When Coastal metamorphic rock, Franciscan Complex mélange, and fire-weakened hillsides are exposed by highway construction or natural erosion along Highway 1 along Big Sur, PCH through Malibu, I-5 through the Grapevine, and SR-1 near Laguna Beach, the resulting rock faces contain discontinuities — joints, bedding planes, and fracture systems — that define potential failure blocks. Without reinforcement, these blocks will eventually detach.
Access Limited installs rock bolt and anchor systems across California using Spyder Drill Rigs that access near-vertical faces where conventional drill rigs cannot operate.
Fully grouted rock bolts are passive reinforcement elements installed through the failure surface into competent rock behind it. Once grouted, they provide continuous load transfer along their entire length.
Tensioned rock anchors apply active compressive load across open joints and fracture systems — clamping the rock mass together before any movement occurs. These are engineered for large, well-defined failure blocks.
Pattern bolting installs a systematic grid of rock bolts across an entire slope face — reinforcing the overall rock mass rather than targeting individual blocks. This approach is used on highly fractured faces where discrete failure blocks cannot be individually identified.
Rock dowels are untensioned reinforcement elements grouted into the rock mass to provide shear resistance across discontinuities. They are used where passive reinforcement is sufficient and active tensioning is not required.
With an office in Oceano, Access Limited maintains permanent California-based crews ready for rapid deployment.
See why Caltrans, county public works departments, rail operators, utility providers, and federal land agencies trust Access Limited for rock bolting and anchor systems and rockfall mitigation across California.
Access Limited delivers specialized rock bolting and anchor systems across California's rockfall corridors. Complete the form to request an assessment or call our team directly.
