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    • Method Of Statement For Marble Stone Installation

    Method Of Statement For Marble Stone Installation

    • Posted by Hany Ismail, MSC, PMP
    • Categories Project Management
    • Date September 30, 2014
    • Comments 0 comment

    Summary:     This Method of Statement applies to the following;

    1. Marble Flooring
    2. Marble Stair Treads and Risers
    3. Marble Bases
    4. Marble Threshold
    • Materials for Application;
    1. Marble Flooring, Locally Made (Trans. # C-0063)
    2. Marble Flooring Sylvia Light (Trans. # C-0063Rev.1)
    3. Marble Flooring Sylvia Medium Light (Trans. # C-0063Rev.1)
    4. Marble Flooring Sylvia Medium (Trans. # C-0063Rev.1)
    5. Stair marble Sylvia Light (Trans. # C-0063Rev.1)
    6. Sand bed
    7. Sand Cement Mortar Mix, 1:3-4 by volume
    8. SBR

    Preparation:

    1. Sand beds under floor tiles spread and compact it manually to obtain uniform depth and distribution. Remove stones and foreign materials. Lightly rinse with water.
    2. Clean stone surfaces that have been become dirty or stained by removing soil, stains and foreign materials before setting. Clean stone thoroughly by scrubbing with fiber brushes and then drenching with clean water.
    3. Examine concrete surfaces of stairs, floorings, base, and threshold for compliance with the requirements for installation tolerances and other conditions affecting performance of stone finish of stairs. Proceed to installation if satisfactory conditions have been achieved.

    Tolerances:

    1. For position shown in plan for edges of steps, changes in color or finish and continuous joint lines, not to exceed 3 mm in 2400 mm, 6 mm in 6 m or 10 mm maximum.

    1. Do not exceed 3 mm in 3 m, 6 mm in 6 m or 10 mm maximum from level or slope indicated for surface plane flooring.
    2. Joint thickness shall not vary more than 1.5 mm or one fourth of the nominal joint whichever is less.
    3. Between planes and adjacent units it shall not exceed 0.8 mm.

    Installation:

    1. General

    a.) Execute flooring installation by skilled fixers and do necessary cutting at the site.

    b.) Produce lines cut straight and true, with edges eased slightly to prevent stripping. Use power saws.

    c.) Set stone to comply with drawings and shop drawings. Match for color and pattern by using units numbered in sequences as indicated.

    d.) Produce lines cut straight and true, with edges eased slightly to joints.

    e.) Produce lines cut straight and true, with edges eased slightly to standard specification referred for installation of stone paving an flooring.

    f.) Locate and install expansion joints according to requirements of standard specification referred for installation of stone paving and flooring.
    2. Flooring
    a.) Marble flooring shall be set with thick wet mortar bedding on sand bedding with a thickness of 25-30 mm.

    1. Each stone shall be carefully set into a level and line required and shall Be beaten along full surface area to ensure firm setting and full contact between mortar and back surface of the stone.

    c.) Tamp and beat stone with wooden block or rubber mallet to obtain full contact with the setting bed and bring finished surfaces within tolerances.

    3. Treads

    a.) Saturate with clean water several hours before placing setting bed. Remove surface water one hour before placing setting bed.

    b.) Apply cement paste slush coat over surface of concrete about 15 minutes before setting placing setting bed. Limit area of slush coat to avoid drying out before placing setting bed, the slush coat cement paste shall not exceed 1.5 mm.

    c.) Apply mortar setting bed over cement-paste slush coat immediately after slush coat has been applied. Spread and screed setting bed to uniform thickness at sub grade elevations required for accurate setting of stone to finish grade as indicated.

    d.) Place stone before initial set of cement occurs. Do not install one tread until riser of the preceding step has been set and mortar bedding suitable hardened.

    e.) Tamp and beat stone with a wooden block or rubber mallet to obtain full contact with setting bed and to bring finished surfaces within tolerances.

    f.) Set each unit in a single operation before initial set of mortar, do not return to the areas already set and disturbed stone for purposes of realigning finished surfaces or adjusting joints. Finish stair tread perfectly plumbed as to lines indicated.

    g.) Tool joints flat, uniform and smooth without visible voids.

    1. Risers

    a.) Set risers to line proceeding tread, provide top level edge and 25 mm clearance between back of riser and face of concrete step riser.

    b.) Fix temporarily in place with gypsum dots and fill back clearance with cement and sand grout mixed with sufficient water to obtain pourable consistency. The ratio of cement to sand must be 400 kg of ordinary Portland cement to 1 m3 sand.
    5. Bases

    a.) Bed marble bases in thick mortar approximately 10 mm thick and install directly to masonry wall coated with plaster dash coat.

    b.) Refer to the plans for the details on indicated drawings.

    c.) The exterior and interior corners must be mitered at 45º.

    d.) Grout joints, including joints with flooring with the same pointing

    mortar used in floors.
    6. Threshold

    a.) At locations adjacent to stone flooring, install stone threshold in same type of setting bed as abutting stone flooring.

    b.) Set threshold in thin set, latex-Portland cement mortar at locations where mortar bed would otherwise be exposed above other adjacent flooring.

    c.) At locations not adjacent to stone flooring, cut back and discard any setting bed material from the other finish side and leave mortar surface uniform with surface of threshold.
    7. Adjusting, Cleaning and Protection
    a.) Remove and replace marbles which are broken, damaged, stained, defective joints, stone paving and flooring not complying with other requirements indicated.

    b.) Apply sealer to cleaned stone flooring according to sealer manufacturer’s written instruction.

    c.) Prohibit traffic from the installed stone for at least 72 hours.

    Thanks for Engineer Ehab Ali who shared this document.

    • Share:
    Hany Ismail, MSC, PMP
    Hany Ismail, MSC, PMP

    Hany Ismael is the founder and CEO of Planning Engineer Est. in Egypt. He has started his career back in 2003 as a site engineer, technical office engineer, planning engineer, planning manager, and finally planning department manager where he has been involved in several mega construction projects in Egypt and Saudi Arabia. In 2016, he established his own company in Egypt “Planning Engineer Est.” Hany gained his MSc degree in project management from Liverpool University-UK 2013-2016, PMP certified from PMI-USA 2010, and BSc Civil Engineer Tanta University-Egypt 2003. Hany provided more than 3,500 hours of planning and project management training on his website planningengineer.net, YouTube channel, and offline courses since 2011. He enjoys teaching project management in simple and practical way, and he developed several planning tools, techniques and courses.

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