Klou oto-foraj (tip SDA)

Self-drilling nails, wey dem commonly designate as SDA type fasteners, na specialized ground reinforcement solution inside soil nailing discipline. Dese threaded steel elements function as integrated drilling and anchoring systems, combining hollow core design with integral cutting or grinding functionality at tip. Unlike traditional nails wey require pre-drilled holes, self-drilling nails eliminate need for separate drill equipment, significantly accelerating installation timelines in challenging soil conditions. SDA designation usually refer to nails wey dem engineer with helical or fluted patterns wey simultaneously advance through soil media while creating positive bearing against surrounding ground matrix. Dis dual functionality make self-drilling nails particularly valuable in applications where ground stability dey compromise, whether through excavation, slope failure risk, or underground construction phases. Self-drilling technology inherently provide superior load transfer characteristics compared to conventional installation methods, as mechanical interlock between nail geometry and soil structure dey establish instantaneously as drilling occur.