Wind can be dangerous
Tutus offers a variety of sizes and configurations of products to help maximize the options available when making your selection to prevent the hazard of dropping tools and debris.
Why does Tutus limit the wind speed to 15 mph ? ? ?
Wind speeds increase 50% with every 50 ft. of elevation. So if someone takes a reading at ground level and the anemometer shows 15mph conditions. The work needs to be postponed with the D.O.P.S. because the basket is subjected to 28 mph winds at a 70ft working height.
Understanding ANSI/SAIA A92.20 Section 4.2.2.4 Wind Forces
Outdoor MEWPs refer to aerial lift equipment subjected to wind.
All wind rated MEWPs are expected to withstand 100n/m2 based on a 28 mph gust. Analysis may be conducted from Computational Fluid Dynamics (CFD) modeling or physical testing. Wind foreces are assumed to act horizontally, shape factors applied to surfaces exposed to wind shall be considered. The surface area of one person is detailed, representing a 5'8" tall worker. The number of people the platform can hold shall be calculated. The tools and equipment must be multiplied by their mass acting horizontally at a height of 1.5ft above the work floor.
Research and Considerations for D.O.P.S.
Pressure Drop Across Screens (Perry's handbook)
Pressure Loss Coefficient (Perry's Handbook)
Fractional Free Area. The flow of air through wire screens.
Will Tutus Allow Wind Speeds of Up to 28 mph?
Currently neither OSHA Regulations or National Standards outline an avenue in which TUTUS may define or recommend a wind speed for its products. Only through continued collaboration with the manufacturers of MEWP equipment may TUTUS provide authorization on wind speed. Currently our efforts have resulted in written authorization from responsible manufactures to use D.O.P.S. products in 15mph wind speeds. It is our goal to see that number increased to 27mph on average.
Upon request a certificate of compliance is available to our customers. The letter was formed in response to changes with the ANSI/SAIA A92 standards. The letter addresses use and application on brands of equipment TUTUS never received a response for modification. We continue to work closely with Industry Standard Bodies, Engineering Firms, and Wind Force Laboratories.
Space Alliance Technology Outreach Program Assist TUTUS
Wind analysis results in new mesh
The Gladiator Mesh by Tutus.
This mesh has been in development since 2016 and just being made available this year as part of our fall 2021 Gladiator mesh line. We will be incorporating this engineered mesh into our Universal and Modular product line.
Contact us if your in need of a wind rated mesh that your needing to purchase in raw amounts. This is a superior alternative to readily available debris mesh.
Forrest Hester
An advocate of assisting operators to promote safety. Forrest volunteers as the Chairman of the Aerial Work Platform Council with the Scaffold Access Industry Association (SAIA); In addition to his time with the SAIA Board of Directors;
- A certified instructor with the National Center for Construction Education and Research (NCCER);
- A member of the ANSI-Accredited Standards Developers (ASC) A92 committee Main Body;
- Secretary for ANSI/SAIA A92.24 Training Requirements For The Use, Operation, Inspection, Testing And Maintenance Of Mobile Elevating Work Platforms (MEWPs);
- ANSI/SAIA A92.22 Safe Use Of Mobile Elevating Work Platforms (MEWPs) Member;
- ANSI/SAIA A92.20 Design, Calculations, Safety Requirements And Test Methods For Mobile Elevating Work Platforms (MEWPs) member;
- ISO/TC 214 Elevating work platforms TAG for Safe Use Of Mobile Elevating Work Platforms (MEWPs);
- North American Regional Council (NARC) with the International Powered Access Federation (IPAF).
- Founder of TUTUS LLC, a components part manufacturing company of dropped object prevention enclosures for aerial work platform equipment.
- Inventor of the Dropped Object Protection System (D.O.P.S.) product line.