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Chapter 9 Masonry

hours for grouted masonry, unless the only cement in the grout is Type III portland cement.

SICC-904.2 Hot weather. When either the ambient temperature equals or exceeds 100 °F (38°C), or the ambient temperature equals or exceeds 90°F (32°C) with a wind velocity greater than 8 mph (13 km/h), hot weather construction requirements as specified in NCSBC-Table 1704.5.1 or NCSBC-Table 1704.5.3 and NCSBC-2104.4 shall be implemented.

NCSBC-2104.4 Hot weather construction. The hot weather construction provisions of ACI 530.1/ ASCE6/TMS 602, Article 1.8D, or the following hot-weather procedures shall be implemented when the temperature or the temperature and wind-velocity limits of this section are exceeded.

NCSBC-2104.4.1 Preparation. The following requirements shall be met prior to conducting masonry work.

NCSBC-2104.4.1.1. Temperature. When the ambient temperature exceeds 100 °F (38°C), or exceeds 90°F (32°C) with a wind velocity greater than 8 mph (13 km/h): 1. Necessary conditions and equipment shall be provided to produce mortar having a temperature

below 120°F (49°C). 2. Sand piles shall be maintained in a damp, loose condition.

NCSBC-2104.4.1.2. Special conditions. When the ambient temperature exceeds 115°F (46°C), or 105°F with a wind velocity greater than 8 mph, the requirements of Section 2104.4.1.1 shall be implemented and materials and mixing equipment shall be shaded from direct sunlight.

NCSBC-2104.4.2 Construction. The following requirements shall be met while masonry work is in progress.

NCSBC-2104.4.2.1. Temperature. When the ambient temperature exceeds 100°F (38°C), or exceeds 90°F (32°C) with a wind velocity greater than 8 mph (13 km/h):

  • 1.

    The temperature of mortar and grout shall be maintained below 120°F (49°C).

  • 2.

    Mixers, mortar transport containers and mortar boards shall be flushed with cool water before

they come into contact with mortar ingredients or mortar.

  • 3.

    Mortar consistency shall be maintained by retempering with cool water.

  • 4.

    Mortar shall be used within 2 hours of initial mixing.

NCSBC-2104.4.2.2. Special conditions. When the ambient temperature exceeds 115°F (46°C), or exceeds 105°F (40°C) with a wind velocity greater than 8 mph (13 km/h), the requirements of Section 2104.4.2.1 shall be implemented and cool mixing water shall be used for mortar and grout. The use of ice shall be permitted in the mixing water prior to use. Ice shall not be permitted in the mixing water when added to the other mortar or grout materials.

NCSBC-2104.4.3 Protection. When the mean daily temperature exceeds 100°F (38°C), or exceeds 90°F (32°C) with a wind velocity greater than 8 mph (13 km/h), newly constructed masonry shall be fog sprayed until damp at least three times a day until the masonry is three days old.

SICC-904.3 Temperature records. The SIER shall maintain and submit temperature records with daily inspection reports.

SICC-905 STRUCTURAL TESTING FOR SEISMIC RESISTANCE OF MASONRY CONSTRUCTION

SECTION 1708 1708.1 Masonry. Testing and verification of masonry materials and assemblies prior to construction shall

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