鋼管材質（Tubular steel)也在THONET產品組合中，有著十分重要的地位。作為1930 年代世界上最大的創新鋼管家具的生產商 ，THONET與眾多著名的Bauhaus設計師，包括Mart Stam, Marcel Breuer 和 Le Corbusier等合作，將忠於質材、形隨機能的實用性設計發揮到極致。當中最具開創性的「懸臂椅」（Cantilever Chair），更被定義為20世紀最重要的創新設計之一。

Tubular steel also plays a crucial role in THONET's product portfolio. As the world's largest producer of innovative tubular steel furniture in the 1930s, THONET collaborated with numerous renowned Bauhaus designers, including Mart Stam, Marcel Breuer, and Le Corbusier, to achieve the pinnacle of practical design that adheres to the material and aligns form with function. The most groundbreaking of these, the Cantilever Chair, is considered one of the most significant design innovations of the 20th century.

S32 & S64 Cantilever Chair, by Marcel Breuer, 1928

由Marcel Breuer於1928年設計的S32（Cesca Chair)，是懸臂鋼管椅中的代表作，也是Bauhaus風格家具中的經典。通過以彎曲的木質框架代替鋼管，設計師巧妙地減少了對額外支撐力的需求。藤編的椅墊與椅背與鋼管的使用形成了強烈的對比，卻又和諧地將傳統及創新的元素配合在一起。無扶手版的S32和帶扶手版的S64的簡約設計令其可以自然融合於不同風格的室內空間中，在將近一百年後依然散發著經典設計的魅力。

The S32 (Cesca Chair), designed by Marcel Breuer in 1928, is a masterpiece of cantilevered tubular steel chairs and a classic of Bauhaus-style furniture. By replacing tubular steel with a curved wooden frame, the designer cleverly reduced the need for additional support. The rattan cushions and backrest contrast strikingly with the tubular steel, yet harmoniously blending tradition and innovation. The minimalist design of the armless S32 and armrest-equipped S64 models allows them to blend seamlessly into diverse interiors, retaining their iconic charm nearly a century later.

214 Bentwood Chair, by Michael Thonet, 1859

開創了現代家具歷史的「No.14」曲木椅，現稱為 214 Chair，是被視為現代工業量化生產家具的始祖設計。從草圖創作直到1930年，共賣出超過5000萬張，是當時其中一張銷售量最佳的椅子。 突破性的設計來自Michael Thonet 於1850年代便開始研發的彎曲實木的創新技術。設計非常精簡，僅需六個組件便能組成一張經典座椅。縝密的設計也考慮了運送時的需求，36張拆卸下來的椅子可以裝進一個一立方米的盒子裡，十分有效地利用空間和方便運送。作為著名維也納咖啡椅的214 Chair由1930年開始便出現在不同的經典電影中。

The bentwood chair "No. 14," now known as the 214 Chair, which pioneered modern furniture, is considered the forefather of modern industrial mass-produced furniture. From its initial sketches until 1930, over 50 million units were sold, making it one of the best-selling chairs of its time. This groundbreaking design stems from Michael Thonet's innovative technique for bending solid wood, which he began developing in the 1850s. The design is remarkably streamlined, requiring only six components to create a classic chair. The meticulous design also takes into account shipping requirements; 36 disassembled chairs can be packed into a one-cubic-meter box, making for efficient use of space and easy transport. The 214 Chair, a famous Viennese café chair, has appeared in classic films since 1930.