SIPs Are A Good Choice In Seismic Zones

SIPs are a strong structural panel building component used in residential houses and commercial buildings for the walls, roofs and floors. SIPs are successfully used in seismic events. To be exact, several of structural insulated panels structures were situated close to the epicenter of the magnitude 6.9 earthquake that struck Kobe, Japan in 1995. A review of such buildings after the earthquake demonstrated that the peculiar performance of SIPs in seismic events is unusual.

SIPs are as a rule famous for great structural integrity, moisture regulation and better insulating properties. Their tighter constructing envelope implies not so much air can get into and out of the building, enabling not so extensive heating and cooling within. This, in turn, creates for a smaller energy output. The huge advantage of SIPs is that in addition to their good-quality composition, Structural Insulated Panels make for quite fast construction times.

SIPs improve their shear strength from the utilizing of outer facings of 7/16″ OSB manufactured in conformance with the PS2 standard for sheathing. Each SIP wall panel is linked to ground plates, and vertical boundary members with fasteners, typically 8d nails. The 8d nails give the transfer of the shear loads from the OSB facings to the wood plating materials while the bond of the OSB to the EPS core provide resistance for the OSB from buckling. Such sort of performance is analogous to conventionally made OSB sheathed shear walls where the OSB gives shear resistance by using fasteners to transfer shear loads to the framing parts.

self build have been reckoned up step by step with OSB sheathed customary walls. Check has been performed by the leader in the development of shear wall design data for light frame walls, APA – The Engineered Wood Association. Check included creating ordinary OSB sheathed 2X shear walls and comparing the performance to SIPs.

Testing was conducted following a seismic check protocol created by the Structural Engineering Association of Southern California (SEAOSC). The check contains imposing a simulated seismic situation to a shear wall and recording the results. The test protocol includes 72 cycles of loading for the shear wall. The outcoming loads and deflection for the conventional shear wall and the Structural Insulated panel wall were approximately equal.

It is advised that SIPs are similar to traditional light frame shear walls with OSB sheathing for performance in seismic situations with proper engineering of links and load transporting.

Future study by industry is anticipated to assist improve the market for Structural Insulated Panels in high seismic regions.

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