With the advancements in metallurgy throughout the early 20th century. Saw the introduction of tubular steel water pipes (instead of timber poles) with standardised dimensions, allowing for the industrial interchangeability of parts and improving the structural stability of the scaffold. The use of diagonal bracings also helped to improve stability, especially on tall buildings. The first frame system was brought to market by SGB in 1944 and was used extensively for the postwar reconstruction.[4