Question about plywood grading and manufacture in shields

[Kansas]

I am writing today to request more information about cores for shields. I have searched around the form and I have not been able to find anyone that talks about shield cores in actual construction industry standards. I bring this up only because I want to maximize the lightness of a shield without spending every dime I have.

In short what exactly is Tech-Ply, it is obviously some sort of brand name and/or manufacturing process that is owned by a specific company. So, do I want;

A. 3/8", 1/2", or 3/4" Plywood for a shield core.

B. I already understand that I need to completely stay away from OSD/OSB and also shun CDX plywood.

C. Should I Be buying a "Sturdy Floor" (heavy duty 1/2" or 3/4") plywood for sub-flooring? Or should I be looking for a single lumber plywood (Oak/Maple) in a grade A/A A/B A/C or B/B B/C?

D. Should I be looking at maybe a water resistant or marine plywood?

I would hope that there is someone out there that can related to what I am saying and also give me some good advice. I appreciate your time and I look forward to your quick response.

Will

[Peregrine]

tecply 1/4" 5 layer birch underlayment

[Kansas]

Thank you for the quick response I will look for some 1/4" 5 layer birch underlayment at Menards.

Also, why doesn't the wiki have a glossary of terms?

[Rasheab]

1. http://www.geddon.org/Weapon_Construction_Basics

2. Because it's a wiki; someone needs to add missing things.

[Kansas]

I just fixed the Tech-ply page on geddon.org. Most references should now route to a page entitled tech-ply.

Will

[Sir Thurat]

In my area, asking for Tech-Ply has gotten my a resounding "* is that?". So, make sure to resort the the 1/4" 5 ply birch if they have no clue what you're talking about. Went to three different supply stores before I found that out.

[Arrakis]

3-ply hardwood plywood works, too. Like Lowes 1/4" SurePly with the little black x's every 4" on one side.

[Sir Thurat]

3-ply hardwood plywood works, too. Like Lowes 1/4" SurePly with the little black x's every 4" on one side.

Any idea of the price per sheet on that, Arrakis?

[Peregrine]

http://www.tecply.com/

[Arrakis]

3-ply hardwood plywood works, too. Like Lowes 1/4" SurePly with the little black x's every 4" on one side.

Any idea of the price per sheet on that, Arrakis?

*shrug*

20something for an 8x4 sheet?

[Kansas]

3-ply hardwood plywood works, too. Like Lowes 1/4" SurePly with the little black x's every 4" on one side.

Any idea of the price per sheet on that, Arrakis?

Just went to Menards in Galesburg, Illinois-
5'x4' 5ply Baltic Birch Underlay- 17.99
4'x8' 5ply Cheap feeling Birch Underlay 18.99
4'x8' Std B/B 1/2" 3ply 20-22 dollars.