The amount of weight that furniture grade PVC can hold depends on several factors, including the size and thickness of the PVC pipe, the specific design and construction of the furniture, and the distribution of weight on the furniture.

Generally speaking, furniture grade PVC can hold a significant amount of weight when used properly and designed appropriately. However, it is important to keep in mind that PVC is not as strong as other materials commonly used for furniture, such as wood or metal.

In general, 1 inch diameter furniture grade PVC pipe can hold approximately 150 pounds of weight, while 1.5 inch diameter furniture grade PVC pipe can hold around 280 pounds of weight. Thicker pipes with thicker walls and larger diameters can hold even more weight.

When designing and constructing furniture with PVC, it is important to consider the intended use and weight capacity of the furniture, and to choose appropriately sized PVC pipes and fittings to ensure that the furniture is strong and stable. In addition, reinforcing elements such as brackets, supports, and crossbars may be used to increase the weight capacity of the furniture.