Lesson 3 Assessment

Why does Sizer default to using a single ply width for calculating the lateral stability factor in built-up members? *

It ensures that the beam is treated as a composite member by default

It assumes adhesive bonding is present in all built-up beams

It provides a more conservative estimate due to potential inadequate fastening

It automatically increases bending design value for all members

What is the primary risk when toggling on the option to calculate unsupported length Lu based on points of zero moment? *

It increases shear forces

It could yield overly conservative design values

It leads to underestimation of beam deflection

It may produce less conservative CL values due to shorter Lu

What is the default lateral support assumption when the member is defined as a beam material type? *

No lateral support is assumed

Continuous lateral support along both top and bottom

Lateral support at both top and bottom at supports only

Lateral support only at mid-span

In the example provided, a 4-ply 2×8 beam with 20' span and middle support is designed. Why does the member fail in the case where lateral support is not provided in the middle of the beam? *

The beam length exceeds allowable code limits

The unsupported length and effective length double, increasing slenderness

The dead load exceeds the beam’s compression capacity

Sheathing was not modelled properly in the software

Sizer Course - US

Question 1

Question 2

Question 3

Question 4