Tests of Adhesives to Augment Nails in Wind Uplift Resistance of Roofs

Abstract

The addition of adhesives to resist uplift wind forces at the roof framing-to-sheathing connection was tested. Two specimen configurations were used to compare the tensile resistance of typical nail connections to that of connections that also included acrylic foam tape or construction adhesive. A set of small specimens had a single nail connecting the sheathing to the framing, and a set of larger specimens had three nails. Connections were tested using monotonic deflection rates and a cyclic loading protocol that was a modified version of the CUREE protocol. Specimens were tested at several monotonic deflection rates. In general, the faster deflection rates increased the connection capacity. The results demonstrated that the specimens constructed with the addition of adhesives provided an improvement over the ones with only a nail. The addition of construction adhesive resulted in the highest resistances for monotonic tests, whereas the addition of adhesive tape provided the most strength in the cyclic tests.