All Weather Masonry Construction

2 International Building Code 2006 Chapter 21: Masonry Section 2104 – Construction

3 ACI 530.1/ASCE 6/TMS 602 IBC MASONRY CONSTRUCTION

4 Hot and Cold Weather Masonry Construction

5 MSJC – 1.8 C COLD WEATHER CONSTRUCTION Ambient temperature below 40°F

6 MSJC – 1.8 C COLD WEATHER CONSTRUCTION Ambient temperature is the outdoor temperature at the time considered.

7 MSJC – 1.8 C COLD 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

8 Do not lay glass units MSJC – 1.8 C.1 COLD WEATHER CONSTRUCTION

9 Units not less than 20°F Units shall not contain frozen moisture No visible ice or snow on surface MSJC – 1.8 C.2.a PREPARATION

10 MSJC – 1.8 C.2.b PREPARATION Remove visible ice or snow from surface to receive new construction Heat surfaces to above freezing

11 MSJC – 1.8 C.3 CONSTRUCTION Work in progress Based on ambient air temperature Water and aggregates not to exceed 140°F for mortar and grout

12 MSJC – 1.8 C.3.a CONSTRUCTION Temperatures 40°F – 32°F (based on ambient temperature) Mortar temperature 40°F – 120°F at time of mixing

13 MSJC – 1.8 C.3.a CONSTRUCTION Temperatures 40°F – 32°F (based on ambient temperature) Heat water and aggregates for grout when < 32°F

14 MSJC – 1.8 C.3.b CONSTRUCTION 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

15 MSJC – 1.8 C.3.b CONSTRUCTION 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

16 MSJC – 1.8 C.3.b CONSTRUCTION Temperatures 32°F – 25°F (based on ambient temperature) Maintain grout temperature > 70°F until placement

17 MSJC – 1.8 C.3.b CONSTRUCTION Temperatures 32°F – 25°F (based on ambient temperature) Heat AAC units to a minimum 40°F before installation

18 MSJC – 1.8 C.3.c CONSTRUCTION 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

19 MSJC – 1.8 C.3.c CONSTRUCTION Temperatures 25°F – 20°F (based on ambient temperature) Wind breaks or enclosures when wind velocity > 15 mph

20 MSJC – 1.8 C.3.c CONSTRUCTION Temperatures below 20°F (based on ambient temperature) Article 1.8 C.3.c Maintain air temperature > 32°F using enclosures and auxiliary heat

21 MSJC – 1.8 C.4 PROTECTION Apply after masonry is placed Based on anticipated minimum daily temperature for grouted masonry Based on anticipated mean daily temperature for ungrouted masonry

22 MSJC – 1.8 C.4.a PROTECTION Maintain glass masonry > 40°F for 48 hours after construction

23 MSJC – 1.8 C.4.b PROTECTION Maintain AAC masonry > 32°F for 4 hours after thin-bed application

24 MSJC – 1.8 C.4.c PROTECTION Temperatures 40°F – 25°F Weather-resistive membrane for 24 hours

25 MSJC – 1.8 C.4.d PROTECTION 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

26 MSJC – 1.8 C.4.e PROTECTION 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

27 MSJC – 1.8 D HOT WEATHER CONSTRUCTION

28 MSJC – 1.8 D.1.a PREPARATION Ambient temperature > 100°F or > 90°F w/wind > 8 mph Mortar temperature < 120°F Loose, damp sand

29 MSJC – 1.8 D.1.b PREPARATION Ambient temperature > 115°F or > 105°F w/wind > 8 mph Article 1.8 D.1.a Shade materials and mixing equipment

30 MSJC – 1.8 D.2.a CONSTRUCTION Ambient temperature > 100°F or > 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

31 MSJC – 1.8 D.2.a CONSTRUCTION Ambient temperature > 100°F or > 90°F w/wind > 8 mph Retemper with cool water Use mortar within 2 hours

32 MSJC – 1.8 D.2.b CONSTRUCTION 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

33 MSJC – 1.8 D.3 PROTECTION Ambient temperature > 100°F or > 90°F w/wind > 8 mph Fog spray new construction until damp three times a day for three days