Cal, Here's what Paul Breed wrote about this a few months ago. Dennis --- Paul Breed <[EMAIL PROTECTED]> wrote: > Here are some specifications for pink and blue foam > All of this foam info was found using the google news group searching..... > > > > In BLUE foam, there are 5 densities available. > > The types are; Residential Sheathing with a Compression Strength of > 15PSI min. (Type X) Square Edge, Tongue and Groove, and Score Board > with > Compression Strength of 25PSI min. (Type IV ) > 40 High Load, with Compression Strength of 40PSI min. > 60 High Load, with Compression Strength of 60PSI min. > 115 High Load, with Compression Strength of 115PSI min. Also available > is Grayboard with a Compression Strength of 15PSI min. > > Dow does not like to list densities for these products, but prefers > that they be specified by compression strength performance. They do > however list the MINIMUM (not actual) DENSITIES for these products. > They > are: Grayboard 1.35 pounds per cubic foot > Residential Sheathing 1.6 lbs\ft^3 > Square Edge, Tongue and Groove, and Score Board 1.6 lbs\ft^3 > 40 High Load 1.8 lbs\ft^3 > 60 High Load 2.2 lbs\ft^3 > 115 High Load 3.0 lbs\ft^3 > > When asked about actual densities, a Dow representative commented > that grayboard was 1.6 lbs\ft^3 and Square Edge etc. was 1.8 lbs\ft^3. > However the Scoreboard that I am using measures 1.6 lbs\ft^3, right at > the minimum density. > > > DAN DEVRIES wrote about substituting High Load 60 for Spyder > Foam. According to Composite Structures Technology, Spyder Foam "has 3 > times the compressive strength of Blue Foam and almost 10 times the > compressive strength of white (1 lb/cu ft) foam and a density of 2.2 > lbs/ft^3." This would be a compressive strength of 75-100PSI. > Therefore > High Load 60 had the same density with a somewhat lower compression > strength (60PSI). > > White expanded polystyrene is also available in several densities > and strengths. Type I is 1 lbs/ft^3 @ 10PSI. Type II is 1.5 lbs/ft^3 @ > 15PSI. Type IX is 2.0 lbs/ft^3 @ 25 PSI. > I used some of the Type II for Hand Launch (successfully ?) because > > > In some parts of the USA Owen Corning pink foam is easier to locate > for wing fabrication than Dow Blue Foam or Spyder foams. The following > technical information pertains to Owens Corning Pink Foam. > > > Owens Corning Products > > Owens has its own line of extruded polystyrene insulation in many > densities and strengths. It is ALL PINK. > > Properties for FOAMULAR 150 are: > Compressive Strength 15psi min. > Flexural Strength 60psi min. > Density 1.4 pounds per cubic foot (approx.) > > Properties for FOAMULAR 250 are: > Compressive Strength 25psi min. > Flexural Strength 75psi min. > Density 1.8 pounds per cubic foot (approx.) > > Properties for FOAMULAR 400 are: > Compressive Strength 40psi min. > Compressive Modulus 1400 psi min. > Flexural Strength 115psi min. > Density 2.04 pounds per cubic foot (average) > > Properties for FOAMULAR 600 are: > Compressive Strength 60psi min. > Compressive Modulus 2200 psi min. > Flexural Strength 140psi min. > Density 2.4 pounds per cubic foot (average) > > > Properties for FOAMULAR 1000 are: > Compressive Strength 100psi min. > Compressive Modulus 3700 psi min. > Flexural Strength 150psi min. > Density 3.6 pounds per cubic foot (average) >
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