Flush position indicator for fastener installation tool for roof truss framing and construction system

An installation tool for fastening a top plate to a roof support member and other structural connections is adapted to drive threaded fasteners at a pre-established angle. The tool preferably includesa rotary driver assembly and a telescopic tube assembly. A guide head assembly is mounted adjacent the outer end of the telescopic tube assembly. Locating or reference structures are used to properlyprecisely set the drive angle of the fastener. Various indicators mounted to the guide head indicate the flush position of a locating surface or reference structure. The flush indicators may employ aprojection, a flag, an LED or an audio module. 一种用于将顶板紧固到屋顶支撑构件和其他结构连接件的安装工具，适于以预先设定的角度驱动螺纹紧固件。该工具优选地包括旋转驱动器组件和伸缩管组件。引导头组件邻近伸缩管组件的外端安装。定位或基准结构用于适当地精确地设定紧固件的驱动角度。安装到引导头的各种指示器指示定位表面或基准结构的齐平位置。齐平指示器可以采用投影、标志、LED或音频模块。