The average pictures and mirrors weight is less than 5kg. Mirrors and large framed pictures with glass will weigh more, in average around 10-15kgs. However, a our picture hanging systems are capable of supporting 20kgs per meter and even more, depending on the kind of rail that you choose. The hanging wires are either in Perlon (heavy duty Nylon reinforced with fiberglass) or steel-wire, with a loadbearing capacity of up to 50kg!