Which innovative product, introduced in 1906, allowed architects to design buildings with open floor plans and large spans without load-bearing walls?

Test your knowledge about a groundbreaking product that revolutionized architectural design in the 20th century. This product transformed how architects approach structural systems and enabled entirely new forms in modern architecture. Its development marked a significant shift in construction technology and continues to influence contemporary building designs worldwide.

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Reinforced concrete
Structural steel I-beams
Laminated glass
Curtain wall systems