Dating Buildings Flashcards
Around what year did construction go from conventional framing to lightweight trusses?
1960
Making trusses was not a new thing, but what was new about them that made them lightweight?
Gusset plates
What does OSB mean and what is a drawback of using it?
Oriented Strand Board
It breaks down easily with water exposure
Which is more stable, lightweight trusses or conventional framing?
Conventional framing
What is a collar tie?
A board that goes across an attic space toward the tip of the roof that provides extra support
Google it and it will show you what I mean
What year were gusset plates patented?
1959
What are 4 characteristics of commercial trusses?
Wide spans/wide spacings
Decreased interior partitions
High Ceilings
Exposed structural members
What are 4 characteristics of residential trusses?
Wide spans
Trusses 24” on center
Increased interior partitions
Complex roof structures
In 30s style buildings, an arch lintel could be an indication of…
Un-reinforced masonry
Higher pitched roofs also mean a bigger ___ ___
Attic space
In 30s style buildings, it was not uncommon for attic spaces to be __ to __ feet
8 to 12
Since attic spaces were bigger in 30s style buildings, they tended to be converted into ____ ____
Living areas
What is a concern of having a wooden floor?
Falling through
Cloth wiring on insulators mean that ____ become a priority concern.
Utilities
Skip sheathing style houses can have multiple layers of roofing which will result in an increased ___ ___
Dead load
The type of ceilings on a 30s style building (Wood lath and plaster expanded wire/wire lath/tin ceiling) can be bad for firefighters for what reason?
It takes a lot of time and manpower to open up the ceiling
What is the typical construction of a 50s style house?
Block/red brick construction
What kind of problem could a steel window cause?
Escape may be difficult because of steel mullions
In 50s style buildings, the introduction of foam to attics has the potential for…
Dropping large sections of ceiling
What was the typical construction of 60s style buildings?
Frame or block walls
Starting in 60s buildings, what were the 4 things that contributed to lightweight construction?
Prefabricated trusses
Gusset plates
2x4 construction
No ridge beams
Drywall provides easy ____
Breaching
2 characteristics of aluminum windows are…
Easy breaching
Self ventilation
From 1980 to current buildings, what becomes critical?
Elapsed time
What are 2 examples of engineered products that replace solid wood?
OSB
TJI
What is the hazard with flex duct?
Extreme entanglement hazard
On 1980 to present style buildings, it’s very possible that _____ is the biggest size of wood used in the construction of the building.
2x4
Study all the pictures in the power point
There’s a lot of them
