What is a Mezzanine Floor Board?
A Mezzanine Floor Board is an ultra-high-density (≥ 1.50 g/cm³) structural-grade fiber cement panel. Unlike standard wallboards, it is engineered at thicknesses of 20mm to 30mm and subjected to massive 5000-ton hydraulic pressure before high-temperature autoclaving.
This creates a rock-solid, 100% asbestos-free structural slab capable of bearing immense live and dead loads. It acts as the primary walking surface or subfloor over steel frameworks, transforming high-ceiling spaces into multi-level environments without the need for heavy masonry.
Why Discard Concrete and Wood?
When creating intermediate floors, architects traditionally relied on wet-poured concrete or wooden plywood. However, modern commercial and residential codes demand faster, safer, and lighter solutions. Here is why Mezzanine Fiber Cement Boards have taken over the market:
| Performance Metric | Fiber Cement Mezzanine Board | Wet-Poured Concrete | Wooden Plywood / OSB |
|---|---|---|---|
| Dead Weight | Lightweight (~30% of concrete) | Extremely heavy (Requires massive structural reinforcement) | Very lightweight |
| Fire Safety | Class A1 (Non-Combustible, >2h rating) | Class A1 (Non-Combustible) | Class B/C (High fire hazard) |
| Construction Method | 100% Dry Construction (Fast) | Wet construction (Messy, 28-day curing time) | Dry construction |
| Space Saving | High (Only 20-30mm thick, maximizes headroom) | Low (Thick slabs reduce ceiling height) | High |
| Durability | Immune to moisture, rot, and termites | Excellent | Degrades from moisture, prone to termites |
Where is Mezzanine Floor Board Best Applied?
Because it drastically reduces the building’s dead load while meeting strict fire codes, this board is the mandated choice for:
- Commercial Office Expansions: Adding second-story office spaces or storage areas within high-ceiling warehouses.
- Retail & Showrooms: Creating elevated VIP viewing decks or multi-tier display areas.
- Duplex & Villa Renovations: Dividing 5-meter-high residential spaces into two functional floors without compromising structural safety.
- Modular & Steel Buildings: Serving as the primary flooring substrate for prefabricated steel-frame structures.
How to Build the Steel Sub-Frame?
A mezzanine floor is only as strong as its foundation. The supporting steel framework must be engineered correctly before the boards are laid:
- Main Beams: Typically constructed from heavy I-beams or Channel steel. Sizing must be calculated by a structural engineer based on span and load requirements.
- Secondary Joists: Constructed from square tubes or angle steel. These must be welded to form a precise grid spacing of 600mm × 600mm or 600mm × 1200mm.
- Welding & Prep: All welds must meet standard structural codes. Crucially, any weld seams on the top surface where the fiber cement board will rest must be ground completely flush to ensure the boards lay perfectly flat.
What are the Panel Installation Rules?
To guarantee floor stability and prevent cracking, contractors must follow these strict dry-installation protocols:
- Orientation: The long edge of the board must run perpendicular to the main load-bearing beams.
- Edge Support: Panel joints must always meet directly over the center of a steel joist. Never leave a panel edge hanging unsupported in mid-air.
- Expansion Gaps: Leave a 3mm gap between adjacent boards to accommodate microscopic structural shifting. Fill this gap with structural silicone sealant or flexible cement mortar.
- Fastening: Use countersunk self-drilling dovetail screws. Screws must be driven 20mm from the board edges and spaced every 300mm to 600mm across the grid.
- Surface Finishing (Optional): For extreme load scenarios, contractors can lay a steel wire mesh over the boards and pour a 30mm–60mm layer of cement mortar before applying ceramic tiles. Alternatively, wood flooring or carpet can be installed directly onto the raw board.
What are the Technical Specifications?
(Tested in compliance with structural load-bearing and fire safety standards for mezzanine applications).
| Engineering Metric | Oguards Structural Specification |
|---|---|
| Standard Dimensions (W × L) | 1200 / 1220 mm × 2400 / 2440 mm |
| Structural Thickness | 20 mm / 24 mm / 25 mm / 30 mm |
| Density Classification | High-Density (≥ 1.50 g/cm³) |
| Fire Classification | Class A1 (Non-Combustible) |
| Impact & Bending Strength | Superior load-bearing capacity; highly resistant to foot traffic vibration |
| Acoustic Performance | Significantly better sound attenuation between floors compared to timber |
| Health & Eco-Safety | 100% Asbestos-Free, Zero VOCs, Zero Formaldehyde |
