90% of indoor playground manufacturers use 118 cm inner tubes, so why do high-quality manufacturers insist on 117 cm?

Jul 28, 2026

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Yurelana
Yurelana
Yurelana is a seasoned expert in the indoor amusement equipment industry, specializing in the full-cycle optimization of indoor amusement facility projects—including planning, custom equipment design, layout planning, safety compliance.

In the indoor play structure manufacturing industry, the vast majority of competitors set the length of the inner tubes for platforms at 118 cm. However, Playpedia Amusement, a company with deep expertise in the indoor playground equipment sector, has consistently adhered to an inner tube specification of 117 cm. Many of our clients initially questioned this: Is a difference of just one centimeter really worth making a special adjustment during production? The answer lies in the details of site compatibility, installation precision, and safety during use.

 

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The industry-standard size for wooden platform panels is 122 cm × 244 cm, and after cutting, the standard platform unit size is 122 cm × 122 cm. Most manufacturers opt for 118 cm inner tubes, which results in gaps between the tube edges and the platform panels after installation. These gaps not only compromise the overall aesthetics but also pose safety hazards: children's clothing or fingers can easily get caught in the gaps while playing, and prolonged stress and shaking can cause the structure to loosen, shortening the indoor soft playground equipment's service life.

Playpedia Amusement precisely sets the inner tube length to 117 cm, paired with a 5 cm extension on the connectors, which perfectly covers the 122 cm platform width, achieving a seamless fit. The entire platform frame fits together seamlessly, significantly enhancing the structural rigidity. The impact force generated by children running and jumping is evenly distributed, preventing localized stress shifts or pipe loosening, and eliminating common safety risks such as pinching and wobbling at the source.

 

info-3024-4032Many customers worry whether shortening the length by 1 cm will reduce structural strength. In fact, we use hot-dip galvanized, rust-resistant vertical pipes with an outer diameter of 48 mm and a wall thickness of 2.5 mm, paired with steel rust-resistant fasteners that allow for an 8%–10% margin of error. Most screws are pre-installed at the factory, and an additional 10% of spare screws are provided. The pipes' impact resistance and corrosion resistance fully comply with ASTM and CE international certification standards. This 1-centimeter adjustment does not affect structural strength; on the contrary, the seamless joints further enhance the overall stability of the indoor playground.

 

 

 

For the on-site installation phase, we have developed detailed implementation guidelines: each pipe is marked with two serial numbers (one at the top and one at the bottom) and is packaged and transported in strict sequence; all pipe bends are pre-assembled and tested; and all fasteners are precisely aligned and securely fastened. Our indoor playground installation team takes full advantage of this seamless design to ensure a clean and level installation-whether in a shopping mall atrium, an early childhood education center, or a kindergarten playground.

 

From millimeter-level precision in production to comprehensive end-to-end services, we consistently uphold the philosophy of "mutual benefit and win-win": We provide free customized design solutions in the early stages to precisely plan platform layouts based on the site; strictly control rust prevention and material standards during production; handle transportation and installation from start to finish; and offer a one-year warranty and maintenance service. Our products are exported to many countries in Europe, America, Asia, and Africa, and we have earned global recognition through attention to detail and a strong reputation. 

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The safety of indoor commercial playground equipment often hinges on decisions made within a single centimeter. While following the trend of using generic specifications may be convenient, eliminating every potential hazard for children is the fundamental standard that high-quality play structures must uphold.Playpedia Amusement adheres to an 117-centimeter inner tube design not to be deliberately unconventional, but to prioritize children's safety and play experience above all else in our production standards.

 

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