For this assignment you will use the attached set of drawings for a small Residential Building.

Note that the sizes of the members shown on the drawings will not necessarily match the sizes

that you will determine in this assignment.

You will assume the following for this assignment:

$$ Specified Dead Load of $0\mathrm{.}6$ kPa

$$ Specified Live Load as per Residential Construction $(1\mathrm{.}9$ kPa$)$

$$ Live Load Deflection Limit for Floor Structure $($Joists and Beams$)$ of L$/360$

$$ Total Load Deflection Limit for Floor Structure $($Joists and Beams$)$ of L$/180$

$$ Assume all members are SPF No$1/$No$2$ grade unless otherwise stated

$$ Assume any $2$x$4$s and $2$x$6$s are SPF Stud Grade

$$ Assume the concrete foundation wall is $10$ thick.

Question $1$:

$(6$ Marks$)$ Using the CWC tables, complete the following:

$$ Determine the required size of built$-$up floor beams supporting the main floor. Check

both total load and live load deflection criteria.

$$ Check the bearing capacity at the supports assuming $2$ bearing length. Note that

for the bearing check of a built$-$up beam, you must multiply qr by the number of

plies of your beam.

The beams are shown on the foundation plan, and support the main floor but not the roof.

Assume the following:

$$ The beams are simply supported and span from column center to column center

and$/$or from column center to the exterior foundation wall.

$$ The beams are fully laterally supported.

$$ Only design one beam size, and base it on the worst$-$case scenario for span.

Question $2$:

$(5$ Marks$)$ Using the CWC tables, complete the following:

$$ Determine the required size of floor joists supporting the main floor. Check both total

load and live load deflection criteria.

$$ Check the bearing capacity at the support assuming.

The floor joists are shown on the foundation plan, and support the main floor. Assume the

following:

$$ Assume joist spacing of $24.$

$$ The joists are simply supported and span from the exterior wall to the interior

beam $($to determine joist span, you will use the beam width per your answer from

Question $1).$

$$ The joists have bearing length at the wall of $2$ and are supported at the beam by a joist

hanger similar to the one shown below, where the dimension $$B$$ is $1.$

Question $3$:

$(4$ Marks$)$ Using the CWC tables, complete the following:

$$ Determine the required size of a No$\mathrm{.}1$ SPF sawn timber column supporting the

beams from question $1($supporting main floor$).$

The columns are shown on the foundation plan, and support the main floor but not the roof.

Assume the following:

$$ The columns are unsupported for a height of $9$

$$ The columns are pinned on both ends.

Question $4$:

$(2$ Marks$)$ Repeat Question $3,$ but for a built$-$up column using No$\mathrm{.}1/$No$\mathrm{.}2$ SPF$.2$x$6$s would be

preferable to use.

Question $5$:

$(3$ Marks$)$ Using the CWC tables, complete the following

$$ Determine the required size for the studs for wall if the columns$/$beams supporting

the main floor were replaced with a stud wall instead.

Assume the following:

$$ The studs are ideally $2$x$4$s spaced at $24.$ If that does not work, a spacing of $16$

would be acceptable $($with $2$x$4$s$).$ If that also does not work, then $2$x$6$s should be

used at $600$ or $400$ spacing.

$$ The studs are sheathed on both sides

$$ The studs are pinned and laterally restrained at the top and bottom.

$$ The height of the studs can be assumed to be $9\mathrm{.}1$