sonotube wall thickness

[mp3z24]

hey all, ive been lurking here and on some other boards for a couple weeks and i think im gonna dive into the world of diy and make a sonotube sub w/ a shiva 12 and probably the ava250. yeah i know it is about the most generic thing i could make, but i wanna go easy on the first project.

anyway down to the point... i found a sonotube supplier online: White Cap and they have sonotube for what looks like a good price. so what i want to know is, what wall thickness should i use? i see that they have light wall and heavy wall, but i havent seen any details on the dozens of pages i have looked at that say what wall thickness was used. i think it is light wall, but i want to be sure so that i dont get the thin wall and have it be as thick as a cereal box!!! o.k. a little exagerated but you get the point...

so any info would be greatly appreciated

~mike

edit: also, does anyone have the true measurements of the tubes? i.e. if i buy the 24" tube, i assume the interior diameter will be slightly less than the rated 24" nominal diameter. so any help here either for general dimension info?

 

[cyclotronguy]

White Cap's indicated tube diameter is interior measure. Heavy wall is about 1/4 inch thick.

Cyclotronguy

 

[mltaunt]

Sonotube is a form, therefor the nominal dia. is the product you want to end up with. In other words the OD on the concrete is the ID on the form.

 

[HDTVman]

Use the heavy wall stuff, then add plenty of damping to the inside. I use cone shapes for the end caps and mount the drivers in the side using tubes the same size as the driver. Works great.

 

[mp3z24]

thank you for the help.... i was basing my assumption on the idea of nominal pipe sizing, where the listed "size" of the pipe is generally slightly different than the true ID.

for sonotube, 24" is 24", great!!!

i will get the heavy wall as well..

~mike

 

[kelticwizard]

One of the members of this board, Super, just built the very project you are contemplating, though with a different size sonotube.

Here is the link:
http://www.diyaudio.com/forums/showthread.php?threadid=561&highlight=sonotube

He gave this useful link as well:
http://terryctheater.tripod.com/shivaphotoalbum/page12.html

Good luck, and let us know how it comes out!