The dimensions of A36 angle steel, including side lengths and thickness, directly impact its load - bearing capacity. Generally, as the side lengths increase, the cross - sectional area of the angle steel grows, enabling it to carry more load. A larger cross - sectional area provides greater resistance to bending and compression forces. Thickness also plays a crucial role; a thicker section can withstand higher stresses without deforming or failing. For instance, in a structural truss, larger - sized A36 angle steel with greater side lengths and thicknesses can be used for the main load - bearing members, effectively transferring heavy loads from the roof or upper levels to the foundation. Conversely, smaller - dimensioned angle steel is suitable for lighter loads, such as in the construction of non - structural components or in applications where space limitations restrict the use of larger sections.