A clip device for fastening first and second structural members typically decking members. The clip device has a base portion with first and second opposed ends and a thickness a first vertical leg portion integral with the leg base portion is horizontally spaced apart from a second vertical leg portion integral with the base portion. Arm flange portions integral to the first and second vertical leg portions are horizontally spaced from the base and aligned respectively towards said first and second opposed ends. A fastener receiving hole in the base is used to attach the clip device to the joist. The base portion, vertical leg portion and arm flange portion define diametrically opposed U-shaped jaw elements for holding the structural member to the joist.