📑 Customized Solar Mounting Structure Specification

1) General Description

The solar PV mounting structure shall be a custom‑designed, hot‑dip galvanized steel structure to support framed PV modules at a fixed or adjustable tilt, suitable for rooftop or ground installation. The design must withstand site‑specific wind, seismic, and snow loads, and ensure long‑term durability in outdoor conditions.

2) Applicable Standards

The structure shall be designed, fabricated and tested according to the latest editions of applicable standards such as:

• ISO / IEC 62548: Design requirements for PV support structures

• ASCE 7: Minimum design loads for buildings and other structures

• ASTM A123 / A153: Hot‑dip galvanized coatings

• Local Building & Wind Codes: As per project location

3) Materials

3.1 Steel

• Primary Frame: Cold‑formed/rolled sections or SHS/CHS structural steel

• Material Grade: Minimum S235 / equivalent structural steel

• Finish: Hot‑dip galvanized with average coating thickness ≥ 80–100 µm

• Optional: Powder coating or epoxy primer for aggressive environments

3.2 Fasteners & Hardware

• Bolts, Nuts, Washers: Grade 8.8 or higher

• Material: Stainless steel (SS304/SS316) recommended for all external fasteners

• Clamps: PV module end & mid clamps compatible with panel frame thickness

3.3 Base / Anchors

• Roof Mount: Anchor bolts (mechanical/chemical) into concrete/tile structures

• Ground Mount: Concrete pads or driven piles as per geotechnical recommendation

4) Design Parameters

5) Structural Design Requirements

5.1 Load Criteria

The structure shall be designed to safely withstand:

• Dead loads (self‑weight + PV modules + hardware)

• Live loads (maintenance personnel)

• Wind loads per ASCE/Local code

• Snow loads (if applicable)

• Seismic loads per local seismic coefficients

5.2 Deflection Limits

Maximum deflection of any structural member shall not exceed L/180 under service load.

5.3 Connection Design

All connections shall be bolted. Welds (if any) must be continuous and performed by certified welders.

6) Fabrication & Finish

• All steel members shall be drilled and punched in workshop.

• Sharp edges and burrs shall be removed before galvanizing.

• After galvanizing, fittings must be assembled to ensure proper fit on site.

7) Installation Requirements

• Provide detailed shop drawings with dimensions and part numbers.

• Ensure correct anchor bolt layout for roof/ground.

• Modules to be installed only after frame inspection.

• Torque settings for bolts per manufacturer’s recommendation.

• Ensure drainage and no penetration of roof waterproofing membrane (use proper flashing/boots).