# @stem_antics on Instagram

- **Type:** Video
- **Original URL:** https://www.instagram.com/p/DVGvLmOEdhZ
- **Gondola URL:** https://gondola.cc/posts/61935936-stem-antics-instagram
- **Thumbnail:** https://img.gondola.cc/tr:w-,h-,fo-auto/postThumbnails/d486b1de8d.jpg
- **Posted:** 2026-02-23T15:22:07.000+00:00
- **Account Owner:** Stem Antics (@stem_antics) — https://gondola.cc/stem_antics

## Caption

Here’s the process in simple terms:

1️⃣ Rebar skeleton
Steel reinforcing bars (rebar) are arranged in a long cylindrical mold. This steel “cage” gives the pole tensile strength (resistance to pulling and bending forces from wind and cables).

2️⃣ Concrete pour
High-strength concrete is poured around the rebar inside the mold.

3️⃣ High-RPM spin
The entire mold is spun at high speed (centrifugal casting).
The spinning forces the concrete outward, compacting it against the mold walls and naturally forming a hollow core.

Why make it hollow?
• Uses less material (lighter + more efficient)
• Improves strength-to-weight ratio
• Easier transport and installation
• Space for internal cables in some designs

Why are concrete poles useful?
✔️ Resistant to rot, insects, and fire
✔️ Longer lifespan than many wood poles
✔️ Handle heavy loads and high winds
✔️ Lower long-term maintenance

It’s a perfect example of materials science + structural engineering solving a real-world problem.

Next time you see a utility pole, you’re looking at centrifugal force in action.

What everyday object should we break down next? 👇

#STEMeducation #CivilEngineering #EngineeringExplained #Infrastructure  #stemantics

## Stats

- **Views:** 53,007
- **Likes:** 1,843
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- **Comments:** 13

## Tags

infrastructure, stemeducation, engineeringexplained, civilengineering, stemantics

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