Flexural testing of structural insulated panels before and after creep testing

The effect of duration load testing on flexural properties structural insulated panels was investigated herein. Structural were manufactured by a member the Insulated Panel Association (SIPA) in accordance with International Code Council-Evaluation Service Report 4689. Two panel depths 16.5 cm and 31.1 (6.5 in. 12.25 in.) tested short 1/3-point bending per American Society for Testing Materials standards. All had joints or discontinuities foam layer location that subject to shear stress during tests. Failure mode all horizontal within layer. Within each depth, no statistically significant differences detected between maximum values before after creep testing. This finding indicates test loading not detrimental strength panels. While results deemed be different Δymax (midspan deflection at Pmax) depth class, they from class. Overall, it appeared there minimal SIPs.