Rack Layout and Design
The design of
a dry stack system is essential to creating an efficient
operation. We design our rack systems in accordance with
AISC (American Institute of Steel Construction) specifications
and local building codes. All of our rack components are
manufactured from hot-rolled structural steel and all fasteners
are high strength galvanized bolts and nuts.
There are three basic criteria to consider in
the design of any boat storage system - Unit, Area, and Method.
Unit - This refers to the boats to be stored.
The size factors of boat weight, length, width, and height
(profile) form the basis for ensuring sufficient capacity and
Area - This is the space available for the rack
or building structure. This takes into account several items,
including the following:
- Square footage - necessary space to store the desired
number of boats
- Lot coverage - land usage/code restrictions; storm water
management system usually crucial because of proximity to
body of water
- Accessibility to bulkhead - directly affects the speed
and efficiency of the launch/retrieval operation
- Aisle allowance - provide ample room for movement of the
boats in and out of the system
- Topography - level or sloping ground; may necessitate retaining
walls or steeped foundations; flood plains may require minor
flow-through at base level
- Soil conditions - can affect the building, bulkhead and
Method - This relates to the type of handling equipment to be used in the system. There are two standard methods of handling boats in a dry stack operation - the marina forklift and cranes.
- Marina forklifts are the most predominant and versatile
handling equipment in dry stack operations. www.ibeglobal.com These
forklifts are heavy duty machines with extended forks and
special masts. They are generally capable of lifting
boats to three, four, and five levels high, while also
being able to launch or retrieve boats by lowering the
mast below the bulkhead (negative lift). The features which
directly affect proper design of the dry stack are the
lifting capacity, turning radius, overall mast height at
full extension, and mast height when traveling.
Lazy Days Marina
- Stacker cranes have become a
viable, although expensive, alternative to forklifts in dry
They offer some advantages to those customers willing to
pay the heavy price tag. A crane is capable of higher density
storage, up to nine or ten levels high. The crane's lifting
capacity does not decrease at the upper elevations. Crane
offers good visibility as the operator in the cab of the
crane is at the same level as the boat being handled. It
is electrically powered eliminating diesel fumes and noise.
The cab and forks can rotate 360 degrees. Lastly, the crane
does not require as wide an aisle to handle boats, thereby
saving valuable space.
Courtesy of Lamb's Yacht Center,
A revolutionary new concept in dry stack storage is the Maff-Stack
system. www.maffetts.com The
Maffett System utilizes an overhead bridge crane and cradle
assembly to lift the
boat from the water and transport it to the storage facility.
This system is highly adaptable, is cost competitive, and
addresses the problem of vertical limitation restrictions.
This new concept requires 20% less building space or "building