Lesson 7 Assessment

Difficulty Level: 3/5

Estimated Time to Complete: 15 minutes

Problem Statement: Single Shearwall Design

The goal of this assignment is to design a single shearwall with multiple segments as shown below:

*Note, the wall height can be changed in the software by going to the “default values” tab in the “settings”.

From the model, apply a factored seismic load V on the shearwall B-1, with a magnitude of 5600 lbs
Vertical dead load on the wall (D): 650 plf
Use plywood for sheathing
No1/No2 SPF (2 x 4) for framing
Stud spacing: 16”
2 Studs at each end of shearwall segments
Hold-down type : HDU5 – SDS2.5
Use hold-downs on all segments
Apply hold-downs at all openings
Use the shearwall deflection to calculate rigidity, and distribute force on wall segments based on rigidity
Always linearize deflection equation

Use the software to design the shearwall and provide answers to the following questions:

The sheathing material information can be found in page 3 of the Design Results.

What is the minimum thickness of the plywood exterior siding needed to resist the applied loads (in inches): *

1.5

1/8

3/8

Based on the Design Summary Form, the following statements are true: *

All shearwalls have sufficient design capacity

All hold-downs have sufficient design capacity

Bottom plate has sufficient perpendicular-to-grain compressive capacity under all wall end studs

All of the above

The critical response ratios of all hold-downs is below 0.70 *

True

False

What is the global deflection of the shearwall (in inches): *

5.50

0.71

0.48

1.20