Specifications include, but are not limited to: Perform Masonry Repairs & Repointing ; There are no cafeteria or restroom facilities available to the Contractor or employees. Any electric power that may be needed will be furnished by the County for small tools and equipment. All connections to the electrical system if applicable will be furnished by the Contractor and must comply with OSHA Regulations. Any temporary lights necessary to perform the work shall be furnished by the Contractor. Because other activities taking place in County buildings at the same time the work covered by this specification is going on, the Contractor shall cooperate with the County’s Representative to ensure that all contract work progresses in such a manner, which does not conflict with the daily operations of the staff. 1. All masonry restoration work including cleaning and masonry repair shall be performed only when air temperature is between 40- and 90-degrees F and is predicted to remain so for at least 7 days after completion of work. Retain, on site, a log of surface and ambient temperatures. 2. When temperature is below requirements, operation shall be conducted on a day-to-day basis when authorized by the County. Proceed only when the Contractor is willing to guarantee the work as required and without additional reservations and restrictions. 3. Do not mix or apply mortar to outside surfaces during rain or when surfaces contain standing water. 4. Protect masonry from freezing for 3 days or until mortar is thoroughly dry and hardened. 5. Cold weather requirements. a. Cold weather, as referred to in this Section, is four hours with ambient temperatures below 40 degrees F in a 24-hour period. Do not lay masonry in cold weather unless authorized by the County. b. Heat mixing water and sand as required during cold weather to produce mortar temperatures at application of between 70 to 120 degrees F. c. Heat masonry units to 40 degrees F minimum when ambient temperature is below 20 degrees F. d. Provide windbreaks during construction if ambient temperature is 35 degrees F or below and wind velocities exceed 15 mph. e. If ambient temperatures are 20 degrees F or below, provide enclosure for masonry under construction with heat sources and maintain temperature in enclosure at 40 degrees F min. during work and for 7 days after work is complete. f. Keep materials free of ice and snow. Do not lay masonry on frozen material.
