Mounting Hardware
AGL Base Plate for Airfield Mounting Assemblies
A stable interface between mounting assemblies and the supporting structure
Base plates give selected airfield lighting and equipment mounting arrangements a defined bolted or fixed connection to the supporting airfield structure, configured to match the equipment and foundation arrangement.
Supplied by Precision AGL Solutions
Product Overview
AGL Base Plate
What It Is
Base plates provide a stable mechanical interface between mounting assemblies and the supporting airfield structure, for selected airfield lighting and equipment mounting arrangements where a defined bolted or fixed connection is required.
Key Features
- Stable mounting interface
- Project-specific dimensions and thicknesses
- Configurable bolt and hole patterns
- Integrates with compatible mounting stems and support assemblies
- Material selected for application and environment
- Supports new installations and selected retrofits
- Configurable to match equipment and foundation
Applications
Compatible Mounting and Support Arrangements
Elevated lightingElevated airfield lighting installations.
Mounting stemsMounting stem assemblies.
Extension stemsExtension stem arrangements.
Equipment supportsAirfield equipment support structures.
ReplacementReplacement and refurbishment projects.
Foundation interfaceInstallations requiring a defined foundation interface.
Technical Data
Specification Overview
| Parameter | Specification |
|---|---|
| Plate dimensions | Project and equipment dependent |
| Material | Selected according to application |
| Thickness | Structural and project dependent |
| Bolt pattern | Selected to suit foundation and equipment |
| Hole configuration | Project specific |
| Mounting interface | Compatible equipment dependent |
| Finish / coating | Selected according to environmental requirements |
| Installation | Foundation and project dependent |
Mounting Interface
Transition to the Supporting Structure
Role
The base plate is the transition between the mounting assembly and the supporting structure. Select plate dimensions, fixing pattern and hole configuration together with the supported equipment and foundation arrangement.
Benefit
Correct interface selection helps the assembly be installed securely and positioned as required.
Mounting Stem Compatibility
Confirm the Plate-to-Stem Connection
Confirm
- Bolt or thread arrangement, plate dimensions
- Stem diameter, hole spacing
- Required fixture position, structural requirements
Principle
Plates may be used with compatible mounting stems or extension stems. Review the complete mounting assembly before procurement.
Foundation Interface
A Coordinated Assembly
Important Considerations
- Foundation dimensions, anchor-bolt arrangement, bolt spacing
- Plate thickness, equipment loads
- Installation level, finished surface level
- Environmental exposure
Principle
Design or select the foundation and plate together. The final fixing arrangement should follow the approved project design.
Hole & Bolt Configuration
Determined by Equipment and Structure
Configuration
Hole locations and bolt patterns follow the equipment and supporting structure. Project-specific hole configurations can accommodate compatible mounting assemblies.
Existing Foundations
Measure existing foundations before selecting a replacement plate to confirm it matches the available anchor arrangement.
Material & Environmental Protection
Matched to the Installation Environment
Considerations
- Exposure to moisture, temperature variation, corrosion
- Other local environmental conditions
- Galvanic compatibility between plate, anchors, fasteners and stem (for example aluminium with steel)
Compatibility
The finish should suit the surrounding airfield infrastructure and connected mounting components.
Installation Considerations
Confirm Before Installation
Confirm
- Plate dimensions, material and thickness
- Bolt pattern, hole configuration, anchor-bolt compatibility
- Mounting-stem interface, required equipment orientation
- Finished installation level, foundation condition
Principle
Install on a suitable, stable foundation with the required fixing arrangement.
Replacement & Retrofit
Where Existing Mounting Infrastructure Needs Replacement
Provide for Retrofit
- Existing plate dimensions
- Anchor-bolt pattern
- Supported fixture type
- Foundation details
Purpose
This lets compatibility be assessed before manufacture or procurement.
Inspection & Maintenance
Periodic Inspection
Inspect For
- Corrosion or coating deterioration, loose fixing hardware
- Cracking or deformation, damage around fixing holes
- Foundation deterioration
- Misalignment of the supported mounting assembly
Action
Assess and correct any condition affecting the stability or alignment of the mounted equipment.
Frangibility & Loads
The Plate Must Not Defeat the Breakaway Design
Frangibility
For elevated lights, PAPI units and other equipment on the movement area, ICAO Annex 14 requires equipment to be frangible and mounted as low as possible. The base plate is part of the rigid foundation: it, its anchors and any bolt heads must not project above the designed breakaway (frangible) point, so keep them at or below the finished surface level shown on the certified assembly drawing, and the plate must not stiffen or bypass the frangible coupling.
Frangibility is established for the complete certified assembly (fixture, coupling, stem and base). Confirm it against the equipment manufacturer's frangibility documentation.
Loads
Design the plate, anchors and foundation for equipment weight, wind and jet-blast loading and any maintenance loads set by the project. They must hold the equipment in service without restricting the breakaway behaviour built into the frangible coupling.
Standards & Project Requirements
Established From Actual Conditions
Principle
Follow applicable airfield equipment, structural, foundation and project requirements. Establish dimensions, thickness, fixing pattern and material from the actual equipment and installation conditions.
Complete Assembly
Where the plate is part of an elevated-light mounting assembly, confirm compatibility between plate, stem, base, coupling and fixture as a complete system.
