K2 mounting systems for flat roofs are suitable for many roof types such as concrete, bitumen, green roofs, gravel or trapezoidal sheet metal. Suitable for single and double elevations. The mounting angles range from 10° to 45°. We offer a market-leading 12-year warranty on all K2 system components.

1. www.k2-systems.com
Mounting systems for solar technology
FLAT ROOF SYSTEMS

2. 2

3. Contents
TT Comparison of flat roof systems 4
TT S-Rock 15° System 6
TT S-Dome 10° System 8
TT S-Dome Small System 10
TT Triangle / MultiAngle System 10 - 45° 12
TT D-Dome 10° System 14
TT Accessories 16
WARRANTY
We offer a 12-year warranty on all K2 system components.
k2-systems.com/en/guarantee
MODULE ORIENTATION
We offer flat roof systems with one-sided or two-sided
elevations.
STATICS AND DESIGN LOADS
K2 mounting systems fulfil the calculation principles in
accordance with Eurocode 1 and 9.
PALLET DELIVERY
Many K2 mounting systems are shipped completely as
palletised goods.
Prod
uct warra
nty·
·in
s
ystem alli
ance
12years
Suitable Unsuitable
Classic system
3
FLAT ROOFS
CONTENTS

4. S-ROCK 15°
TT One component with integrated ballast tray and
cable management solution
TT No additional pre-assembly
TT One clamp that can be used universally for all
modules
TT Optimal load transmission – statically proven and
tested in wind tunnel
S-DOME 10°
TT A system for structurally challenging roofs with limited ballast
options
TT Short rail system – cost-optimised for storage and transportation
TT Reliable system for all roof conditions
TT Aerodynamically optimised and tested in wind tunnel
TT Quick and easy handling – adapted to
construction site workflows
S-DOME SMALL 10°
TT For a roof inclination of up to 15° on trapezoidal
sheet metal
TT Economical in terms of materials and transportation;
clever connections and strong holding power
TT The perfect combination of the all-round MultiRail
component and load-optimised, slim elevations
4
Comparison of flat roof systems

5. TRIANGLE / MULTIANGLE 10 - 45°
TT Individually customisable elevation angle
TT Universal module orientation
TT High flexibility and customised solutions
D-DOME 10°
TT A system which provides optimal surface utilisation and yields for roofs
with limited ballasting options
TT Short rail system – cost-optimised for storage and transportation
TT Reliable system for all roof conditions
TT Aerodynamically optimised and tested in wind tunnel
TT Quick and easy handling – adapted construction site
workflows
5
FLAT ROOFS
COMPARISON OF FLAT ROOF SYSTEMS

6. TT One component with integrated ballast tray and cable
management solution
TT No additional pre-assembly
TT One universal clamp for all modules
TT Optimal load transmission – statically verified and tested in
wind tunnel
The integrated ballast tray eliminates
additional components.
6
S-Rock 15° System

7. TECHNICAL DATA
S-Rock 15°
Scope of application Flat roofs 5° with membrane and bitumen covering or concrete
Fastening type/roof fixture On-roof with potential ballast; no roof penetration
Requirements Permissible module dimensions (L x W x H): 1638 -1685 x 982 -1001 x 27 - 50 mm
Technical specifications TTThermal separation after 8 adjacent or consecutive modules
TTMinimum clearance to roof edge 700 mm (350 mm to other obstructions)
TTRow spacing, fixed: approx. 1.7 m
Inclination angle 15°
Material TTAluminium:
· S-Rock, Windbreaker (EN AW-5754 H22/H32)
· Module clamps (EN AW-6063 T66)
TTBuilding protection mat with or without aluminium lining (PUR-bound rubber
granules)
TTSmall parts: Stainless steel A2-70
Note: The illustration of the S-Rock 15° above (with a row spacing of 1.76 m) shows the dimensions for a shadow-free installation design at a lati-
tude of ≤ 48.8 °N. This design ensures that the modules (with a module width of up to 1 000 mm) are shade free at noon (12 pm) on 21 December.
Many best practice case examples have confirmed that in 80 % of customers surveyed, these dimensions achieve an optimum ratio between surface
utilisation and yield. That is why we have the S-Rock System in these dimensions in stock for you and available for delivery at all times.
Of course, upon request, we also provide all S-Rock 15° systems in your desired length for a row spacing of 1.76 m.
Larger row spacings are currently not available, as this would require a separate static design including an expert wind report.
953mm
805mm
1763mm
58mm
15°
Building protection mat
S-Rock 15° Front
First row module support
element with ballast tray
S-Rock 15°
Module support element
for one-sided elevation
with ballast tray
S-Rock 15° End
Last row module support
element for one-sided ele-
vation with ballast tray
Windbreaker 15°
Wind deflection on the rear
of S-Rock 15° systems
S-ROCK 15° SYSTEM COMPONENTS
S-Rock Connector Set
For connecting multiple
module blocks
7
FLAT ROOFS
S-ROCK 15° SYSTEM

