Inside_Facing_NE_April_2005.jpg width="426" height="320" align="right"]]

Stone Steal Wood Iron Rainforced concrete Brick Stonehenge is an example of post and lintel construction
 * Differente materials**:

Slab Beams Columns Lower columns Foundation Soil
 * How is a load supported in framed structur?**