Marine Double Bollard, also known as Double Bitt Boat Bollard.
GBT 554-2008 specifies the requirements for Type C marine double bollards, which consist of two cylindrical horns mounted on a common base plate to secure larger vessels to docks with higher load-bearing capacity.
Constructed from cast steel or ductile iron, these bollards must withstand a minimum breaking load of 100 tons, rotate freely on their base, and prevent damage to mooring lines.
The series includes five variants: Type A (ordinary), Type B (embedded), Type C (simple), Type DL (double cross screw-fixed), and Type DH (double cross weld-fixed), each with different nominal diameters.
All bollards comply with the national standard and carry China Classification Society certification, with customized solutions available upon request.
Brand | LGRIG® |
Material | Steel Plate |
Standard | GBT554-2008 Type C |
Style | Marine Double Bollard |

Part No. | Nominal Dia. | Max. Breaking Load (KN) | A | b | B | D | D1 | h | h1 | H | L | r | t | Weight (kg) |
LGDB55408C050 | 50 | 13 | 180 | 32 | 100 | 50 | 65 | 9 | 26 | 115 | 310 | 20 | 6 | 4.5 |
LGDB55408C075 | 75 | 18 | 275 | 50 | 125 | 75 | 95 | 12 | 43 | 170 | 430 | 20 | 7 | 10.8 |
LGDB55408C100 | 100 | 25 | 350 | 65 | 160 | 100 | 120 | 14 | 51 | 220 | 540 | 25 | 7 | 18.6 |
LGDB55408C125 | 125 | 34 | 430 | 80 | 200 | 125 | 145 | 15 | 60 | 275 | 676 | 28 | 9 | 34.3 |
LGDB55408C150 | 150 | 43 | 500 | 100 | 230 | 150 | 170 | 16 | 70 | 330 | 800 | 35 | 9 | 49.0 |