8. 2.0
TT A system for structurally challenging roofs with limited ­ballast
options
TT Short rail system S-Dome 2.0 – cost-optimised for storage and
transportation
TT Reliable system for all roof conditions
TT Aerodynamically optimised and tested in wind tunnel
TT Quick and easy handling – adapted to construction site
workflows
Classic
S-Dome Classic can also be mounted
on trapezoidal sheet metal roofs.
8
S-Dome 10° System

9. 520mm 520mm880mm
max. 645mm
10°
51mm
Building
protection
mat
Dome S1000 and
Dome SD
TT Module support elements
for one-sided elevations
TT Suitable for module
widths of up to approx.
1 000 mm
SpeedRail with building
protection mats
TT SpeedRail available as
short or long rails
TT Laminated or unlami­
nated building protection
mats, depending on roof
covering material
Windbreaker
TT Wind deflection on the
rear of Dome systems
TT Various lengths available
Block Connector RW/CW
TT Connection between
module arrays in x- and
y-direction
TT Ballast reduction in the
complete system
TECHNICAL DATA
S-Dome 2.0 / Classic
Scope of application Flat roofs 5° with membrane and bitumen covering or concrete; also trapezoidal
sheet metal roofs for S-Dome classic
Fastening type/roof fixture Stable, with ballasting if necessary; no roof penetration
Requirements TTPermissible module dimensions (L x W x H): 1550 - 1700 x 950 -1100 x 30 - 50 mm
TTMinimum system size: one row x 3 modules
TTRoof inclination of up to 5°
Technical specifications TTThermal separation after max. 13.5 m: min. 30 mm to max. 150 mm
TTS-Dome 2.0: Modules and mounting system are assembled simultaneously
Inclination angle 10°
Material TTMounting rails, S-Dome, Dome SD, Windbreaker, module clamps, rail connectors:
Aluminium EN AW-6063 T66
TTBuilding protection mat with or without aluminium lining (PUR-bound rubber
granules)
TTSmall parts: Stainless steel (1.4301) A2-70
S-DOME 10° SYSTEM COMPONENTS
Porter for ballasting
TT Various components for ballasting of flat roof systems
TT Solutions for all ballast requirements
9
FLAT ROOFS
S-DOME 10° SYSTEM

10. TT For a roof inclination of up to 15° on trapezoidal sheet metal
TT Economical in terms of materials and transportation; clever
connections and strong holding power
TT The perfect combination of the all-round MultiRail component
and load-optimised, slim elevations
10
S-Dome Small System

