CHAPTER 2 Flashcards
When breaching a masonry wall the members should open a
Triangular hole
Steel is ______ equally strong in compression and tension
Almost
When breaching a masonry wall loads coming down a wall to an opening
Do not follow a vertical path. They split and pass on both sides of the opening
When breaching a masonry wall if the wall elements fall part easily during breaching
Stop the breaching operation
If while breaching a masonry wall you find evidence that the wall has been strengthened at that area (evidence of a wall column)
Stop and start somewhere else. You are likely to be under a concentrated load
An arch is under ________ for its entire length
Compression
The thrust of an arch is
Outward
The removal of any part of an arch can cause _______ of the entire arch
Collapse
Because its thrust is downward, a bowstring truss is a
Beam and not an arch
A 20 foot column can carry ______ % of the load of a 10 foot column (both columns of the same cross section)
25%
If a 20 foot column is braced at midpoint (10 feet) and the bracing suddenly fails at a fire, that columns load carrying capacity decreases to _____ of what it was able to support with the bracing
1/4
A static load is a load applied
Slowly and remains constant. A heavy safe is a live static load
A concentrated load is a heavy load located at
One point of a building. A steel beam resting on a masonry wall
An impact load is a load delivered
In a short period of time. A member jumps on a roof
The hierarchy of building elements
Bearing walls Columns Girders Beams (floor and roof) Decks