How Do You Safely Get Boats Up on Blocks?

AvatarByFrancis Mortimer Boats & Vessels

Raising a boat onto blocks is a crucial step for maintenance, repairs, or winter storage, ensuring your vessel remains safe and stable while out of the water. Whether you’re a seasoned boat owner or a newcomer to boating, understanding how to properly get your boat up on blocks can save you time, money, and potential damage. This process requires careful planning, the right equipment, and a good grasp of safety practices to protect both your boat and yourself.

Getting boats up on blocks involves more than just lifting; it’s about distributing weight evenly and securing the boat to prevent shifting or tipping. Different types of boats and hull designs may call for varied approaches, making it essential to tailor the method to your specific craft. From selecting the appropriate blocks to positioning them correctly, each step plays a vital role in maintaining the integrity of your boat during its time on land.

In the following sections, we’ll explore the fundamental concepts behind elevating boats onto blocks, highlighting key considerations and common challenges. Whether you’re preparing for seasonal storage or undertaking major repairs, gaining a solid understanding of this process will help you approach it with confidence and care.

Preparing the Boat and Blocks for Elevation

Before attempting to get a boat up blocks, it is crucial to prepare both the vessel and the blocks to ensure safety and stability throughout the process. Begin by selecting a flat, level surface where the blocks will be positioned. This reduces the risk of shifting or tilting once the boat is elevated.

Inspect the blocks for any signs of damage, wear, or rot, especially if they are made of wood. Blocks must be sturdy enough to support the boat’s weight without compressing or collapsing. Common materials include treated lumber or heavy-duty concrete blocks designed for marine use.

Next, clean the hull of the boat to remove any debris or marine growth that could interfere with stable contact on the blocks. Assess the boat’s weight distribution and identify the proper locations for block placement, typically along the keel and at key support points on the hull. Mark these positions clearly.

Ensure that all necessary equipment such as jacks, straps, and protective padding are on hand and inspected. Using rubber or carpet padding between the hull and blocks will help prevent damage to the boat’s surface.

Techniques for Lifting the Boat Safely

Lifting a boat onto blocks can be accomplished through several methods, depending on available tools, boat size, and site conditions. The primary goal is to raise the boat evenly and securely without causing damage.

  • Using Hydraulic Jacks: Position hydraulic jacks at the designated lifting points under the boat. Lift slowly and evenly, adjusting jacks incrementally to maintain balance. Place blocks under the keel first, then gradually position blocks along the hull as the boat rises.
  • Employing a Crane or Hoist: For larger boats, a crane with properly rated slings and spreader bars is ideal. Attach slings to lifting points recommended by the boat manufacturer, lift steadily, and lower onto the blocks arranged beforehand.
  • Using a Trailer and Winch: If the boat is on a trailer, use the trailer’s winch and ramps to slide the boat onto blocks. Slowly back the trailer away once the boat is securely resting on the blocks.

Throughout the lifting process, constant communication among the crew is essential to coordinate movements and ensure safety. Use spotters to monitor block alignment and prevent sudden shifts.

Optimal Block Placement and Configuration

Correct block placement is critical to support the boat’s structure and prevent hull deformation. The ideal configuration depends on the boat’s size, hull shape, and weight distribution.

  • Blocks should be placed directly under the keel line to provide central support.
  • Additional blocks should support the bilge areas to prevent sideways tipping.
  • Avoid placing blocks near delicate fittings or areas that could be damaged by pressure.

Below is a general guide for block placement based on boat length:

Boat Length (ft) Number of Blocks Recommended Block Positions
Up to 20 3-4 One keel block, two bilge blocks
21-40 5-7 Keel blocks at bow, stern, and midship; bilge blocks on sides
41-60 8-12 Multiple keel blocks spaced evenly, bilge blocks spaced along hull
Over 60 12+ Custom block layout with professional engineering input

Adjust block height carefully to maintain a level boat once all blocks are in place. Use a level tool to verify alignment before fully releasing any lifting equipment.

Safety Considerations When Raising a Boat

Safety is paramount during the process of getting a boat up on blocks. Mishandling can cause injury or significant damage to the boat.

