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The Standard Specification for Adhesives
Used in Nonstructural Glued lumber Products (D3110-72), Standard
Specification for Adhesives Used for Finger Joints in Nonstructural
Lumber Products (D5572-95(1999)), and the Standard Specification
for Adhesives Used for Laminated Joints in Nonstructural Lumber
Products(D5791-99) by the American
Society for Testing and Material (ASTM), establishes acceptable
performance levels for adhesives to be used in laminate joints
and finger joints , nonstructural glued lumber products.
Such products include interior and exterior mouldings, window
and door components or parts. In these specifications,
adhesives are classified on the basis of two performance levels,
wet-use and dry-use.
Wet-Use Adhesives-
A wet use nonstructural adhesive is defined as one capable of
producing sufficient bond strength to make the glued lumber
product serviceable under nonstructural use while exposed at
an Equilibrium
Moisture Content (EMC) of 16% or greater and the temperature
may reach as high as 165 degrees Fahrenheit (74 degrees Celsius)
at times during service.
Dry-Use Adhesives-
A dry use nonstructural adhesive is defined as one capable of
developing sufficient strength and durability to make the glued
lumber product serviceable under ordinary conditions of nonstructural
use, when the Equilibrium
Moisture Content (EMC) does not exceed 16% and the temperature
may reach 165 degrees Fahrenheit (74 degrees Celsius) for as
long as 6 hours during shipment or no greater that 140 degree
Fahrenheit (60 degrees Celsius) continuously during service.
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