Engineering workspace

Digital twin, bill of materials, build plan and validation

The engineering definition of record. Part list with references and assembly order, BOM with reclaimed versus new sourcing and price bands, hours per build step, the test programme, tolerances, failure modes and the disassembly route.

BOM lines

0 reclaimed or recycled

BOM cost band

Estimated

£0–£0

Supplier indications, not signed prices

Build time

0.0 h

Two people, flat-pack, no site power

Design life

Estimated

25 years

Recycled-polymer structure specification

Bill of materials

Reclaimed and recycled sourcing shown per line

No BOM lines seeded for this variant yet, the shared platform lines apply.

Build guide

0.0 hours total, two people

Test and validation plan

No records

Tolerance table

Moulded leg overall height

Nominal: 760 mm
Tolerance: ±2.0 mm
Why it matters: Seat height and level across a run

Canopy pitch

Nominal: 10°
Tolerance: ±0.5°
Why it matters: Rear drainage and yield consistency

Panel clamp spacing

Nominal: 1,100 mm
Tolerance: ±1.5 mm
Why it matters: Module frame clamp zone compliance

Table top width

Nominal: 750 mm
Tolerance: ±3.0 mm
Why it matters: Plank gap tolerance absorbs reclaimed variation

Plank drainage gap

Nominal: 4 mm
Tolerance: +2 / −1 mm
Why it matters: Drainage without trapping debris

Enclosure seal face flatness

Nominal: 0 mm
Tolerance: 0.4 mm
Why it matters: IP65 retention

Bolt torque, structural

Nominal: 22 Nm
Tolerance: ±2 Nm
Why it matters: Polymer creep limit

Bolt torque, panel clamp

Nominal: 16 Nm
Tolerance: ±1 Nm
Why it matters: Glass and frame protection

Feature	Nominal	Tolerance	Why it matters
Moulded leg overall height	760 mm	±2.0 mm	Seat height and level across a run
Canopy pitch	10°	±0.5°	Rear drainage and yield consistency
Panel clamp spacing	1,100 mm	±1.5 mm	Module frame clamp zone compliance
Table top width	750 mm	±3.0 mm	Plank gap tolerance absorbs reclaimed variation
Plank drainage gap	4 mm	+2 / −1 mm	Drainage without trapping debris
Enclosure seal face flatness	0 mm	0.4 mm	IP65 retention
Bolt torque, structural	22 Nm	±2 Nm	Polymer creep limit
Bolt torque, panel clamp	16 Nm	±1 Nm	Glass and frame protection

Failure-mode register

No records

End-of-life and disassembly plan

Moulded polymer frame, masts, spars, enclosure

Disassembly and route: Re-granulate into new mouldings
Recycled / reclaimed content: 100% recycled polymer in, recyclable out

Reclaimed timber bearers, seats, table

Disassembly and route: Re-use, then biomass at true end of life
Recycled / reclaimed content: 100% reclaimed

Reclaimed PV modules

Disassembly and route: Second life here, then PV recycling stream
Recycled / reclaimed content: 100% reclaimed

LiFePO4 pack

Disassembly and route: Return to battery producer compliance scheme
Recycled / reclaimed content: New component, take-back scheme

Electronics, ports, LED, mesh node

Disassembly and route: WEEE stream, plates and node field-replaceable first
Recycled / reclaimed content: New component, repairable

Stainless fixings

Disassembly and route: Metals recycling
Recycled / reclaimed content: New component, fully recyclable

Assembly	Disassembly and route	Recycled / reclaimed content
Moulded polymer frame, masts, spars, enclosure	Re-granulate into new mouldings	100% recycled polymer in, recyclable out
Reclaimed timber bearers, seats, table	Re-use, then biomass at true end of life	100% reclaimed
Reclaimed PV modules	Second life here, then PV recycling stream	100% reclaimed
LiFePO4 pack	Return to battery producer compliance scheme	New component, take-back scheme
Electronics, ports, LED, mesh node	WEEE stream, plates and node field-replaceable first	New component, repairable
Stainless fixings	Metals recycling	New component, fully recyclable

Recycled and reclaimed content by mass is modelled at 78% from the BOM mass model. Verification requires a weighed production unit.

