Cross-Laminated Timber (CLT)
Romanian Technical Denomination: Lemn Lamelat Încrucișat (CLT)
Engineered solid wood panel product manufactured by gluing orthogonal layers of structural timber boards, offering high rigidity and carbon sequestration.
LEVEL 1: QUICK UNDERSTANDING (EXECUTIVE SUMMARY)
INVESTORS & DEVELOPERSEngineered solid wood panel product manufactured by gluing orthogonal layers of structural timber boards, offering high rigidity and carbon sequestration.
Multi-story residential and commercial timber buildings (up to 8-12 stories), Structural floor slabs and shear wall assemblies
01. TECHNICAL OVERVIEW & ENGINEERING CHARACTERISTICS
Cross-Laminated Timber (CLT) is an engineered wood product manufactured in accordance with SR EN 16351. Consists of 3, 5, or 7 orthogonally stacked kiln-dried softwood boards bonded under pressure with structural polyurethane adhesives. Delivers bi-directional load bearing, high in-plane shear capacity, predictable charring rate in fire conditions, and negative embodied carbon.
02. CONSTITUENTS & MANUFACTURING SPECIFICATION
- ▸C24 strength-graded softwood boards (spruce/fir) kiln-dried to 12% ± 2% moisture content
- ▸Formaldehyde-free 1-component polyurethane (1K PUR) or EPI structural adhesives (SR EN 15425)
✓ ADVANTAGES & STRENGTHS
- •Negative embodied carbon (sequesters ~1 ton of CO2 per cubic meter of timber)
- •Lightweight structure (approx. 1/5th weight of concrete), drastically reducing seismic inertial forces
- •Exceptional dimensional stability due to orthogonal cross-lamination
- •Predictable charring rate providing natural fire protection to interior wood core
⚠ LIMITATIONS & RISK FACTORS
- •Strict moisture protection required during transportation, storage, and erection
- •Requires acoustic decoupling membranes to mitigate low-frequency impact sound transmission
- •Emerging supply chain in Romania with higher dependence on central European manufacturing