Chapter 6 Alternative Construction Trends Flashcards Preview

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Flashcards in Chapter 6 Alternative Construction Trends Deck (35):
1

Previously, buildings used a ___________approach, but now use a ________ approach

Prescriptive
Performance design

2

Lightweight steel advantages: (5)

Reduced costs
Significant weight reduction
Ease of installation
Resistant to termites and mold
Non combustible to help satisfy codes

3

How thick is the steel used in LW steel construction?

1/8"

4

Components of a LW steel bldg:

C channel, H channel, sills, headers and joists

5

LW steel bldgs will get its strength from

The sheathing, usually OSB

6

Primary collapse concern for a LW steel bldg?

Floor collapse from a basement fire

7

Materials for ICF forms"

Cellular concrete
Cement bonded polystyrene beads
Cement bonded wood fiber (15%cement, 85%EPS)
Combo of 15%cement and 85% wood chips

8

3 ways to build and ICF wall

Flat panel
Post and Beam
Grid block

9

Flat panel ICF:

Most concrete and fire resistant
Low slump high aggregate concrete
Plastic or metal plates
80/20 concrete/EPS

10

Post and Beam ICF

40-60% concrete
Creates a P and B skeleton with some rebar

11

Grid Block

Legos with concrete in the middle
Least fire resistive
Least amount of concrete 20-30%

12

Fire concern for ICF

Though it's supposed to not flame up, it will burn from fire around, causing pyrolization of EPS which is a petroleum product

13

Collapse concern for ICF

roof and floors,
Flat panel will hold longer than P and B and Lego blocks

14

What causes the strength in SIP panels

The synergy of being pressure laminated

15

2 types of straw bale buildings

Load bearing-Nebraska style

Non load bearing

16

How are straw bale buildings pinned together

Wire ties
Wood-bamboo
Sticks
Rebar

17

Two ways to compress a Straw bale bldg

Just the weight of the roof
Compression straps

18

Collapse threat of straw bale bldg

LW roof, especially Live roofs due to the load

19

Advantages of straw clay bldg

Durable
Cost effective
No special tools
Green
Good insulating
Resistant to vermin, rot and fire

20

What's the biggest fire concern for a clay straw bldg?

Contents

Roof and and ceiling collapse is possible

21

How much money has the ARRA allocated to Green building?

80 Billion fucking dollars

22

Challenges of Green Building and firefighting

Alternative power
Unusual dead and live loads
Low mass synthetics
Recycled or repurposed materials

23

Green building, like rammed earth brick, are efficient but can retain heat and products of combustion leading to

Flashover

24

How far apart are the parallel studs in double wall construction

3 1/2"

R value of or more

Gap allows horizontal extension of fire

25

When RSB sheathing is used for walls its applied with the foil side___________for roofs its_________

Out, inward
With 3/4" air space

26

Soil depth of extensive live roof

Of intensive live roof

2-4", limited maintenance

1 foot, regular maintenance

27

4 elements of a live green roof

A building with strong roof system
Multiple membrane to protect the structure from water and drainage
A layer of soil
Planted veggies

28

Electrochromic Windows

Require 1 volt to change the amount of light reflected, but they are harder to break

29

How is AFM/OVE Green?

Reduced the amount of lumber waste
Reduces thermal bridging

30

Spacing for studs in AFM

19.5"-24" instead of 16"

Single 2x4 for top plate

Nailing boards for exterior siding are 2 X 2

31

How much less lumber does AFM use? Reduction in framing factor?

10 - 30%

15%- 25%

32

What is AAC

Auto claved Aerated Concrete
Made from Portland cement, gypsum, water, expanding agents and air
1/5th of wt of CMU
Mostly air

33

Other names for EWP

Manufactured board
Man made wood
Composite wood

34

How much more weight can an FiRP carry over a regular beam?

Twice as much

35

Homes are designed to give the occupants how long to get out?

15 minutes