11. TECHNICAL DATA
S-Dome Small
Scope of application Flat or pitched roofs ≤ 15° with trapezoidal sheet metal roofing
Fastening type / roof fixture Attached with drilling screws in trapezoidal sheets, parallel to raised crests
Requirements TTSheet thickness for aluminium/steel: min. 0.5 mm
TTTensile strength for aluminium: 165 N/mm²
TTTensile strength for steel: according to approval min. S235 in acc. w/ DIN EN 10025-1
TTCrest width: min. 22 mm
TTCrest spacing: independent of crest distance
Technical specifications Thermal separation after a max. of 13.5 m: min. 30 mm to max. 150 mm
Inclination angle 10°
Material TTMounting rails, Dome SD Small, Dome S1000 Small, FlexClamp Small:
Aluminium (EN AW-6063 T66/ EN AW-6082 T6); EPDM
TTSmall parts: Stainless steel (1.4301) A2
250mm 250mm
285mm
117mm
950-1050mm 10°
S-DOME SMALL COMPONENTS
Dome S1000 Small
Narrow elevation module
support element
Dome SD Small
Narrow module support
element
MultiRail 25 or 25/3
TT Length 250 mm
TT 25: For roofs with an
inclination 15°
TT 25/3: With three bore-
holes for roofs with 15°
inclination
FlexClamp Small
TT Module clamp specifically
for S-Dome Small
TT Height adjustable
TT For clamping on the long
side of module
11
FLAT AND PITCHED ROOFS
S-DOME SMALL SYSTEM

12. TT Individually customisable elevation angle
TT Universal module orientation
TT High flexibility and customised solutions
12
Triangle / MultiAngle System 10 - 45°

13. TECHNICAL DATA
Triangle / MultiAngle
Scope of application Flat roofs, fields, or ground
Fastening type/roof fixture Fastening or ballasting
Technical specifications Thermal separation after max. 24.4 m
Inclination angle 10 - 45°, factory-default, or individually adjustable with MultiAngle
Material TTMounting rails, module clamps: Aluminium (EN AW-6063 T66/ EN AW-6082 T6)
TTPE sheets
TTSmall parts: Stainless steel (1.4301) A2
Mounting rails
TT Triangle: SolidRail
TT MultiAngle: SingleRail
Base assembly
TT Triangle: L-Profile
TT MultiAngle: SpeedRail or
L-Profile
Module orientation
TT Triangle: Landscape
mounting with AddOn
TT MultiAngle: Portrait
mounting, 2 heights
for landscape mounting
(clamps at corners or with
AddOn)
Elevation
TT Triangle: Available with
10 - 45°
TT MultiAngle: Individually
customisable, 10 - 45°
TRIANGLE / MULTIANGLE SYSTEM COMPONENTS
10-45°
10-45°
M
odule
position
Module portraitModule landscape
13
FLAT ROOFS
TRIANGLE / MULTIANGLE SYSTEM

14. TT A system which provides optimal surface utilisation for roofs
with limited ballast options
TT Short rail system – cost-optimised for storage and transportation
TT Aerodynamically optimised and tested in wind tunnel
TT Quick and easy handling – adapted to construction site
workflows
TT Reliable system for all roof conditions
2.0
Classic
Dome Classic can also be mounted on
trapezoidal sheet metal roofs.
14
D-Dome 10° System

15. TECHNICAL DATA
D-Dome 2.0 / Classic
Scope of application Flat roofs 5° with membrane and bitumen covering or concrete
Fastening type/roof fixture Stable, with ballasting if necessary; no roof penetration
Requirements TTPermissible module dimensions (L x W x H): 1550 -2000 x 950 -1100 x 30 - 50 mm
TTMinimum system size: one row x 3 modules
TTRoof inclination of up to 5°
Technical specifications TTThermal separation after max. 13.5 m: min. 30 mm to max. 150 mm
TTMinimum clearance to roof edge 500 mm (350 mm to other obstructions)
Inclination angle 10°
Material TTMounting rails, D-Dome, Dome SD, Module Clamps,
Rail Connectors: Aluminium EN AW-6063 T66
TTBuilding protection mat with or without aluminium lining (PUR-bound
rubber ­granules)
TTSmall parts: Stainless steel (1.4301) A2-70
10°
520mm 520mm
81mm
51mm
Building
protection mat
DOME 10° SYSTEM COMPONENTS
Dome D1000 and
Dome SD
Narrow elevation mod-
ule support element for
two-sided elevations
SpeedRail with building
protection mats
TT SpeedRail available as
short or long rails
TT Laminated or unlami­
nated building protection
mats, depending on
­material of roof covering
Block Connector RW/CW
TT Connection between
module arrays in x- and
y-direction
TT Ballast reduction in the
complete system
Porter for ballasting
TT Various components for
ballasting of flat roof
systems
TT Solutions for all ballasting
requirements
15
FLAT ROOFS
D-DOME 10° SYSTEM

