1.Excavate hole below finished installation level (including surfacing) with dimensions of 2180mm x 1280mm x 370mm.
2.To prevent flooding the foundations should be connected to a rainwater drainage system such as a storm drain or soakaway.
3.Install drainage inlet centrally in excavated area 170mm from finished ground level. This will allow for a slight fall in the concrete pad to encourage water run-off.
4.Lay a level compacted 100mm granular sub-base over a geo-textile. This will help to spread the load of the concrete installation pad.

370mm
100mm
270mm
170mm

Metric Conversion:
100mm/ 4”
170mm/ 6 11/16”
270mm/ 20
55/64”
370mm/ 14 9/16”
1280mm/ 50 25/64”
2180mm/ 85 53/64”
BS EN 1176
Ground Fixed
Piano Chimes
13 Notes 1 of 7
Ground Works Piano 13 Notes

5. Create timber shuttering on top of compacted sub-base with an internal area of 2020mm x 1120mm x 100mm.
•Note –finished height to top of shuttering should be 180mm below finished installation level (including surfacing).
•To ensure shuttering is square, internal diagonal measurements should be ~2310mm.
6. Install A142 steel reinforcing mesh (or similar) on 50mm plastic or steel supports or “chairs” to hold mesh vertically centered in shuttering area.
7. Install the supplied installation studs jig on top of steel mesh and center between shuttering and affix in place using cable ties (to ensure no movement when concrete is poured).
• Note –threaded studs must be covered when concrete is poured to ensure threads do not get concrete on them.
• Threads should protrude 30mm from top of shuttering.

TYPE 1 SUB BASE SHUTTERING 50mm CONCRETE ABOVE MESH 50mm CONCRETE BELOW MESH A142 MESH MIN 50mm COVER TOP & BOTTOM M10x80mm Studs 8.8 HT BZP fixed to Jig rests on mesh100mm
8. Pour 100mm depth concrete pad and create slight fall to previously fitted drainage inlet.
• Consider mixing reinforcement fibres in concrete mix predominantly for crack control rather than structural strengthening.
• Allow to poured concrete pad to cure for 24-72 hours before proceeding to next step.
• Remove shuttering after 24-72 hours.
Ground Works Piano 13 Notes
Metric Conversion:
100mm/ 8”
1120mm/ 443/32”
2020mm/ 79 17/32”
2310mm/ 90 15/16”

BS EN 1176
Ground Fixed
Piano Chimes
13 Notes 2 of 7

9.
Create timber shuttering onto concrete pad to cast concrete walls to create an internal area (after shuttering has been removed) of 1900mm x 1000mm x 170mm.
• Note –finished height to top of shuttering should be 10mm below finished installation level (including surfacing).
• To ensure shuttering is square, external diagonal measurements should be ~2147mm.

10. Pour concrete between shuttering to cast concrete walls and ensure walls are filled to top of shuttering and level.
• Consider mixing reinforcement fibres in concrete mix predominantly for crack control rather than structural strengthening.
• Remove shuttering after 24-72 hours.
11. Backfill with soil or aggregate around external walls.
12. We recommend allowing concrete to cure for a minimum of 1 week prior to installing Floor Piano.
170mm
270mm
Metric Conversion:
170mm/ 6 11/16”
270mm/ 10 5/8”
940mm/ 37 1/64”
1840mm/ 72 7/16”
2067mm/ 81 3/8”

BS EN 1176
Ground Fixed
Piano Chimes
13 Notes 3 of 7
Ground Works Piano 13 Notes

BS EN 1176
Ground Fixed
Piano Chimes
13 Notes 4 of 7
Ground Works Piano 13 Notes
13 Note Piano Plan Elevation
25 Note Piano Plan Elevation
78 13/16"
133 15/16"
43 15/32"
43 15/32"
Metric Conversion:
1104mm/ 43 15/32”
2002mm/ 78 13/16”

BS EN 1176
Ground Fixed
Piano Chimes
13 Notes 5 of 7
Install Piano 13 Notes
Using hoist bars lift piano with suitable lifting equipment into the pre fabricated concrete tub.
TYPE 1 SUB BASE
CONCRETE PAD WITH GROUND SURFACE
70MMx170MM SURROUND
HOIST POINT
HOIST POINT
HOIST POINT
HOIST POINT
HOIST BARS

BS EN 1176
Ground Fixed
Piano Chimes
13 Notes 6 of 7
Install Piano 13 Notes
Concrete
30mm of Stud Protruding
from concrete slab
M12x200mm Studs
M10 Nuts to attach Piano
Studs inserted into concrete base
Lower piano into the concrete tub, locate frame over protruding studding. Once located and level fix into place with M10 Nyloc
Nuts and washers, through the holes in frame and base plate.
TYPE 1 SUB BASE
CONCRETE PAD WITH GROUND SURFACE 70MMx170MM SURROUND

BS EN 1176
Ground Fixed
Piano Chimes
13 Notes 7 of 7
Install Piano 13 Notes
Once happy with piano installed, finally attach the checker plate surrounds with screws provided making sure clearance gaps are even all around the notes. Use Square washers to adjust height of tread plate according to surface levels.
TYPE 1 SUB BASE CONCRETE PAD WITH GROUND SURFACE
70MMx170MM SURROUND
M8x16 CSK SCREWS
CHECKER PLATE SURROUND