30 Mar Understanding CCA Treated Pine Grades
Whether you are starting a new building project or renovating, it’s important to choose the right wood for a successful build or stable structures. However, the selection process involves understanding the different softwood grades. CCA pressure-treated pine is an eco-friendly construction material that is mostly favoured by homeowners and builders due to its sturdy characteristics, such as resistance to environmental elements compared to untreated timber.
This material is also treated with Chromated Copper Arsenate (CCA), which helps to extend its longevity and robustness because it protects it from moisture buildup, insects attack, and decay, making it suitable for different applications. In this blog, you will discover the various hazard classifications of treated pine to help you to choose timber perfect for your project. However, remember that each grade differs in stiffness, appearance, and strength!
CCA Hazard Classifications
H2 – Internal
Hazard class two is tailored for interior applications where the timber will not be exposed to dampness that can cause shrinkage, swelling, and mould, which can weaken the structural integrity of building materials. Curious what you can use it for? PAR CCA H2 is commonly used for flooring, roof structures, and internal framing.
H3 – External Above Ground
PAR CCA H3, a treated softwood in this classification is ideal for homeowners looking to build fencing, decking, and pergolas above the ground, as well as cladding because it can withstand weathering elements and insects. However, note that you must not use this type of treated lumber for underground installations that are in direct contact with soil, since it does not endure long-term exposure to outdoor conditions.
H4 – Outside In-Ground Contact
CCA pressure-treatment at this H4 level is suitable for exterior underground applications due to its protective barrier that helps to protect it against pest infestation and rot. Therefore, your pine poles, fence posts, and pergolas will resist moisture buildup even when they touch the soil. South African pine timber is a reliable and strong option for outdoor projects.
H5 – Heavy Duty Use
Looking for Chromated Copper Arsenate hazard classification materials that can handle constant exposure to moisture, especially for coastal areas? H5 timber is specifically designed to thrive well without compromising structural integrity when faced with environmental challenges. No need to worry about your demanding structures being damaged by decay, termites, or borer attack because this level of treatment offers long-term performance stability.
Structural Grades
The structural grades consist of different types of pine that are ranked based on density and load-bearing capacity, not only its aesthetics. There are lower and higher classes, which helps to determine the lumber durability for builders. We offer S5, which is considered as a standard strength grade perfect for lighter structural use like wall framing and roof trusses.
While higher grades like S7 are ideal for demanding applications that require load-carrying capacity and ability to resist bending. Therefore, homeowners can use it for roof structures, decking supports, beams, and lintels due to its greater sturdiness.
Why Select Our Pressure-Treated Softwood?
OnlineBuilding.co.za supplies affordable and sustainable CCA treated SA pine options with various grades for durable and long-lasting indoor and outdoor installations. Ready to use materials that can fight against fungi and pests? CONTACT US today for any questions or requests for quotations.