ICC MASONRY STUDY GUIDE 2026
ACCURATE QUESTION SET AND CORRECT
ANSWERS
◉ Joint reinforcement length can vary by up to how much of or what
percent of the specified length, whichever is less
Answer: The length can vary by up to 1/2 inch or 1% of the specified
length, which ever is less
◉ If used in walls exposed to earth, weather, or relative humidity
above 75%, joint reinforcement must be what type of steel
Answer: The wire must be stainless steel, hot dip galvanized, or
epoxy coated for corrosion protection
◉ Except for walls exposed to earth, weather, or relative humidity
above 75%, all other joint reinforcement must be what type of steel
Answer: Mill galvanized (galvanized during fabrication), hot dip
galvanized (after fabrication), or stainless steel
◉ Prior to the start of masonry construction, the contractor shall
verify that the foundations are constructed within a level alignment
tolerance of
Answer: Plus or minus 1/2"
,◉ Slumped or Adobe textured units have a typical mortar joint
thickness of how much, and with a tolerance of how much.
Answer: Typical half inch mortar joints with a tolerance of plus or
minus 1/4 inch
◉ Web joints are fully mortared in what type of construction
Answer: All courses of piers, columns and pilasters and
When necessary to confine grout or Insulation
◉ A vertical bar may be slightly bent to align with a masonry cell, it
should not be bent more than how much
Answer: 1-inch horizontally per 6 inches of height
◉ The foundation bed joints must be at least how thick if the first
course of the wall is ungrouted or only partially grouted
Answer: 1/4 inch thick and not more than 3/4 inch thick
◉ If the first course of the wall is fully grouted the foundation bed
joint can be up to how thick?
Answer: 1-1/4 inches thick
, ◉ Other joints, both head in bed, are how thick? Unless otherwise
specified.
Answer: 3/8 inches thick
◉ Typical bed joints have a thickness tolerance of how much?
Answer: Plus or minus 1/8"
◉ A bed joint between flashing and masonry has a thickness
tolerance of how much?
Answer: -1/2 inch and +1/8 inch
◉ Head joints have a thickness tolerance of how much?
Answer: +3/8 inch and -1/4 inch
◉ Mortar joints must not protrude more than how far Into a
masonry unit sell that will be grouted.
Answer: 1/2 of an inch
◉ For solid masonry units, both the bed and head joints must be
what?
Answer: Fully mortared
ACCURATE QUESTION SET AND CORRECT
ANSWERS
◉ Joint reinforcement length can vary by up to how much of or what
percent of the specified length, whichever is less
Answer: The length can vary by up to 1/2 inch or 1% of the specified
length, which ever is less
◉ If used in walls exposed to earth, weather, or relative humidity
above 75%, joint reinforcement must be what type of steel
Answer: The wire must be stainless steel, hot dip galvanized, or
epoxy coated for corrosion protection
◉ Except for walls exposed to earth, weather, or relative humidity
above 75%, all other joint reinforcement must be what type of steel
Answer: Mill galvanized (galvanized during fabrication), hot dip
galvanized (after fabrication), or stainless steel
◉ Prior to the start of masonry construction, the contractor shall
verify that the foundations are constructed within a level alignment
tolerance of
Answer: Plus or minus 1/2"
,◉ Slumped or Adobe textured units have a typical mortar joint
thickness of how much, and with a tolerance of how much.
Answer: Typical half inch mortar joints with a tolerance of plus or
minus 1/4 inch
◉ Web joints are fully mortared in what type of construction
Answer: All courses of piers, columns and pilasters and
When necessary to confine grout or Insulation
◉ A vertical bar may be slightly bent to align with a masonry cell, it
should not be bent more than how much
Answer: 1-inch horizontally per 6 inches of height
◉ The foundation bed joints must be at least how thick if the first
course of the wall is ungrouted or only partially grouted
Answer: 1/4 inch thick and not more than 3/4 inch thick
◉ If the first course of the wall is fully grouted the foundation bed
joint can be up to how thick?
Answer: 1-1/4 inches thick
, ◉ Other joints, both head in bed, are how thick? Unless otherwise
specified.
Answer: 3/8 inches thick
◉ Typical bed joints have a thickness tolerance of how much?
Answer: Plus or minus 1/8"
◉ A bed joint between flashing and masonry has a thickness
tolerance of how much?
Answer: -1/2 inch and +1/8 inch
◉ Head joints have a thickness tolerance of how much?
Answer: +3/8 inch and -1/4 inch
◉ Mortar joints must not protrude more than how far Into a
masonry unit sell that will be grouted.
Answer: 1/2 of an inch
◉ For solid masonry units, both the bed and head joints must be
what?
Answer: Fully mortared