16. TT Module clamps 16
TT Self-tapping hexagon screw with sealing washer 18
TT T-bolt and flange nuts with serration 18
TT MK2 slot nuts with assembly clip 18
TT Screw anchor, Multi Monti 18
TT Washer 19
TT Lightning protection clamp, Multi half-piece 19
TT TerraGrif equipotential bonding 19
TT Cable clips 19
MODULE CLAMPS
Our module clamps can be easily mounted to any K2
rail. The MK2 slot nut automatically locks in place
and can be moved about in the rail by pressing the
cylinder screw lightly.
Module middle clamps
Module frame height / description Item number
30 - 33 mm / M8x30, aluminium mill finish 1005154
34 - 38 mm / M8x30, aluminium mill finish 1005148
34 - 38 mm / M8x30, black anodised 1005150
39 - 44 mm / M8x35, aluminium mill finish 1004197
39 - 44 mm / M8x35, black anodised 1005151
45 - 48 mm / M8x40, aluminium mill finish 1005146
45 - 48 mm / M8x40, black anodised 1005152
49 - 50 mm / M8x45, aluminium mill finish 1005149
49 - 50 mm / M8x45, black anodised 1005153
16
Accessories

17. Module end clamps
Module frame height / description Item number
30 - 31 mm / M8x30, aluminium mill finish 1005345
32 - 33 mm / M8x30, aluminium mill finish 1005344
34 - 36 mm / M8x30, aluminium mill finish 1005169
34 - 36 mm / M8x30, black anodised 1005268
37 - 38 mm / M8x30, aluminium mill finish 1005290
37 - 38 mm / M8x30, black anodised 1005293
39 - 41 mm / M8x35, aluminium mill finish 1005170
39 - 41 mm / M8x35, black anodised 1005269
42 - 44 mm / M8x35, aluminium mill finish 1005291
42 - 44 mm / M8x35, black anodised 1005295
45 - 47 mm / M8x40, aluminium mill finish 1005171
45 - 47 mm / M8x40, black anodised 1005270
48 mm / M8x40, aluminium mill finish 1005292
48 mm / M8x40, black anodised 1005296
49 - 50 mm / M8x45, aluminium mill finish 1005172
49 - 50 mm / M8x45, black anodised 1005271
Module middle clamps XS
Module frame height / description Item number
30 - 33 mm / M8x50, aluminium mill finish 1005156
34 - 38 mm / M8x55, aluminium mill finish 1003586
34 - 38 mm / M8x55, black anodised 1005158
39 - 44 mm / M8x60, aluminium mill finish 1004908
39 - 44 mm / M8x60, black anodised 1005159
45 - 48 mm / M8x65, aluminium mill finish 1005143
45 - 48 mm / M8x65, black anodised 1005160
49 - 50 mm / M8x70, aluminium mill finish 1004407
49 - 50 mm / M8x70, black anodised 1005161
Module clamps for laminate modules
Module middle clamps for fastening laminate mod-
ules; approved for First Solar and Calyxo thin-film
modules; small module spacing.
Material: Aluminium mill finish, EPDM
Please note: For additional anti-slip protection the K2
Slideguard is suitable for vertical mounting of lami-
nate modules with a glass thickness of 6-9 mm.
Material: Stainless steel 1.4016, EPDM
Type / accessory Item number
Module middle clamp 1003157
Module end clamp 1003158
Slideguard 1005828
17
FLAT ROOFS
ACCESSORIES

