VetPro DC Installation/Service Manual, 00-02-1606, Revision R01
3
When using lag screws as the method of attachment, it is imperative to consider
the full scope of the task. Several factors must be considered for safe, permanent
installations. Some of the key issues are:
• Lumber commonly used in construction projects can be different from
location to location.
• The grade, age, position, and overall condition can vary greatly.
• The attachment stud may have additional, hidden loads.
• The location of the pilot hole with respect to the center of the stud will
affect the load bearing ability.
• The size of the pilot hole required for the lag screw will be different based
on the grade, age and condition of the lumber.
• Never over-tighten the lag screw as this will weaken the mechanical
connection.
• Lumber with splits or cracks should not be used for attachment.
•
Plywood, particle board, or similar construction materials, should not
be used for attachment.
• Consider lumber dryness or moisture when attaching to exterior framing
studs.
• Midmark mechanical designs will exert up to 920 pounds (418 kilograms)
of loading on the supporting structure.
• Midmark provides fasteners for average installations. Based on specific
installation conditions, it may be necessary to choose an alternate
fastener or fastening methods.
• If the surface of the Installation Guide falls below the surface of the wall, a
correspondingly longer fastener must be chosen.
• Seek the advice of a professional structural engineer to clarify any issues
before the installation.
• Inspect the attachment method 30 days after the installation and, every 6
months thereafter.
• Lag screws are not intended to be used as an attachment method for
metal supports such as those found in center island pass-through
cabinets. Midmark provides machine screws, large flat washers and
nylock nuts to use when fastening the system to metal supports.
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