Polymer grid for supplemental roof and rib support of combustibl
Polymeric retaining wall building block
Portable safety trench and pit form system
Portal frame for trench box stack
Powered support frame for large seam thicknesses with...
Pre-cast panel lifting insert
Pre-cast retaining wall system and method
Pre-cast, reinforced concrete retaining wall system
Pre-stressed modular retaining wall system and method
Pre-stressed modular retaining wall system and method
Precast concrete retaining wall
Precast cribbing wall system
Prefabricated panel for the construction of directed fragility w
Preload headboard for an elongate prop
Prestressed component retaining wall system
Prestressing of mine props
Process and apparatus for applying pile planking
Process and arrangement for the support of underground cavity sy
Process for guiding the excavation tool used for the constructio
Process for holding up the lateral walls of deep ditches