All Weather Masonry Construction
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International Building Code 2006
Chapter 21: Masonry
Section 2104 – Construction
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ACI 530.1/ASCE 6/TMS 602
IBC 2104.1MASONRY CONSTRUCTION
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Hot and Cold Weather Masonry Construction
Hot and Cold Weather Masonry Construction
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MSJC 530.1 – 1.8 CCOLD WEATHER CONSTRUCTION
• Ambient temperature below 40°F
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MSJC 530.1 – 1.8 CCOLD WEATHER CONSTRUCTION
• Ambient temperature is the outdoor temperature at the time considered.
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MSJC 530.1 – 1.8 CCOLD WEATHER CONSTRUCTION
Ambient Temperature
CONSTRUCTION • 40°F – 32°F• 32°F – 25°F• 25°F – 20°F• 20°F and below
PROTECTION• 40°F – 25°F• 25°F – 20°F• 20°F and below
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• Do not lay glass units
MSJC 530.1 – 1.8 C.1COLD WEATHER CONSTRUCTION
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• Units not less than 20°F
• Units shall not contain frozen moisture
• No visible ice or snow on surface
MSJC 530.1 – 1.8 C.2.aPREPARATION
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MSJC 530.1 – 1.8 C.2.bPREPARATION
• Remove visible ice or snow from surface to receive new construction
• Heat surfaces to above freezing
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MSJC 530.1 – 1.8 C.3CONSTRUCTION
• Work in progress
• Based on ambient air temperature
• Water and aggregates not to exceed 140°F for mortar and grout
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MSJC 530.1 – 1.8 C.3.aCONSTRUCTION
Temperatures 40°F – 32°F(based on ambient temperature)
• Mortar temperature 40°F – 120°F at time of mixing
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MSJC 530.1 – 1.8 C.3.aCONSTRUCTION
Temperatures 40°F – 32°F(based on ambient temperature)
• Heat water and aggregates for grout when < 32°F
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MSJC 530.1 – 1.8 C.3.bCONSTRUCTION
Temperatures 32°F – 25°F(based on ambient temperature)
• Mortar temperature 40°F – 120°F at time of mixing
• Maintain mortar temperature above freezing until used
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MSJC 530.1 – 1.8 C.3.bCONSTRUCTION
Temperatures 32°F – 25°F(based on ambient temperature)
• Heat water and aggregates so that grout temperature 70°F – 120°F at time of mixing
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MSJC 530.1 – 1.8 C.3.bCONSTRUCTION
Temperatures 32°F – 25°F(based on ambient temperature)
• Maintain grout temperature > 70°F until placement
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MSJC 530.1 – 1.8 C.3.bCONSTRUCTION
Temperatures 32°F – 25°F(based on ambient temperature)
• Heat AAC units to a minimum 40°F before installation
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MSJC 530.1 – 1.8 C.3.cCONSTRUCTION
Temperatures 25°F – 20°F(based on ambient temperature)
• Article 1.8 C.3.b
• Heat masonry surfaces to 40°F
• Heat masonry to minimum 40°F prior to grouting
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MSJC 530.1 – 1.8 C.3.cCONSTRUCTION
Temperatures 25°F – 20°F(based on ambient temperature)
• Wind breaks or enclosures when wind velocity > 15 mph
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MSJC 530.1 – 1.8 C.3.cCONSTRUCTION
Temperatures below 20°F(based on ambient temperature)
• Article 1.8 C.3.c
• Maintain air temperature > 32°F using enclosures and auxiliary heat
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MSJC 530.1 – 1.8 C.4PROTECTION
• Apply after masonry is placed
• Based on anticipated minimum daily temperature for grouted masonry
• Based on anticipated mean daily temperature for ungrouted masonry
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MSJC 530.1 – 1.8 C.4.aPROTECTION
• Maintain glass masonry > 40°F for 48 hours after construction
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MSJC 530.1 – 1.8 C.4.bPROTECTION
• Maintain AAC masonry > 32°F for 4 hours after thin-bed application
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MSJC 530.1 – 1.8 C.4.cPROTECTION
Temperatures 40°F – 25°F
• Weather-resistive membrane for 24 hours
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MSJC 530.1 – 1.8 C.4.dPROTECTION
Temperatures 25°F – 20°F
• Completely cover with weather-resistive insulating blankets or equal for 24 hours
• 48 hours for grouted masonry, unless Type III portland cement
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MSJC 530.1 – 1.8 C.4.ePROTECTION
Temperatures 20°F and below
• Maintain above 32°F for 24 hours using heated enclosures, electric heating blankets, infrared lamps or other acceptable method
• 48 hours for grouted masonry, unless Type III portland cement
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MSJC 530.1 – 1.8 DHOT WEATHER CONSTRUCTION
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MSJC 530.1 – 1.8 D.1.aPREPARATION
Ambient temperature > 100°F or > 90°F w/wind > 8 mph
• Mortar temperature < 120°F
• Loose, damp sand
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MSJC 530.1 – 1.8 D.1.bPREPARATION
Ambient temperature > 115°F or > 105°F w/wind > 8 mph
• Article 1.8 D.1.a
• Shade materials and mixing equipment
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MSJC 530.1 – 1.8 D.2.aCONSTRUCTION
Ambient temperature > 100°For > 90°F w/wind > 8 mph
• Mortar and grout < 120°F
• Mixers, transport containers and mortar boards shall be flushed with cool water
• Spread no more than 4 ft of mortar ahead for AAC units
• Set AAC units within one minute
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MSJC 530.1 – 1.8 D.2.aCONSTRUCTION
Ambient temperature > 100°For > 90°F w/wind > 8 mph
• Retemper with cool water
• Use mortar within 2 hours
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MSJC 530.1 – 1.8 D.2.bCONSTRUCTION
Ambient temperature > 115°F or > 105°F w/wind > 8 mph
• Article 1.8 D.2.b
• Use cool mixing water
• No ice in mixing water when added to other materials
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MSJC 530.1 – 1.8 D.3PROTECTION
Ambient temperature > 100°For > 90°F w/wind > 8 mph
• Fog spray new construction until damp three times a day for three days