port bracing help

[kirill007]

With glassing, he means use fiberglass+resin, because resin itself doesn't adds a lot of strenght.

Resin is brittle.

I would recommend using fiberglass to reinforce the box+port.

Dowel rods are a good way to brace a port.

[pthrift]

With glassing, he means use fiberglass+resin, because resin itself doesn't adds a lot of strenght.

Resin is brittle.

I would recommend using fiberglass to reinforce the box+port.

Dowel rods are a good way to brace a port.

i thought resin was too brittle; but I have never worked with it very much other than to make a few small panels.

dowel rods or all thread will probably be what I end up using. I already planned on putting 3-6 pieces of all thread thru the box, so I may just run one piece top to bottom and make sure it crosses paths with the port.

[moto211]

i always use mdf for the bracing , or you could use a double layer of mdf, trying using 1" mdf

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Edited January 9, 2011 by moto211

[pthrift]

@moto211:: thanks; but I dont wanna give up that much airspace if I can help it.

[moto211]

well you will be surprised of how little air space it takes up , 27 feet of 2x4 is one cubic ft, and if you use 3/4 x3" mdf is takes 67 feet, to equal 1 cubic ft, but bracing make the box , no bracing , no slamming , a smaller stronger box is better that a bigger box with no bracing !!!! good luck