18. SELF-TAPPING SCREW WITH SEALING
WASHER
Thin sheet screw, chip-free; approved for steel/
aluminium sheets with a minimum thickness of
0.5/0.7 mm.
Material: Stainless steel A2, EPDM
Type Item number
6 x 25 mm, SW 8, sealing washer Ø 16 mm 1005207
6 x 38 mm, SW 8, sealing washer Ø 16 mm 1005193
T-BOLT AND FLANGE NUTS WITH SERRATION
T-bolt for use in the lower chamber of K2 SolidRail
rails.
Head form: 28/15
Head dimensions: 22.5 x 10.5 x 4 mm
Material: Stainless steel A2 1.4301
Type Item number
M10x20 1000637
M10x30 1000041
M8x20 1000614
M8x30 1000368
The serrated nut (similar to ISO 4161) ­prevents it
from loosening.
Material: Stainless steel A2
Type Item number
M8 1000043
M10 1000042
MK2 SLOT NUTS WITH ASSEMBLY CLIP
The MK2 slot nuts can be used at any point on the K2
rails. They automatically lock in place. Subsequently,
they can easily be moved about in the rail by
pressing them lightly.
Material:
Stainless steel 1.4301, PA
Item number:
1001643
SCREW ANCHOR, MULTI MONTI
Multi Monti screw anchor (Heco) for fastening to
concrete; min. borehole depth 55 mm. Steel
surface: galvanised and blue passivated, head
diameter 17 mm, nominal bore diameter 6 mm
Material: Stainless steel A4 or galvanised steel,
matches TX 30 screwdrivers
Type: 7.5 x 50 mm
Item number: 1000802
18
Accessories

19. LIGHTNING PROTECTION CLAMP, MULTI HALF-PIECE
Lightning protection clamp for clamping lightning
protection cables with Ø 8 mm. For universal use as
Tee, cross, parallel and impact clamps.
Material: Aluminium
Item number 1003151
Additional supplies for T-bolt groove;
TT 1 T-bolt M10x30 (1000041), stainless steel A2
TT 1 serrated nut M10 (1000042), stainless steel A2
Additional supplies for rail head chamber:
TT 1 MK2 slot nut with assembly clip (1001643), stain-
less steel, PA
TT 1 Allen bolt M8x30 (1000086), stainless steel A2
TT 1 K2 washer 8.4x20x1.2 mm (1000122), stainless
steel
TERRAGRIF EQUIPONTENTIAL BONDING
Potential equalisation between module and rail.
Material: Stainless steel
Type Item number
TerraGrif K2PA 32 Landscape 2000055
TerraGrif U17 Portrait 2000056
TerraGrif K2SZ Landscape/Portrait 2001881 K2PA K2SZ
CABLE CLIPS
Type Item number
Omega Cable Clip
Suitable for CrossRail, SingleRail, SolidRail,
S-Rock; 4 cables with Ø 6 mm
Material: Polypropylene with UV stabiliser
1005394
Cable Routing Clip
Suitable for clamping in module frames with
a thickness of 1.5 - 2.5 mm and S-Rock
4 cables with Ø 6 mm
Material: Spring steel
2002322
Dome Wire Hanger
Suitable for S-Dome and D-Dome
1 cable with Ø 6 mm
Material: Stainless steel (1.4310)
2002324
Omega
Cable Clip
Cable Routing
Clip
Dome Wire
Hanger
WASHER
Safety mechanism for installing S-Dome Windbreakers.
Material: Stainless steel A2
Item number: 1000273
U17
19
FLAT ROOFS
ACCESSORIES

20. Mounting systems for solar technology
Flat Roof Systems Product Brochure EN V1 | 0916 · Subject to change · Product illustrations are exemplary and may differ
from the original.
K2 Systems GmbH
Industriestraße 18
71272 Renningen
Germany
Tel. +49 (0) 7159 - 42059 - 0
Fax +49 (0) 7159 - 42059 - 177
info@k2-systems.com
www.k2-systems.com
OTHER K2 SYSTEMS
TT Pitched roof systems
TT Ground mounted systems