J1 - Seismic

Question 1

Load path?

Answer 1

Provide a continuous transfer of loads to the foundation

Question 2

Liquefaction?

Answer 2

When soil acts like a liquid

Question 3

Tying footings to the foundation wall and anchor bolts?

Answer 3

Rebar & dowels

Question 4

when rods used to provide a continuous tie from the top of the building to the foundation?

Answer 4

Couplers are used to join the sections

Question 5

Wall to floor system strap

Answer 5

Tie upper wall to the lower wall to the floor system

Question 6

Drag strut?

Answer 6

maintain horizontal load, connects a beam or truss to the top plate

completes the load path and allows loads to be transferred out of the roof or floor sheathing into the wall system where the shear walls are.

Question 7

Lateral force?

Answer 7

Force imposed on a building by an earthquake, moves the building sideways

Question 8

How must a building be constructed to withstand seismic events?

Answer 8

That the studs work togehter, along wit the sheathing

Question 9

Inertia?

Answer 9

As the foundation can move, the upper part of the building may remain static,

the heavier the building, the the inertia

Question 10

building drift?

Answer 10

side to-side movement of a building in relation to its stationary foundation

Question 11

How do you build to reduce drift?

Answer 11

reduce the percentage of drift with greater stiffness

Question 12

Ductility?

Answer 12

Ability which a material can bend or twist without breaking

wood frame is more ductile than concrete

Question 13

Liquefaction?

Answer 13

Soil acts like a liquid.

Question 14

Proximity to a fault line?

Answer 14

Closer building is to a fault line, the more severe the force of an earthquake will be

Question 15

Weight limitations?

Answer 15

Heavier the building, the greater the stresse

wood frame construction is lighter wiehfght and has a high weight to strength ratio

Question 16

An ideal house?

Answer 16

A simple rectangle, braced bearing walls directly above and below each floor, evenly and symmetrically distributed throughout and increasing in length in the lower floors.

Question 17

What results in disproportionate loading?

Answer 17

Unbalanced loading (floors that are heavier than others)

Question 18

Exterior veneers:

Answer 18

Add more weight
Reduce ductility of a wall making it more susceptible to failure

stucco lath surrounds entire structure and helps

Question 19

Braced wall band:

Answer 19

imaginary continuous straight band extending vertically and horizontally through the building or part of the building, within which braced wall panels are constructed

Question 20

Foundation attachment:

Answer 20

Each wall-braced wall panel must have at least: two anchor bolts where two or more floors are supported by a foundation and the SA(0.2) is greater than 0.7

Question 21

Floor system attachment

Answer 21

Boxing rim joist that uspport braced wall panels need to be toenailed to the plates they rest on with 3 1/4” nails at 6 oc

Question 22

Support of walls for fastening:

Answer 22

Load bearing & non-load-bearing walls braced wall panels must be blocked under or otherwise supported to allow their bottom plates to be fastened down with 3 1/4 nails at 6

Question 23

Wall Sheathing attachment:

Answer 23

Braced wall panels require 63mm (2.5” nails instead of minimum 51 mm (2”) if lumber sheathing is used, it must be installed diagonally across the studs

Question 24

Roof sheathing:

Answer 24

Acts as a diaphragm, must have full panel type or diagonally applied

Requires 2 1/2” nails instead of min 2”

Question 25

Floor systems:

Answer 25

decrease on centre spacing and increase size to increaxe overall structural integrity

primary lateral load transfer in floor system through boxing joist

Question 26

On wall bearing walls to fully transfer load

Answer 26

Use full depth blocking beneath

Question 27

How can you improve floor’s lateral resistance?

Answer 27

Increasing the floor sheathing thickness