Double BItt，Single Bitt Bollard
Cleat Bollard,Pillar Bollard
Up to 300 Tons,Cast steel, Ductile iron material
Eversafe mooring bollards are precision engineered and manufactured in a variety of metals, including premium grade spheroidal graphite ductile iron ,cast steel and stainless steel to offer super long service life and high level resistance to corrosion and impact.
The shape of Eversafe bollards has been refined with finite element techniques to optimize the geometry and anchor layout. Even at full working load, Eversafe bollards remain highly stable and provide a safe and secure mooring.
High quality Sg iron as standard Strong and durable designs
Very low maintenance
Large line angles possible
Custom made anchors available
Tee Bollard: General purpose applications up to 300 tons, Suitable for steeper rope angles
Horn Bollard: General purpose applications up to 250 tons, suitable for steep rope angles, two lines may share a single bollard
Cleat Bollard: General purpose applications up to 35 tons, suitable for steep rope angles, suitable for small wharves or jetties and marinas
Double Bitt Bollard: General purpose applications up to 200 tons, suitable for mooring multiple lines, concrete filled (optional)
Single Bitt Bollard: General purpose applications up to 200 tons, suitable for steep rope angles, two lines may share a single bollar, concrete filled (optional)
Pillar Bollard (MUSHROOM head): General purpose applications up to 200 tons, suitable for warping operations, 360 degree horizontal line angle use ,can be utilized from all sides of jetty
Eversafe Mooring bollards are offered in Spheroidal graphite cast Iron (Sg Iron), referred to as Ductile cast Iron, because of its superior strength and resistance to corrosion. Ductile cast iron combines the best attributes of grey cast iron and cast steel without the disadvantages.
Grey cast iron is cheaper per unit weight, but the need for thicker wall sections and poor impact strength outweighs this.
Cast steel remains popular due to its high strength and good impact resistance but needs regular painting to prevent corrosion.
To be simple: to achieve same SWL capacity and safety factor, if go with grey cast iron, the bollard will have to be big and heavy; ductile cast iron bollard with get medium size and weight; cast steel bollard will get the small size and ligh weight relatively.
Eversafe Bollards are supplied as factory standard with a protective coating suitable for most projects.
High performance epoxy or other specified paint systems can be applied on request in a choice of colors and thicknesses. Standard available coatings include Primer paint 40 um,surface with 280 um Polyurethane paint or high performance epoxy.
Bitumous coatings (coal tar) are no longer available on Eversafe mooring bollards.
Mooring bollards should be selected and arranged according to local regulations or recognized design standards.
The selection should consider: mooring patterns, draft changes due to loading and discharge, wind and current forces , swell, wave and tidal forces, mooring line types, sizes and angles and ice forces where relevant.
Some of the most commonly used bollard designs today are the T-Head, T-Horn, Kidney, Cleat, Double Bitt, Single Bitt and Pillar.
“Tee Bollard”, “T-bollard”, T- head bollard design has a top shaped like a “T”. Very prominent in many regions of the world due to its simplicity and it gets the job done well up to 300 tonnes. T-head bollards can handle higher line load angels than single bitt and kidney shaped bollards.
Horn Bollards other refer it to as the “Staghorn design” as well can accommodate very steep mooring angles.
Kidney-shaped Bollard has a simple design that is suitable for low to medium tidal range. Kidney shaped bollards offer an economical solution for installations where securing of mooring lines at high angles is not a concern. Not recommended when multiple mooring lines will share one bollard due to the shallow lip at the top of the bollard.
Cleats Bollards are simple type of bollards used for smaller vessels. With a mooring line capacity range from 5 tonnes to 35 tonnes, Cleat Bollards suit marine mooring applications for light commercial use or recreational marina use as well as mounting on vessels.
Double Bitt Bollard, some call it the “Twin Horn” or “Twin” is space-saving for small areas. Double Bitt bollards are useful when high densities of mooring lines are present, this is a better choice for ship mooring and shifting.
Single Bitt Bollard also known as “US Style Pillar Bollards” are particularly suitable for applications where tidal range variations are large and can handle steep mooring line angles.
They are capable of accepting multiple mooring lines and have been designed to fit onto existing bolt patterns for older US style pillar bollards.
Pillar Bollards are normally applicable where tidal ranges are small and use for warping operations along berths where vessels need to be re-positioned for loading purposes.
Due to their 360 degree line of load range, they can also be placed on jetties where vessels berth on both sides of the jetty structure. Pillar Bollards can withstand use in harsh
Mooring loads should be calculated where possible, but in the absence of information then the following table can be used as an approximate guideline.
Vessel Displacement Suggested bollards rating
Up to 2,000 tons 10 tons
2,000–10,000 tons 30 tons
10,000–20,000 tons 60 tons
20,000–50,000 tons 80 tons
50,000–100,000 tons 100 tons
100,000–200,000 tons 150 tons
over 200,000 tons 200 tons
Where strong winds, currents or other adverse loads are expected, bollard capacity should be increased by 25% or more.