Specifications for Bollards Concrete minimum strength 5000psi @ 28days 8 inch Diameter Galvanized Sch40 steel pipe 10 FT long filled with concrete. Set in a 5 ft 8 inch 24 inch Diameter concrete base. Base will have 8 foot concrete on bottom for pipe support. Total length will be 10 Ft 8 inch bollard. Two rebar lifting lug will be set in top of concrete base for setting bollards. Specifications for Thrust Blocks Concrete minimum strength 5000psi @ 28 days Block will be 1Ft 6 inch X 1 Ft 6 inch square Type R anchor lifting lug will installed for set thrust block.