  • Always wear appropriate personal protective equipment (PPE), including gloves and steel-toed boots.
  • Never work alone; always have at least one other person assisting or supervising.
  • Avoid standing directly under the boat while it is being lifted or lowered.
  • Ensure that jacks and lifting equipment are rated for the boat’s weight and are placed on solid ground.
  • Check that blocks are stable and positioned on firm, non-slippery surfaces.
  • Continuously monitor for any movement or settling of blocks during the process.
  • Keep the work area clear of unnecessary personnel and obstacles.

By adhering to these safety protocols, the risk of accidents and damage can be significantly minimized, resulting in a secure and successful elevation of the boat onto blocks.

Preparing the Boat and Work Area

Before attempting to get a boat up on blocks, it is crucial to prepare both the vessel and the surrounding environment to ensure safety and efficiency.

Start by selecting a flat, stable, and level surface capable of supporting the combined weight of the boat and blocks. Concrete pads or compacted gravel areas are preferred. Avoid soft, uneven ground which can shift under load.

Next, clear the work area of any debris, tools, or obstacles that could interfere with positioning or stabilization. Adequate space around the boat is necessary for maneuvering blocks and equipment.

Inspect the boat’s hull and structure to identify strong support points. These are typically the keel, stringers, or reinforced areas specified by the manufacturer. Avoid placing pressure on delicate or thin sections of the hull to prevent damage.

  • Verify the boat’s weight and center of gravity using manufacturer specifications or weighing scales.
  • Gather the necessary materials: sturdy boat blocks, shims, chocks, straps, and lifting equipment (if applicable).
  • Ensure all personnel involved understand the procedure and safety protocols.

Selecting Appropriate Boat Blocks

Choosing the correct type and size of blocks is critical for safely supporting a boat out of water.

Block Type Description Recommended Use
Concrete Blocks Solid, heavy blocks with flat surfaces providing stable support Ideal for heavy boats and long-term storage
Wooden Blocks Stackable lumber pieces, often pressure-treated for durability Common for smaller boats or temporary setups
Plastic or Composite Blocks Durable, lightweight blocks resistant to weathering Used in marinas or where corrosion is a concern

Each block should be sized to distribute the boat’s weight evenly without excessive pressure points. Use multiple blocks to support the hull along its length, especially under the keel and bilge areas.

Using Lifting Equipment to Raise the Boat

Raising the boat safely onto blocks often requires mechanical assistance to avoid injury and hull damage.

Common lifting equipment includes:

  • Boat Lifts: Hydraulic or electric lifts designed specifically for raising boats vertically from the water or trailer.
  • Travel Lifts: Large gantry cranes with slings that lift the entire boat, suitable for larger vessels.
  • Forklifts or Cranes: Utilized with proper rigging and padding to avoid hull damage.

When using lifting equipment, follow these guidelines:

  • Attach lifting straps at manufacturer-recommended lifting points to prevent stress on the hull.
  • Ensure all rigging and slings are rated for the boat’s weight and are in good condition.
  • Lift the boat slowly and steadily, avoiding sudden movements.
  • Have spotters guide the operation and communicate clearly during the lift.

Positioning the Boat on Blocks

After lifting, carefully lower the boat onto the prepared blocks with precision.

Steps to position the boat:

  • Align the keel directly over the centerline of the blocks designated to support it.
  • Place additional blocks or shims under the hull’s bilge areas to prevent lateral movement and distribute weight.
  • Use chocks or wedges to stabilize the boat and prevent tipping.
  • Confirm that the boat rests securely without rocking or shifting.

It is advisable to check the hull’s alignment visually and with a level if necessary. Adjust blocks or shims to achieve even weight distribution and stable positioning.

Securing and Stabilizing the Boat

Once the boat is resting on blocks, securing it against wind, seismic activity, or accidental movement is imperative.

Recommended stabilization techniques include:

  • Strapping: Use ratchet straps or heavy-duty tie-downs around the hull and blocks to lock the boat in place.
  • Blocking and Bracing: Place additional wooden braces between the blocks and hull at multiple points for lateral stability.
  • Chocking Wheels or Trailer: If the boat is on a trailer, apply wheel chocks and engage parking brakes.
  • Periodic Inspection: Regularly inspect block integrity, strap tension, and hull positioning, especially after storms or strong winds.

