AVS Club Gold
Join Date: Nov 2002
Location: Byhalia, Mississippi. Waaaay down in the Bottoms
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In the photos referenced above, I used selected, straight 2x4" (1.5" x 3.5") lumber because I wanted the added rigidity such lumber would provide such a large frame. Also, I knew there would be a center Channel speaker residing behind the Screen in a Wall Pocket, but with at least 2" protruding past the wall's surface.
Also, the frame was sized so that 3.25" MDF Base Trim could be affixed using the 1.5" face of the Lumber for a "Nailer", with the "Tapered" edge at the inside being the correct dimension required for the given Format. The Trim's 3.25" width was essentially "centered" on the 1.5" width of the Frame, so there was plenty of support.
1" x 4" lumber would by necessity have to be placed / used in the "Flat position....for both the prevention of warp'age / stress related deformation, as well as providing adequate "Face" for applying Trim. 3/4" would not allow for enough support, resulting in either the inside or outside edges of the Trim pitching inward or outward.
But also, when using 1" x 4" in a "Flat" position, barring your ripping the 1x4 down about 1/2", one must make the inside dimension of the Frame match or be slightly "less than" that of the inside dimensions of the Trim. That would mean it would be best to use the next size up in width of MDF Trim and rip it lengthwise down to 3.75" wide so it would allow a very slight overlapping of both the inside and outside edges of the Frame.
To quote James T. Kirk;
"I'm laughing at the superior intellect"