There is no uniform standard for the thickness of roof trusses; they must be custom-designed to match the roof type, span length, local wind and snow loads, and operating environment. Selecting the appropriate model based on specific requirements is the safest, most cost-effective, and most professional solution.

1. Residential rooftop applications: A lightweight, standard-thickness option is sufficient.

Most rural self-built homes and urban residences feature sloped roofs or small flat roofs. With short roof spans, low overall loads, and no exposure to strong winds or heavy snow, these represent the installation scenarios with the mildest load conditions.

Residential PV systems have a compact layout and short array spans, so conventional wind and snow loads exert limited pressure on the mounting structures; therefore, there is no need for thicker profiles. Selecting PV mounting systems with standard industry thicknesses is sufficient to ensure structural safety for 25 years. This approach guarantees adequate rigidity and stability while keeping the overall weight in check, thereby preventing long-term roof aging due to pressure and avoiding damage to roof tiles.

Key considerations for residential applications: lightweight design, compatibility with the roof, standard strength, and no excessive weight.

2. Industrial and commercial buildings, large-scale solar power plants: Moderately increase the thickness of the main beams and columns

Commercial and industrial rooftops, steel-framed factory roofs, and large-scale distributed power plants are characterized by long spans, extended arrays, and contiguous layouts. The spans of their support beams and columns are significantly greater than those of typical residential projects, resulting in a larger wind-exposed area, higher snow loads, and greater long-term fatigue wear.

This is particularly true in snowy northern regions and windy inland plains, where heavy snow accumulates in winter and frequent gusts occur in summer; prolonged loads can easily cause slight sagging and deformation in standard structural profiles. Therefore, commercial and industrial projects require targeted reinforcement of core load-bearing components—such as main beams and columns—to enhance overall resistance to bending, shear, and wind pressure, ensuring that large-scale arrays remain free from deformation, loosening, or sagging over the long term.

Key Considerations for Commercial and Industrial Applications: Reinforcing critical components, upgrading structural strength, and ensuring compatibility with large-span arrays.

3. Harsh Environments: Coastal Areas, High Winds, and High Altitudes—Precise Thickening + Reinforced Components

Coastal typhoon-prone areas, open wilderness, and high-altitude regions present the most demanding load conditions for photovoltaic mounting systems. These areas are characterized by strong winds, frequent gusts, and high wind pressure coefficients. Additionally, coastal regions face salt fog corrosion, posing a dual challenge to the strength and durability of the mounting systems.

For these scenarios, simply increasing the thickness of all profiles is not a sound approach, as it would result in excessive dead weight. The professional design solution involves appropriately thickening the main beams and columns that bear the primary loads, while maintaining standard thickness for secondary profiles. This is combined with reinforced fittings, strengthened connectors, and denser spacing. This approach significantly enhances wind and vibration resistance while strictly controlling the overall roof load to avoid excessive weight gain.

Key considerations for selecting designs in harsh environments: precise thickening at stress points, reinforcement with accessories, structural optimization, and controlled dead weight.

Our POWERACK solar mounting systems are designed with standard thicknesses strictly in accordance with the requirements of different application scenarios. The cross-sections of the profiles have been mechanically optimized to ensure wind resistance and load-bearing capacity without resorting to unnecessary thickening. The entire product line uses base materials that comply with national standards, combined with comprehensive anti-corrosion processes. Our products meet all specifications, offer outstanding value for money, and come with comprehensive warranty services, making them suitable for a wide range of distributed and utility-scale solar projects.