Single-row solar carport with hills behind it on a sunny day

Solar carports · Semi-cantilever

LETO. One row of parking.

The LETO is the workhorse for single rows along a property line, a drive aisle, or the edge of a lot. Columns sit at the back of the stall, so the full stall depth stays clear and the canopy reaches over the parked car. Rows join end to end to shade any length of parking.

At a glance

LETO: l-shape, double column, single cantilever.

System
LETO
Geometry
L-shape, double column, single cantilever
Covers
One row of parking, two spaces (18 ft) per bay, repeatable side by side
Steel
10 ga galvanized box steel, or HSS A36 (primed, galvanized, or hot-dip)
Tilt
0°, 5°, or 10°
Clearance
8 ft 6 in to 15 ft
Foundations
Caisson or spread footing, in-ground or on a parking structure

Best for

  • Perimeter rows of surface lots
  • Multifamily and workplace parking
  • Dealership display and inventory rows
  • Lots where the drive aisle must stay column-free
Dimensioned diagram of a semi-cantilever carport showing clearance and span
Dimensioned bay, manufacturer diagram
Isometric drawing of a semi-cantilever carport system
Isometric, manufacturer drawing

Specifications

Manufacturer-published values for both steel systems.

Project engineering is site-specific: wind exposure, seismic category, soil, and module selection set the final member sizes and footing design.

Galvanized box steel system

Columns
10 gauge galvanized box steel
Beams
10 gauge galvanized box steel
Purlins
Galvanized or plain steel, slide-in solar purlins
Finish
G90 galvanized, no painting required
Tilt
0° or 10° (5° available)
Connections
Bolted, no field welding, no welding inspections

HSS structural steel system

Columns
HSS, ASTM A36 grade
Beams
HSS, ASTM A36 grade
Purlins
16 gauge AISI cold-rolled G90 galvanized steel
Finish
Primed, hot-dip galvanized, or standard galvanized
Tilt
Fixed slope up to 10°
Connections
Bolted, direct-tension indicators

Common to both systems

Wind
Modular designs rated to 110 mph
Code basis
ASCE 7 wind and seismic loads, engineered per jurisdiction
Clearance
8 ft 6 in to 15 ft under the beam
Foundations
Reinforced concrete caisson or spread footing, 2,500 psi minimum, all soil types
Mounting
In-ground lots or on parking structures
Modules
Compatible with any framed PV module
Listing
UL 2703 listed racking system
Engineering
Complete engineering resources and pre-stamped certified letters; designs available in all 50 states
Warranty
Manufacturer limited warranty on the structure, with a design life beyond 20 years