Generic Boat Lift Guide Post Bracket for 1-1/2 in Schedule 40 Pipe — 12in Marine‑Grade 6061 Aluminum with Drain Hole

Heavy-duty marine bracket that secures a 1-1/2" Schedule 40 guide post to dock I-beams while preventing water buildup and corrosion.

This Guide Post Bracket is a purpose-built accessory for boat lifts and docking systems, engineered from marine-grade 6061 aluminum and stainless steel fasteners for long-term exposure to fresh and salt water. CNC-cut for accurate alignment and reinforced with aluminum welds, the bracket accepts a standard 1-1/2" Schedule 40 pipe (1.9" OD) and mounts to common 5"x8" and 6"x10" I-beam flanges. A molded drain hole keeps standing water from corroding inner cavities, extending the service life of the assembly and reducing freeze damage in colder climates. The package includes the bracket, mounting tabs, and all required hardware to streamline installation.

How does this bracket improve docking accuracy and safety?

Installed guide posts help funnel your boat into the correct position, minimizing side impacts and stressful re-alignments. The tall 12" bracket and internal post provide a stable reference point so captains can approach consistently, lowering the risk of hull dings and lift damage.

• 12" height for visible, reliable guidance.
• Rigid, weld-reinforced construction resists bending on contact.
• Secure stainless hardware keeps the assembly tight under load.

Will this fit my existing pipe and I-beam setup?

The bracket is sized specifically for a 1-1/2" Schedule 40 galvanized pipe (1.9" OD) and also accommodates 1-7/8" posts in many applications. It is compatible with the most common I-beam flange dimensions used on residential and commercial boat lifts.

• Inner diameter designed for 1.9" OD pipe (51.5 mm inner diameter tolerance).
• Works with 5"x8" and 6"x10" I-beam flanges without modification.
• Includes mounting tabs and stainless fasteners for a straightforward retrofit.

How does the drain hole and materials selection extend product life?

Water that collects inside tubular fittings is a common source of corrosion and freeze-related cracking. The integrated drain hole routes trapped water away from internal surfaces, while 6061 aluminum and stainless steel hardware resist rust and electrochemical wear in marine environments.

• Drain hole prevents stagnant water and ice buildup inside the bracket.
• 6061 marine-grade aluminum offers high strength-to-weight and corrosion resistance.
• Stainless hardware reduces galvanic corrosion at fastener points.

How simple is the installation and what’s included?

Everything needed for mounting is supplied, so you can replace worn brackets or add new guide posts quickly. The CNC-cut fit and pre-sized mounting tabs reduce alignment fiddling and minimize time on the dock.

• Bracket, mounting tabs, and stainless fasteners included.
• CNC-cut surfaces ensure precise alignment to the beam flange.
• Basic hand tools are sufficient for most installations.

Who is this for? This Guide Post Bracket is aimed at boat owners, marinas, and dock installers who want a durable, low-maintenance guide system for lifting and docking operations. It suits anyone replacing a worn bracket, upgrading for better corrosion resistance, or fitting new guide posts to standard I-beam boat lifts. If you need a robust, easy-to-install bracket that reduces impact damage and resists harsh marine conditions, this accessory is a practical choice.