ã€China Aluminum Industry Network】 IV. Construction 1. The deviation of reserved holes in concrete walls/windows is greater than the code requirements; the deviation of reserved holes in masonry windows and doors is greater than the code requirements.
2. The line is in error, and the installation deviation of the aluminum alloy door is obvious and does not conform to the specification.
3, doors and windows reserved hole size is greater than the specification requirements.
Precautions;
1) Before the on-site installation of aluminum alloy doors and windows should be strictly accepted doors and windows openings and grass-roots level, etc., to ensure that the hole size, location meet the design requirements, grassroots defects rectification is completed, and passed re-qualified to ensure that the design requirements;
2) Acceptance records for the entrances and exits of the doors and windows, records for acceptance at the primary level, and records for rectification shall be provided;
3) Before installing the window frame or sub-frame, check the key points:
• The size of the door/window hole meets the design requirements, and the gap width is matched with the filling material and method;
• Base surface treatment meets design requirements, without slag, honeycomb, cracking, etc.;
• The specifications, cross-section, quantity, and distribution of the embedded parts meet the design requirements.
4. The size of the reserved hole for windows and doors is less than the standard requirement, and the local concrete is smashed until it is exposed. The rectification is difficult and hidden risks are hidden.
Matters needing attention: The construction process should form the inspection mechanism and set inspection points, such as entrance acceptance, grassroots rectification correction, connector spacing, caulking plug box, waterproof layer settings, etc., and by the dedicated monitoring personnel to verify and make records, prevent errors And omissions.
5. The bay window platen collapses and the corner column is suspended. The hole rectification and inspection are not strictly controlled. The aluminum window has structural safety and leakage risks; the concrete window has not been repaired before the concrete defect is found, and hidden troubles are hidden.
Matters needing attention: should be equipped with door and window openings acceptance records, grassroots acceptance and rectification records;
6. The embedded parts are biased and have not been corrected. The connection method is irrational and is firmly doubtful.
7. The connection screws between the connector and the sub-frame are loose and firmly doubted; the substrate is cracked by nails, and there is a strong doubt, and the hidden cracks in the decorative surface are greatly increased.
Precautions:
1) Check the installation of doors and windows as follows:
• The verticality, squareness, elevation, corrosion protection, etc. of the sub-frame/window frame meet the design requirements;
• The number and spacing of connections are correct;
• The width, thickness, length, and anti-corrosion treatment specifications of the connectors meet the requirements of the model and design; the strength of the fixed nail guns should meet the requirements, but the matrix must not be destroyed;
• The nails should be placed in a firm matrix and should not be placed in areas with low stiffness (such as mortar joints).
2) Workers should have sufficient manipulation techniques for nail guns.
8. The joints are hitting the masonry or the mortar joints wrongly; the spacing of the joints is greater than the design requirements; the nails of the joints are erroneously hit on the non-concrete blocks.
Note: The installation process meets specifications, design and contract requirements. The inspection focuses are as follows:
1) The stiffness of the substrate meets the design and structural calculation requirements;
2) In accordance with the design and contract requirements, in order to install a waterproof layer around the base of the mouth (if applicable);
3) Fix the sub-frame or window frame according to the drawing, fixing the nail/bolt firmly, and do not damage the integrity of the substrate;
4) defects such as vertical, square, flat, no size, etc.
5) Do not use the method of installing first and then build the mouth.
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