Estimated

Specified engineering parameters

The design cases, standards and validation programme this product is built and quoted against.

Canopy wind uplift design case

Value in use: 0.68 kN/m2 net uplift, survival to 31 m/s gust, ballast 240 kg per canopy pair
Method: BS EN 1991-1-4 terrain category IV at 10 m, Manchester basic wind velocity 22.5 m/s, canopy area 3.2 m2, uplift coefficient 0.9, ballast sized for 1.5x overturning reserve.
If it moves: A one-category terrain change lifts required ballast to 300 kg and adds 9 kg of recycled aggregate per unit, about 4 GBP of cost.

Seat and bearer load case

Value in use: 3.0 kN per metre distributed, 2.5 kN point load at mid-span, 12 mm maximum deflection
Method: BS EN 1176 style public-realm seating case with four 100 kg occupants per 2 m bearer, deflection limited to span/150 on the hemp-plastic profile.
If it moves: Tightening deflection to span/200 requires an 8 mm steel spine and adds roughly 26 GBP per bench.

Vandal and theft resistance specification

Value in use: IK08 enclosures, M10 shear-nut fixings, socket faces to IP66 with lockable flap, module frame captive-bolted from inside the seat void
Method: Street-furniture practice mapped onto BS EN 62262 impact classes, then rated against the four failure modes that carry the highest severity score on the risk register.
If it moves: Moving to IK10 and anti-drill barrel locks costs about 38 GBP per bench and adds two minutes to assembly.

Third-party validation programme

Value in use: Four tests, 11,400 GBP, eight weeks: wind uplift rig, seat fatigue to 100,000 cycles, impact to IK08, electrical safety of the charge assembly
Method: Priced from published UKAS test-house rate cards for comparable street-furniture programmes, sequenced against the first production frame.
If it moves: A re-test on one line adds 2,800 GBP and three weeks; the programme is inside the pilot phase budget either way.

Parameter	Value in use	Method	If it moves
Canopy wind uplift design case	0.68 kN/m2 net uplift, survival to 31 m/s gust, ballast 240 kg per canopy pair	BS EN 1991-1-4 terrain category IV at 10 m, Manchester basic wind velocity 22.5 m/s, canopy area 3.2 m2, uplift coefficient 0.9, ballast sized for 1.5x overturning reserve.	A one-category terrain change lifts required ballast to 300 kg and adds 9 kg of recycled aggregate per unit, about 4 GBP of cost.
Seat and bearer load case	3.0 kN per metre distributed, 2.5 kN point load at mid-span, 12 mm maximum deflection	BS EN 1176 style public-realm seating case with four 100 kg occupants per 2 m bearer, deflection limited to span/150 on the hemp-plastic profile.	Tightening deflection to span/200 requires an 8 mm steel spine and adds roughly 26 GBP per bench.
Vandal and theft resistance specification	IK08 enclosures, M10 shear-nut fixings, socket faces to IP66 with lockable flap, module frame captive-bolted from inside the seat void	Street-furniture practice mapped onto BS EN 62262 impact classes, then rated against the four failure modes that carry the highest severity score on the risk register.	Moving to IK10 and anti-drill barrel locks costs about 38 GBP per bench and adds two minutes to assembly.
Third-party validation programme	Four tests, 11,400 GBP, eight weeks: wind uplift rig, seat fatigue to 100,000 cycles, impact to IK08, electrical safety of the charge assembly	Priced from published UKAS test-house rate cards for comparable street-furniture programmes, sequenced against the first production frame.	A re-test on one line adds 2,800 GBP and three weeks; the programme is inside the pilot phase budget either way.

Modelled