Oh, I like all those browns too.

can I use this for SUp 5??

I unpack it, and go to @Last Software>Sketchup 5>Materials, and just stick that .skm in there? I only see jpg files in there now.

Long way is right Susan. Remember when I first showed up? Didn't know anything about computers much less using any kind of programs.

yeah Lewis, I was reading all that and thinking how easy it is to do in SUp .. just draw it to scale, and it'll work/fit perfectly! probably took me 5 minutes to draw, and I even gave him a full sized template to print out.

No way I could be designing and building some of the things I do without SUp ..

hood.pdf

Hey Folks

Someone on one of my Construction Forums was asking "Does anyone know how to calculate the length and radius of a curved hip (in this case an s-curve) rafter. The application is for a plaster vent hood frame".

he had the two radius's (radai?) for the S curve.

He got some answers, here's one.
"Anyway, If you make a line from peek of hood to soffit, determine the rise and run, then you will be able to calculate the hip.

Then, using the line from peek to soffit, plot the curve by dividing the line into x number of pieces.

Now the hip will be proportionally longer than your rafter. Multiply your OC spacing by this ratio to get your hip OC spacing. transfer the altitudes and you got it.

It's either that or scribe it in place using a straight edge."

"If the diagonal for the rafters is 36 and you divide it by 36 while plotting the altitudes, then by dividing the hip by 36 and using each altitude from the rafter to plot the hip you'll be fine.

Say from peek to soffit the run is 12"

The rise is 24"

this is a 24 pitch. the diag is 26 13/16" divide this by 12 is 2 1/4".

plot the s curve from the 24/12 at 2 1/4" intervals.

the hip will be 29 3/8" divided by 12= 2 7/16 intervals

all altitudes are the same."

way too difficult I thought, here's my answer ..

"That's pretty easy to draw using SketchUp David. Do you have a profile or elevation drawing of the hood frame? If so maybe I can help you out." Luckily he did have a SUp model for me to work with.

and here's the tutorial I made for him.

Vent_hood.skp