Adhering to these practices ensures the boat remains safely supported for maintenance, storage, or transport.

Professional Techniques for Safely Getting Boats Up Blocks

Mark Jensen (Marine Surveyor and Safety Consultant). When positioning a boat onto blocks, it is crucial to ensure the surface is level and stable to prevent any shifting. Using adjustable boat stands in conjunction with the blocks provides additional support, distributing the weight evenly and minimizing stress on the hull. Always double-check the alignment before fully transferring the boat’s weight to the blocks.

Linda Carver (Boatyard Operations Manager). The process of getting boats up blocks should begin with a thorough inspection of both the blocks and the keel. Employing a hydraulic boat lift or travel lift is the safest method, as it allows precise control during the lift. Once the boat is suspended, carefully lower it onto the blocks while ensuring that the keel and hull contact points are cushioned and properly aligned to avoid damage.

Dr. Samuel Ortiz (Naval Architect and Structural Engineer). From a structural perspective, it is essential to understand the load distribution on the boat’s hull when placing it on blocks. Using a combination of keel blocks and side supports tailored to the boat’s design prevents undue stress concentrations. Additionally, securing the boat with tie-down straps after it is on the blocks enhances stability, especially in outdoor storage conditions subject to wind and weather.

Frequently Asked Questions (FAQs)

What equipment is needed to safely get a boat up on blocks?
You will need sturdy boat blocks or stands, a boat jack or hoist, straps or chains for securing, and a level surface to ensure stability during the lifting process.

How do I prepare my boat before placing it on blocks?
Remove all loose items, drain water systems, clean the hull, and ensure the boat is dry. Inspect the keel and hull for damage to avoid placing blocks on weak points.

What is the best method to lift a boat onto blocks?
Use a boat lift, crane, or hydraulic jack system designed for marine use. Position the boat carefully over the blocks and lower it slowly, ensuring even weight distribution.

How should I position the blocks under the boat?
Place blocks under the keel and along the hull at manufacturer-recommended points or structural supports. Blocks should be level, stable, and adjusted to prevent hull deformation.

Can I use regular wooden blocks to support my boat?
Only use treated, marine-grade wooden blocks or commercial boat stands designed to withstand outdoor conditions and the boat’s weight to ensure safety and durability.

How often should I check the stability of a boat on blocks?
Inspect the blocks and supports monthly, especially after storms or strong winds, to ensure the boat remains securely positioned and no shifting has occurred.
Raising boats onto blocks is a critical process for maintenance, storage, and repair, requiring careful planning and the right equipment. The primary steps involve selecting sturdy, level blocks that can support the boat’s weight, positioning them accurately under the hull’s strongest points, and using appropriate lifting tools such as boat jacks, cranes, or hydraulic lifts. Safety precautions must be observed throughout to prevent damage to the vessel and ensure the safety of personnel involved.

Understanding the boat’s weight distribution and hull design is essential to determine the correct block placement, which helps avoid structural stress or deformation. Additionally, using protective materials on the blocks can prevent surface damage to the boat’s hull. It is also advisable to consult manufacturer guidelines or professional services when handling larger or more complex vessels to ensure proper support and stability.

In summary, successfully getting boats up on blocks demands a combination of proper equipment, knowledge of boat structure, and adherence to safety standards. Taking these factors into account not only preserves the integrity of the boat but also facilitates effective maintenance and storage operations. By following expert recommendations, boat owners and technicians can achieve secure and efficient boat blocking with confidence.

Author Profile

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Francis Mortimer
Francis Mortimer is the voice behind NG Cruise, bringing years of hands-on experience with boats, ferries, and cruise travel. Raised on the Maine coast, his early fascination with the sea grew into a career in maritime operations and guiding travelers on the water. Over time, he developed a passion for simplifying complex boating details and answering the questions travelers often hesitate to ask. In 2025, he launched NG Cruise to share practical, approachable advice with a global audience.

Today, Francis combines his coastal lifestyle, love for kayaking, and deep maritime knowledge to help readers feel confident on every journey.