Other Structures

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Other Structures

Keystone Co., Ltd. has extensive experience in inspecting and surveying a wide variety of structures.

Our engineers utilize advanced rope access techniques to move safely and efficiently across structures, performing detailed close-up visual and tactile inspections.

In addition, by using our proprietary AnaPro360 Shaft Imaging System, we can easily capture precise panoramic images of vertical surfaces, greatly enhancing the accuracy of inspection data.

Examples of Structure Inspections

Surge Tank Inspections

ロックシェッド点検

トンネル点検

サージタンク点検

ボックスカルバート点検

余水路、鉄管路点検

Data Compilation, Analysis & Reporting

Here is an example of our deliverables.

High-Quality
Deliverables
— Ready for Immediate Use

We create inspection reports with a focus on clarity, technical precision, and immediate usability.

[Report Contents]
• Executive Summary
• Survey Result Diagrams (front views, plan views, annotated photo elevations, etc.)
• Cross-Sectional Diagrams
• Photographs and Comments

All inspections are conducted in accordance with the relevant official guidelines.
We evaluate damage and classify recommended countermeasures based on these standards.
We also flexibly format and present findings to meet your specific needs.

Technical Manuals & Work Plans

These documents contain detailed work procedures and safety protocols.
Please download and review them as needed.

Handbook Vol. 1

Handbook Vol. 2

Work Plan

Safety Management Checklist

Rope Access Safety Guidelines

Rope Access Procedure for Dam Inspections

Public Relations & Direct Mail

On-Site Photos

Frequently Asked Questions

Q. Isn’t this dangerous?

A. We strictly follow Japan’s Occupational Safety Regulations.

Thanks to this, we’ve had zero accidents in 33 years of operation.

Q. How much does it cost?

A. We tailor our proposals to your budget.

We consistently deliver high-quality work that meets expectations—even under tight budget constraints.

Q. Can work be performed in rainy weather?

A. Yes. Our rope-based safety systems allow us to continue working safely even in light rain and wind.

Q. Do you use only one rope? What about a lifeline?

A. We usually do not use a secondary lifeline. Our method follows approved rope access safety procedures under Japanese regulations.

Q. Are your workers climbers?

A. No. This is a different field. All of our personnel are certified rope access professionals, not recreational climbers.

Q. What’s the typical project timeline?

A. We respond flexibly based on your schedule and requirements.

Our Commitment to You

The Best Plan, Centered Around Your Budget

At Keystone, we provide highly cost-effective structure inspection services through the expertise of our skilled and dedicated team.

We always prioritize your budget, finding the best solutions and applying creative approaches to deliver outstanding results.

We never decline projects due to financial constraints. In fact, we view challenging conditions as opportunities to demonstrate our ingenuity and technical strengths.

For a detailed estimate or consultation, feel free to contact us.
We also provide flexible formatting of inspection results tailored to your needs.