Thern 5PA5 Ensign Series, Owner'S Manual

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Owner's Manual for Thern 5PA5 Ensign Series Portable Davit Cranes page 4
A11577B-0613
Important!
• A qualifi ed professional should
inspect or design the founda-
tion to insure that it will provide
adequate support.
• Locate the crane so it will be vis-
ible during the entire op er a tion.
1.1
Installing the Crane
Do not install the crane in an area defi ned as hazardous by the National Electric
Code, unless installation in such an area has been thoroughly approved.
Do not install the crane near corrosive chemicals, fl ammable materials, ex-
plosives, or other elements that may damage the crane or injure the operator.
Adequately protect the crane and the operator from such elements.
Position the crane so the operator can stand clear of the load, and out of the
path of a broken wire rope that could snap back and cause injury.
Attach the crane to a rigid and level foundation that will support the crane
and its load under all load conditions, including shock loading.
1.1.1
CONSULT APPLICABLE CODES AND REGULATIONS for specifi c
rules on installing the equipment.
1.1.2
LOCATE THE CRANE in an area clear of traffi c and obstacles that could
interfere with operation. Make sure the crane is accessible for maintenance
and operation.
1.1.3
INSTALL THE CRANE on a level surface. An uneven surface may cause
the boom to rotate in the direction the mast is leaning.
1.1.4
FASTEN THE BASE securely to the foundation to withstand applicable
overturning moments and mounting bolt reaction. See Table 1.
a
MAKE SURE mounting holes are secured to a solid foundation able to sup-
port the crane and the load under all conditions with design factors based on
accepted engineering practices.
b
FOR STANDARD PRODUCTS referred to in this manual, use 1/2 - inch
coarse thread fasteners, grade 5 or better. Recommended torque for Grade 5
bolts without lubrication is 75 ft lb. Refer to manufacturer’s instructions for
other fastener types with specifi c torque or installation instructions.
c
NON-STANDARD PRODUCTS that vary from the original design may
have different fastening requirements. Contact a structural engineer or Thern,
Inc. for this information.
TO COMPLY WITH LOCAL CODES, CONTACT A QUALIFIED PROFES-
SIONAL TO OBTAIN PROPER STRUCTURE OR FOUNDATION SPECIFI-
CATIONS FOR THE MOUNTING OF THERN PRODUCTS.
Pedestal Wall-Mount
Base Only Base Only
Crane Mast Suggested Axial Force 2 Axial Force 2 Shear Force
Model Moment 1 Bolt Size Per Bolt Per Bolt Per Bolt
5PA5 9410 in-lb 1/2 inch 880 lb 680 lb 540 lb
1 Mast moment includes the weight of the crane and winch.
2 Force in tension
Table 1 – Crane Reactions