TruDesign® Load Bearing Collars are designed for use with TruDesign® Skin Fittings and Ball Valves. A Load Bearing Collar will allow an assembly of a Skin Fitting - Ball Valve - Tail to withstand a 500 lb. (227 kg) load applied to the Tail (inboard end), for a minimum of 30 seconds - complying with North American ABYC H-27 standards. Compliance to this standard is mandatory for all vessels sold into the United States. These are available in three sizes.
- Award-winning DAME Category Winner 2015 - Marina Equipment, Boatyard Equipment, and Boat Construction Tools & Materials - Marine Equipment Tradeshow (METS) 2015, HISWA ‘Product of the Year’ Nominee 2016 - HISWA Amsterdam Boat Show 2016
- ABYC H-27 compliance for 1/2”, 3/4”, 1”, 1 1/4”, 1 1/4”, & 2” size assemblies - Strength and peace-of-mind. Rates assemblies to withstand a static load of 500 lb (227 kg) at the Tail end for a minimum of 30 seconds
- Compact footprint Designed to work within existing space confinements (is no larger in diameter than the Ball Valve + handle)
- No additional bolts or fasteners through or on to the hull - Unlike flanged seacocks, the TruDesign® Load Bearing Collars work without needing to be fastened to the hull
- Ability to retrofit to existing Skin Fitting - Ball Valve assemblies - Can make any existing TruDesign® Skin Fitting - Ball Valve - Tail assembly compliant to ABYC H-27 simply by removing the Ball Valve, placing the Collar onto the Ball Valve, trimming the Skin Fitting’s thread length (only if necessary), then refitting the Collar & Ball Valve back on to the Skin Fitting
- Compatible with all hull materials across a range of thicknesses - Can be used on aluminium, steel, wood, GRP or composite hulls. Skin Fittings may need to be reduced in length for optimum strength
- Shrouded protection Protects vulnerable areas, such as the exposed thread of the Skin Fitting, from being inadvertently struck by loose items in the hull
- Fool-proof assembly If not installed correctly (e.g. if the Skin Fitting thread has not been reduced to a sufficient length) the Collar will be loose and will be able to move up and down the Ball Valve. When installed correctly, the Collar will be snug and not move
- Manufactured from a glass-reinforced nylon composite - High strength and light weight
- Immune to corrosion and electrolysis Long life with no concerns over decreased performance due to corrosion. No bonding required
The following tables list the minimum, optimal and maximum hull thickness required for each of the different sizes and types of Skin Fitting (Dome headed or Recessed) to comply with ABYC H-27 standards.
- If hull thickness is less than the ‘min.’ value listed, a spacer/packer should be used on the inside of the hull underneath the Skin Fitting Washer and Nut. This should also apply if installed in a position where there is excessive curvature on the hull interior.
- The thread length of a Skin Fitting can be shortened by cutting with a hacksaw or similar tool. Measure the remaining thread length from the top of the Skin Fitting Nut as pictured in the table’s right-hand column and ensure the thread length after cutting falls between the min. and MAX values. Remove any ragged internal edges with a small file.
- At the ‘Optimal’ hull thickness, there will be full thread engagement between the Skin Fitting and Ball Valve. Reducing the Skin Fitting’s thread length will not be required.
- If hull thickness exceeds the ‘MAX.’ value listed, there will be insufficient thread engagement between the Skin Fitting and Ball Valve in order to achieve ABYC H-27 compliance. If possible, use a larger sized TruDesign® Skin Fitting or consider using a TruDesign® Recessed Skin Fitting.