structural systems Flashcards

1
Q

design considerations when selection a struct system?

A

appropriate span?
relationship to program? (weight/heavy load?)
related loads
material choice (wood, concrete, etc)
local market

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

short spans

A

usually small or residential projects
wood framing & light gauge steel framing
8’-16’

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

wood framing & light gauge steel framing

A

multiple studs/elements at small increments. overbuilt. easy to install. redundnacy. simple. burn quickly :(

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

heavy timber

A

dangerous if one element fails. in a fire the outer ring will char and protect the interior better

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

types of wood framing

A

balloon, platform, stick built

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

balloon framing

A

historically important to USA. lower skill based, allowed for very fast construction. vergy dangerous for fire back in the day. studs go all the way up
foundation > stud > rim joist > joist

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

platform frame

A

build studs/walls on floor then tilt up. studs stop and start at each floor. better for safety. not good for insulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

medium spans

A

small commercial, everyday business. post & beam traditional style
column > girder > beam > joist > decking
steel 25’-35’
concrete 20’-30’
engineered wood 15’-50’

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

camber

A

preadjust beam so that when loaded it won’t sag

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

long span

A

60’L
many considerations - shipping, deflection, temp expansion/contraction
lack of redundancy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

long span 1 way

A

linear members that span 1 direction, resist beam bending. typically primary members bridge long direction and secondary span in between. support floor or roof

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

long span 2 way

A

distribute loads to supports in both directions. complex 3D load resistance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

girder

A

rolled steel members, max 72’L
can add more capacity by welding top/bottom cover plates
ie. plate girder - steel plate & angles
can be tapered at mid point where moment is higher
typ used in structure to span/transfer load between 2 columns spaced further apart (ie. hotel lobby)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

rigid frame

A

vert/horiz members + joints resist loads by flexure. moment transferred from beams to columns
fixed or pin connections
type for warehouse, manuf plants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

truss

A

composed of straight members formed into triangles. members will either be in tension or compression
very effecient for long span
high strength to weight ratio

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

open webb joist

A

prefab truss
K series - 60’ span
LH series - long span, 96’ span
DLH series - 144’ span

17
Q

vierendeel truss

A

series of rigid rectangular frames (instead of triangles)
used when dont want diagonal members
very large

18
Q

glulam beam

A

max 60’

19
Q

prestressed concrete

A

1-way long span
counteracts tension
single tee, double tee, AASHTO girder

20
Q

post tensioned concrete

A

precast w/ sleeves, run tendons, crank tension when curing
1 way long span

21
Q

6 major considerations of cost of 1 way structure

A

equip, type of system, material, labor, construction time, integrations w/ other bldng systems

22
Q

2 way systems

A

space frames, dome, thin shell, folded plate, suspension

23
Q

space frame

A

3d system that transfers loads thru network of members attached at nodal points
very effecient
resists compression & tension
has alot of redundancy

24
Q

design considerations of 2 way structure

A

insulation, water proofing, drainage, installation $$$

25
Q
A