Adjustable Roof Overhang Antenna Bracket – Galvanised Steel, Roof Pitch 26–54°
The AS51900 is an adjustable roof-overhang mounting bracket designed for suitable satellite and antenna installations on a structurally sound roof rafter below or within the roof overhang area.
The concept allows an antenna support to be installed without routing a mast through the main roof covering, provided the actual building and roof geometry permit this type of installation.
Rafter mounting below the roof overhang
The bracket is designed to transfer the antenna load into a suitable roof rafter rather than relying on the exterior wall as the primary structural mounting point.
Typical applications include buildings where:
a roof mast penetration is undesirable
a façade fixing should be avoided
a suitable rafter is accessible below the roof overhang
No mast penetration through the main roof covering
With a suitable installation, the antenna support does not need to pass through the roof tiles.
This can eliminate the usual mast penetration components such as:
antenna roof tile
roof flashing
mast sealing collar
at that specific mast position.
Roof pitch adjustment 26–54°
According to the available product data, the bracket can be adjusted for roof pitches from approximately:
26°
to 54°
Actual installation suitability also depends on rafter geometry and the design of the roof overhang.
Galvanised steel construction
The AS51900 is manufactured from steel with a galvanised finish.
Legacy product information describes the surface as hot-dip galvanised.
No current coating thickness is stated.
Satellite dishes up to Ø 90 cm according to product data
The available product data specifies suitability for satellite dishes up to approximately:
Ø 90 cm
This is a product application value and not a universal structural approval.
Actual loads also depend on:
antenna weight
wind area
lever arm
building height
local wind conditions
rafter condition
fixing hardware
Useful alternative to façade mounting
Where a building has an external thermal insulation system, direct wall mounting can require specialised stand-off fixings.
A suitable roof-rafter installation may avoid transferring the antenna load through the façade insulation.
The actual roof structure must nevertheless be suitable for the load.
Roof-overhang cladding is not automatically structural
Soffit boards, timber cladding, plastic panels or metal sheeting should not automatically be treated as load-bearing components.
The bracket should be fixed to a structurally suitable roof member.
Earthing terminal screw
The AS51900 includes an earthing terminal screw according to the available product data.
This provides a connection point only.
It does not by itself form a complete:
antenna earthing system
equipotential bonding system
lightning protection system
Cable routing still requires planning
Although no mast penetration through the roof covering may be required, coaxial cables must still be routed into the building through a suitable weather-protected cable path.
Other antenna applications
Depending on the complete mechanical design, the bracket may also be used for suitable:
DVB-T/T2 antennas
DAB/DAB+ antennas
FM antennas
radio antennas
Technical specifications
Article reference: AS51900
Article number: 51900
EAN: 4050822519002
Product type: Adjustable roof overhang antenna bracket
Material: Steel
Surface: Galvanised
Roof pitch adjustment: Approx. 26–54°
Satellite dish size: Up to Ø 90 cm according to product data
Installation: On a suitable roof rafter in the roof-overhang area
Earthing connection: Earthing terminal screw
Roof mast penetration: Not required in a suitable installation
Maximum structural load: Not separately specified
Package contents
1 × AS51900 roof-overhang antenna bracket
Mounting components according to product configuration
Satellite dish, LNB, mast or outrigger, coaxial cable, earthing conductor and substrate-specific fixing hardware are not included unless separately specified.