Depending on the project, references may include
- ICAO Annex 14 Vol. I — Chapter 5 (visual aids) and Chapter 9 (siting of equipment and installations on operational areas)
- ICAO Aerodrome Design Manual (Doc 9157) Part 6 — Frangibility
- FAA AC 150/5340-30J — Design and Installation Details for Airport Visual Aids
- FAA AC 150/5345-42K — Airport Light Bases, Transformer Housings, Junction Boxes, and Accessories
- FAA AC 150/5345-46F — Runway and Taxiway Light Fixtures (certified mounting methods)
Confirm the current edition of each reference before use.
FAQ
AGL Base Plate — Frequently Asked Questions
What is an AGL base plate?
A base plate provides a stable mechanical interface between mounting assemblies and the supporting airfield structure. It is used for selected airfield lighting and equipment mounting arrangements where a defined bolted or fixed connection is required, and it is configured to match the equipment and foundation arrangement.
Where are AGL base plates used?
They are used with elevated airfield lighting installations, mounting stem assemblies, extension stem arrangements, airfield equipment support structures, replacement and refurbishment projects, and any installation that needs a defined foundation interface.
How is a base plate selected?
Plate dimensions, material, thickness, bolt pattern and hole configuration all depend on the supported equipment and the foundation. Select the plate dimensions, fixing pattern and hole configuration together with the supported equipment and foundation arrangement, and establish them from the actual equipment and installation conditions. The final fixing arrangement should follow the approved project design.
How does a base plate connect to a mounting stem or extension stem?
Plates may be used with compatible mounting stems or extension stems. Confirm the bolt or thread arrangement, plate dimensions, stem diameter, hole spacing, required fixture position and structural requirements, and review the complete mounting assembly before procurement.
What foundation details matter when choosing a plate?
Consider the foundation dimensions, anchor-bolt arrangement and bolt spacing, plate thickness, equipment loads, installation level and finished surface level, and environmental exposure. The foundation and plate should be designed or selected together. For an existing foundation, measure it before selecting a replacement plate to confirm it matches the available anchor arrangement.
Does a base plate affect frangibility?
It can. For elevated lights, PAPI units and other equipment on the movement area, ICAO Annex 14 requires equipment to be frangible and mounted as low as possible. The base plate is part of the rigid foundation, so it, its anchors and any bolt heads must not project above the designed breakaway point. Keep them at or below the finished surface level shown on the certified assembly drawing, and the plate must not stiffen or bypass the frangible coupling. Frangibility is established for the complete certified assembly and should be confirmed against the equipment manufacturer’s documentation.
What loads should a base plate and its foundation be designed for?
Design the plate, anchors and foundation for the equipment weight, wind and jet-blast loading and any maintenance loads set by the project. They must hold the equipment in service without restricting the breakaway behaviour built into the frangible coupling.
What material and finish should be used?
Material is selected for the application and environment, considering moisture, temperature variation, corrosion and other local conditions. Galvanic compatibility between the plate, anchors, fasteners and stem should also be checked, for example aluminium with steel. The finish should suit the surrounding airfield infrastructure and the connected mounting components.
What information is needed for a replacement or retrofit base plate?
Provide the existing plate dimensions, the anchor-bolt pattern, the supported fixture type and the foundation details. This lets compatibility be assessed before manufacture or procurement.
How should base plates be inspected?
Inspect for corrosion or coating deterioration, loose fixing hardware, cracking or deformation, damage around fixing holes, foundation deterioration and misalignment of the supported mounting assembly. Any condition affecting the stability or alignment of the mounted equipment should be assessed and corrected.
Which standards and references apply to base plates?
Follow the applicable airfield equipment, structural, foundation and project requirements. References may include ICAO Annex 14 Vol. I Chapter 5 and Chapter 9, ICAO Doc 9157 Part 6 on frangibility, FAA AC 150/5340-30J, FAA AC 150/5345-42K and FAA AC 150/5345-46F on certified mounting methods. Where the plate is part of an elevated-light mounting assembly, confirm compatibility between plate, stem, base, coupling and fixture as a complete system, and confirm the current edition of each reference.
Procurement Information for Indian Projects
Indian public tenders commonly ask for the documents below. State which ones your tender requires when you send the enquiry, so they are covered in the quotation.
- Manufacturer / OEM authorisation
- Country of origin and local-content declaration (for Make in India purchase preference)
- Type-test and routine-test certificates, and the FAA / ICAO / IEC compliance documents named in the specification
- Datasheets, drawings and installation instructions
- Warranty, delivery period and spares support
- GeM catalogue or tender-portal requirements, where applicable
Request Base Plate Selection
Precision AGL Solutions can support base-plate selection based on the fixture type, mounting assembly, foundation arrangement, dimensions, bolt pattern and environmental requirements. Send fixture and foundation details for selection.
- Emailprecisionaglsolutions@gmail.com
- Websiterahulsharmaagl.in
- LinkedInPrecision AGL Solutions
- Phone+91 98214 96412
Product Disclaimer
Product availability, configuration, dimensions, electrical characteristics, photometric performance, certifications and compliance status depend on the selected manufacturer and project specification. The technical values published on this page should not be treated as a substitute for the manufacturer's current approved Technical Data Sheet.
Final selection shall be based on the approved project specification, applicable aviation standards, authority requirements, manufacturer documentation and site conditions. Use of this page is also subject to the Legal Notice, Disclaimer & Terms of Use.
Standards and editions referenced on this site are listed on the Standards Reference page.