Solar Mounting Systems
4
4. Determine the Maximum Rail Support Spacing
Please use the following table to determine the base rail support spacing for Tilt kit installations to
metal sheet roof.
* Each row of solar panels shall have minimum of two rows of railing fixed to the roof framing.
* The spacing of the rail fixing shall not exceed the recommended spacing, and shall be reduced to
match the location of the roof rafter.
The table below is based on solar modules length of 1600-1960mm
：
Spacing (mm) of Tilt kit for angle of Tilt 15deg
Installation
Region A & B
Region C & D
Height
Spacing(mm)
Spacing(mm)
5 Meters
700
390
10 Meters
590
350
15 Meters
535
310
20 Meters
505
280
The table below is based on solar modules length of 1600-1960mm:
Spacing (mm) of Tilt kit for angle of Tilt 30deg
Installation
Region A & B
Region C & D
Height
Spacing(mm)
Spacing(mm)
5 Meters
555
310
10 Meters
460
280
15 Meters
415
240
20 Meters
390
220
The table below is based on solar modules length of 1600-1960mm:
Spacing (mm) of Tilt kit for angle of Tilt 60deg
Installation
Region A & B
Region C & D
Height
Spacing(mm)
Spacing(mm)
5 Meters
875
430
10 Meters
720
390
15 Meters
650
340
20 Meters
615
300
The Tilt kit hooks should be fixed to the purlin using two gauge 14 screws minimum.
the screws used to attach the railing to the roof framing shall conform to AS3566, ISO3506.1
The Cold formed steel purlins to support railing shall have minium base material thickness 1.2mm
in Regions A&B, and 1.9mm in regions C&D.
