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Building Foundations - Concrete Masonry Units
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Building Foundations for Concrete Masonry Units are similar to foundations for the standard framed walls with one exception. The rebar for the masonry extends from the foundation to accept the masonry which ties the two together. Foundation and rebar layout is critical to the overall layout of the building.
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Quick Facts
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Material Type: Reinforcing steel, minimum 3000 psi concrete
Keys to Watch for: Accurate layout of foundation sizes, clean digging of foundations, accurate rebar placement, accurate layout of anchor bolts for structural steel, removal of footing spoils
Safety Issues: Flagging for excavation of foundations, caps for rebar extending from foundation,
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Technical Information - Foundation Excavation and Reinforcing Steel
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1&2) Layout of foundations starts with staking and then the installation of batter boards. The batter boards protect the staking and allow a point to pull strings to line out footings 3&4) The foundations are then chalked tor painted to allow for excavation by a backhoe. A grade checker confirms the depth of footing with a laser and laser eye. 5&6) Foundations are complete and excavated ready for reinforcing steel 7)Rebar templates are installed in the foundations to provide a means for installing and supporting the rebar in place until pouring concrete 8&9)Rebar is delivered and stockpiled at the site prior to installation. There are tags on each of the bundles identifying where they are to be placed. 10, 11, 12) Rebar is installed in the foundations 13, 14, 15) Rebar installed in place prior to concrete pour 13 shows a break in the CMU dowels for a doorway.
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Technical Information - Spread Footings and Anchor Bolts
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Technical Information - Pouring and Finishing foundations
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Production Information
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Disclaimer: All information provided on constructionreference.com is provided for information purposes only. The information included is not intended as legal advice and does not represent advice with regard to specific practices or undertakings and construction reference.com shall not be responsible for any damages of any kind including direct, indirect, incidental, special or consequential damages that may arise out of or result from reliance on the information provided on this web site.
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