3 Star Inc FRM-HDW Non-Penetrating Flat Roof Mount BASE ONLY for 1.50"-2.25 inch OD Antenna Mast
3 Star Inc
Made in the USA!
The FRM-HDW is a Base Only, User Supplied Mast, Non-Penetrating Roof Antenna Mount and is Ideal for Light Off-Air TV, Cellular, Wireless Internet, SCADA, CCTV, Telemetry and Small Diameter Narrow Beam-width Antenna mounting and can be used in Non-Penetrating, Guyed or Bolt Mount Flat Roof or Ground level configurations. The Assembly comes with a GR-3 Universal Clamp that accommodates masts from 1.5 to 2.25 inch OD and set screws to secure. The mast You supply will need to be drilled to accept a 1/4-20 carriage bolt that secures the mast bottom to the Frame Base. The FRM Base provides a stable, temporary or semi‑permanent mounting solution that avoids roof membrane penetrations, is constructed of pre-galvanized 12 Gauge steel and typically uses 8 standard (8 x 8 x 16 inch) concrete blocks as Ballast on a 35.5 x 35.5 inch Rectangular Base Frame. This Order is for the Base Frame Only (No Mast, Cinder Blocks or Mat Supplied). Bring your own Mast and drill to fit!
Height and Antenna Loading capability are dependent upon ballast weight to counter the tip-over moment of the Windspeed rating desired. In addition to the Windspeed Loading Data found under the "Specification" tab (if Available), You need to Consult an Engineer to determine the Building Code Requirements and Load Bearing Capacity of the roof structure where you will be installing this mount. It is Important to choose a Mount and Mounting Location with a Picture of the Finished Installation in Mind. Be Sure to First select a location that lends itself to applying a Load without Compromising the Integrity of the Material you place the mount on top of; i.e. roof membrane, covering, decorative cover, etc., or the Structural Members beneath. Next consider the Location over a Lifetime of Adjustments, does it lend itself to modifications in Height or Direction? Larger Antennas increase the surface area presented to air movement and thus, Wind-load does increase. As the height of the mast increases from Its last attached point on the structure, the torque applied in cantilever towards the tip-over moment also increases with Antenna off-center Weight and Wind-Load EPA (Effective Projected Area), requiring a more substantive Downward Force and/or Load Dissipation; i.e. supplemental Down-guys may be required as to keep ballast weight within Load-bearing capacity. Keep the Distance Minimal from the Antenna to the Equipment you feed, as to minimize loss and the need for Amplification.
A Retention Tether SCK150 (Safety Cable Kit) is required for Commercial Installations to mitigate Loss and Damage to Property, Further, the FRM-PAD or FRM-MAT is recommended for all installations to prevent slippage, distribute weight more evenly and prevent damage to the roof surface
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*Redesign Difference from Legacy "RT" to New "RTL" Towers*
The "RT" Series Tower Sections had cross bracing segments that spanned from one Tower Section to the next.
The "RTL" Series Towers Sections feature cross bracing that starts,stops and is contained within the same Tower section; making it easier to assemble a complete tower section on the ground for lifting and easier attachment/fitting onto the next Tower Section during erection.
The ROHN RTL Series Self-Supporting Towers
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About The Rohn RTL Series Tower
The ROHN Pre-engineered RTL towers consist of three standard series Light, Medium and Heavy. The standard Rohn RTL tower series can be used for Risk Category I, II, Ill and IV structures and have been designed for multiple uses including:
- Cellular, PCS and Other Two-way Communications Towers
- Microwave
- Public Safety
- Broadcast
- Surveillance & Security Camera Mounts
- Weather Stations
- Sports Lighting
Available Accessories
Rohn also offers a wide variety of accessories designed to be used with the Rohn RTL towers including:
- Tower Antenna Mounts
- Tower Side Arms,
- Tower Dish Mounts,
- Tower Platforms,
- Lighting & Grounding Accessories,
- Tower Climbing Ladders,
- Waveguide Ladders,
- Safety Climbing Devices,
- Mounting Frames,
- Ice Shields
Rohn RTL Tower Features
The benefits of choosing the ROHN Standard Series RTL towers can result in rapid deployments with significantly reduced shipping and installation schedules. Plus all RTL Towers include these great features
- Standard Series available in heights from 40' up to 190'
- High strength 50,000 psi (50 ksi) legs, angle bracing and connection plates
- High strength structural bolts
- Round legs for easy mounting of antennas, mounts and other accessories
- Compatible with ROHN Standard accessories
- Hot-Dip Galvanized after fabrication for unmatched corrosion protection
- Open cross section at ends of legs for complete galvanizing protection
- Knockdown bolted construction for efficient shipping, assembly and future upgrades
- Complete assembly drawings package provided with the tower
- Standard and site-specific foundation designs available upon request
- PE Certification available for standard or site-specific applications
- Custom tower designs available for heights up to 350', upon request
