(1) Material Purchase Parts Requirements
1. The light steel framework is categorized into two types: U-shaped and T-shaped skeletons, and it is divided based on load capacity.
2. The main components of the light steel skeleton include large, medium, and small keels, while accessories consist of hanging parts, connecting pieces, and suspension inserts.
3. Additional parts such as booms, flower blue screws, nail guns, self-tapping screws, and other fasteners are also required for installation.
4. According to the design specifications, various types of cover panels can be used, including aluminum or plastic press bars. The materials must meet the required standards in terms of variety, size, and quality.
5. Adhesive should be selected based on the performance of the main material, and a bonding test should be conducted before actual use.
(2) Main Equipment
Essential tools include electric saws, reciprocating saws, nail guns, hand saws, planes, pliers, screwdrivers, measuring tapes, squares, rulers, and levels.
(3) Working Conditions
1. The structure should be built on an existing cast-in-place or precast slab. Pre-embed φ6~φ10 reinforced concrete booms according to the design. If no booms are needed, position the large keel accordingly, with general spacing between 900~1200mm.
2. When building on brick walls or columns, embed anti-corrosion wooden blocks at the ceiling level along the wall and column, spaced 900~1200mm apart. At least two wooden blocks per section.
3. Install all pipelines and ducts in the ceiling to determine the positions of lights, vents, and other openings.
4. Ensure all materials are fully prepared.
5. Complete all wet work on walls and floors before installing the ceiling panels.
6. Set up a working platform for the ceiling construction.
7. Before starting large-scale installation, create a model room to test the structure, light troughs, vents, and panel fixing methods. Approval is required before proceeding with full-scale construction.
(4) Installation Process
1. Procedure:
Layout lines → Install big keel booms → Install big keels → Install middle keels → Install small keels → Install cover panels → Install trim strips → Apply rust-proof paint
2. Layout Lines: Based on the floor elevation line, use a vertical ruler to mark the ceiling height on the walls and columns, drawing the layout line around the perimeter.
3. Install Big Keel Booms: After determining the ceiling level and keel positions, set the boom’s lower end elevation. Embed the bolt ends into the floor, and fix the rigid ribs.
4. Install Big Keels:
1. Fit the boom nuts.
2. Pre-install the hanging parts on the big keel.
3. Assemble the big keel with the hanging piece, insert it into the boom nut, and tighten.
4. Connect the big keels using connectors, pull wires to adjust the arch and straightness.
5. Install connection cards based on the node structures from the reference manual.
6. Secure the side keels with nails, spacing them 1000mm apart if no specific design is provided.
5. Install Middle Keels:
1. Mark the middle keel line and install the hanging pieces.
2. Hang the middle keel on the big keel using the hanging pieces, spacing them 500~600mm apart if no design is specified.
3. Extend the keel length by connecting with middle keel connectors while hanging, ensuring alignment.
6. Install Small Keels:
1. Mark the small keel line and install the drop pieces.
2. Hang the small keel on the middle keel using the hanging pieces, spacing them 500~600mm apart if no design is given.
3. Connect the small keels with connectors when extending their length, ensuring they are straight and fixed.
4. When using T-shaped keels, ensure each cover panel has a card cover installed for proper support.
7. Install Cover Panels: With the framework properly installed and inspected, place the cover panels from the center towards the edges. Use self-tapping screws spaced 200~300mm apart.
8. Apply Anti-Rust Paint: Before delivery, apply rust-proof paint to all exposed welded joints, such as embedded parts, hanging pieces, and connectors, to prevent corrosion. This should be done before covering the panels.
(5) Quality Standards
Comply with Articles 6.2.7 to 6.3.11 of GB-50210-2001.
(6) Finished Product Protection
1. During installation, protect all pipelines within the ceiling. Avoid attaching the light steel framework to ventilation pipes or other equipment.
2. Store and handle all ceiling materials carefully to avoid deformation, moisture, or rust.
3. Protect installed doors, windows, and finished surfaces like floors and window sills from damage.
4. Do not step on the light steel frame or hang any items on it.
5. Ensure that all internal pipeline tests and insulation procedures are completed before installing the cover panels.
(7) Common Quality Issues to Note
1. Uneven ceiling surface: This may occur if the big keel booms are not leveled correctly, leading to inconsistent elevations. Check the tightness of each lifting point and verify that the line meets the design requirements.
2. Poor node structure: Ensure that keels and connectors are properly placed around holes, light fixtures, and vents to match the design and structural guidelines.
3. Loose light steel frame: The frame should be securely hung on the main structure, and the boom nuts should be tightened to maintain the correct elevation. Avoid hanging any equipment on the frame.
4. Misaligned panel gaps: Pay attention to panel dimensions during installation and ensure the edges are aligned. Fix the panels straight and even.
5. Uneven seams: Pull a thread during installation and press the seam after aligning it to ensure a smooth finish.
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