Scaffoldless Construction Method

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Scaffoldless Construction Method

Keystone Co., Ltd. provides advanced rope access techniques that enables inspection and repair work in high or confined areas without the need for scaffolding. Our services cover a wide range of inspections, surveys, and maintenance work, including bridges and slopes.

All of our team members are full-time employees and certified rope access technicians. As a professional team, we deliver high-quality inspections and repairs. We also conduct regular rescue training to ensure rigorous safety management.

With over 30 years of accident-free operations, we are active nationwide with a highly mobile workforce. Our skilled, full-time technicians handle even emergency site work, flexibly adjusting to tight schedules and offering efficient operations through manpower-based deployment.

Various Rope Access Solutions

Non-Scaffold Inspections and Repairs Inside Factories

We provide inspections, repairs, and installations inside factories without scaffolding. Our methods ensure clean, damage-free work that protects equipment and facilities. We offer safe and efficient support from inspection through repair.

Theme Park Attraction Inspections and Repairs

Our rope access techniques eliminate the need for temporary scaffolding and allow us to work during short timeframes or at night. With a long track record at world-renowned theme parks, we ensure safe and efficient inspections and repairs of attractions.

High-Altitude Inspections: Wind Turbines, Towers, Chimneys

We conduct inspections and repairs on tall structures such as wind turbines, chimneys, and lighting towers using rope access. No scaffolding or heavy machinery is required, enabling shorter work periods and reduced costs.

Exterior Wall Maintenance

For tasks on high-rise building exteriors or fragile surfaces like eaves, we offer safe rope-based operations—even in sites where conventional contractors face difficulty. We can also accommodate time-limited or nighttime work schedules.

Air Conditioner Installation, Removal, and Maintenance

We handle AC units even in tight or high locations. Where typical contractors may struggle, our rope access methods ensure safe, reliable work under difficult conditions.

Sign Installation and Removal

We provide safe and efficient sign installation/removal services at heights. Our team can operate effectively under time restrictions or during night hours.

Data Organization, Analysis, and Reports

Ready-to-use deliverables with
uncompromising quality standards

[Report Contents]
• Executive summary
• Survey result development drawings (elevation views, plan views, photographic elevation views, etc.)
• Survey result cross-sectional drawings
• Photographs and photo commentary

* Inspections are conducted in accordance with various inspection guidelines.
* Damage assessment and countermeasure classification determination in accordance with each guideline.
* Inspection result organization is flexibly handled to meet your specific requirements.

Technical Manuals & Work Plans

These documents provide detailed procedures and standards. Please download and review them as needed.

Handbook Vol. 1

Work Plan

Public Relations & Direct Mail

On-Site Photos

Technical Documents

Frequently Asked Questions

Q. Isn’t this dangerous?

A. We fully comply with Japan’s Industrial Safety and Health Regulations.

Thanks to our strict safety protocols, we’ve had zero accidents in 33 years.

Q. How much does it cost?

A. We tailor our services to fit your budget.

Our clients are consistently satisfied with the value we deliver—even under tight constraints.

Q. Can you work in the rain?

A. Yes. Our rope systems ensure safety even during light rain and wind.

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

A. We typically do not use a second lifeline.

Our approach complies with legal safety methods for rope access work in Japan.

Q. Are your workers climbers?

A. No. This is a different field. All of our team members are trained rope access professionals, not sport climbers.

Q. How long does the work take?

A. We flexibly adjust to meet your requested deadlines.

Our Commitment to You

Customized Solutions Based on Your Budget

At Keystone, we provide highly cost-effective inspection and repair services backed by technical excellence and motivated staff.
We prioritize your budget and always aim to deliver the best results through ingenuity and expertise—even under tight constraints.

We never turn away projects simply due to limited funds.
We believe that challenging conditions are exactly where our value shines.

Please feel free to contact us for more information or a detailed estimate.
We also flexibly tailor inspection result formatting and reporting to match your needs.

Scaffoldless Construction Method

Scaffoldless Construction Method

Various Rope Access Solutions

Non-Scaffold Inspections and Repairs Inside Factories

Theme Park Attraction Inspections and Repairs