Posted By SimonD on 30 Dec 2010 04:38 PM
An 8" thick 26ga. steel skinned SIP with 1lb. density EPS foam core can clearspan 18'-0" up to a wind speed of 123 mph. This is a readily available non custom panel specification that several companies supply. The specifics of your project will determine if this panel is suitable for your project.

Simion;

is that 1 lb. nominal or 1 lb. minimum ?

Chris,

The engineering I was looking at was for Type I EPS foam which has a density range of 0.9 to 1.14 lbs/cu ft. The engineering factors in the variation in foam density or any small flaws in the manufacturing by having a 2.5X safety factor on the load calcs. By the way, the deflection would be L/180.

Posted By SimonD on 31 Dec 2010 01:37 AM
Chris,

The engineering I was looking at was for Type I EPS foam which has a density range of 0.9 to 1.14 lbs/cu ft. The engineering factors in the variation in foam density or any small flaws in the manufacturing by having a 2.5X safety factor on the load calcs. By the way, the deflection would be L/180.

Simon;

Type I minimum is .90 density, our panels use Type VIII which is a minimum 1.15 lbs/cu ft. density, not only does the adhesive adhere better to the Type VIII, the core itself has 30% greater compressive resistance and 20% greater flexural strength. With these factors we are capable of achieving greater spans.
Our 6" panel has a safety factor of 3.0X and will span 18 ft. under those same conditions

Type VIII also has 5% greater R value than Type I