The identified part represents an open string!:)
<span>The answer is post and lintel. This is used on on windows, weight bearing supports trusses, over doors. This kind of construction is used to carry large heavy weight bearing loads of downward force. This is common in home basements where there are long beams and supporting posts beneath.</span>
If you are a producer, you make the items, if you are a consumer, you consume them.
