SOAKAWAYS AND FLOODING RISK – SLOPING SITES

Ground water around the soakaway could cause vaults to flood!!

Install a land-drain to prevent flooding of soakaway area.

700

900

1150

Hand clean

800

150

150

350

375

600

Splash back

2200

1640

Grab Rail Wooden Building

Drg. No. NS FA 011

Drawn: NJG

Date: 17/5/07 Scale: NTS

NatSol Ltd Tel: 01686 412653www.natsol.co.uk

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NATSOL SITE LAYOUT, EXCAVATIONS AND URINE AND RAINWATER SOAKAWAYS – see site layout and excavation drwgs The drawings and instructions included with this guide show:-

1. The Site Layout for the COMPUS TWIN Full Access toilet 2. The required Excavations for Urine and Rainwater Soakaways 3. The method of installing or constructing these.

As levels of use, site conditions and local regulations will vary considerably, NatSol is unable to provide site-specific design advice on disposal of urine from the toilet or rain from the roof. These notes are provided as an illustration of typical requirements to allow the planning of an installation but do not guarantee compliance or adequate performance for a given site. Whilst the volumes discharged are generally too small to cause concern, Building Control and the Environment Agency should have been consulted prior to installation. Although volumes of urine or roof run-off are small under-sized soakaways in heavy soil or where there is a high water table will fail. This could result in surface water backing up and flowing into the compost chamber via the urine outlet. It is essential that this toilet is not installed on sites which may become waterlogged or flooded at any time during the year without first consulting NatSol to discuss possible solutions.

Roofwater Ideally this should be collected in a water butt. However any overflow must be directed away from the building foundations. It is usually recommended that the roof water is kept out of the urine soakaway and directed to a separate soakaway. However, with the GRC soakaway unit it may be acceptable to use it for rainwater too – please read the Checklist below to help decide. If a separate soakaway is required for rain then a pit 600mm square by about 600mm deep filled with broken bricks, or similar, to a depth of 500mm should suffice in all but the heaviest soil. See fig 1. A layer of geotextile excludes soil and the pipe enters just beneath this. You may need to buy additional 110mm fittings over and above those we supply.

Figure 1. Rainwater soakaway.

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Urine For most toilets we now supply this ready made GRC soakaway for urine.

Please examine these photographs and see the excavation drawings before installing.

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Rainwater may enter the soakway only if the ground is free draining. See checklist below! Excavate an area of ground measuring 1.3 m by 1.3m and 380mm deep. It should be no closer than 1m from the side of the vaults and in a position that the urine exit pipe [on the RHS of the vaults looking from the front] can be connected easily to the soakaway unit. If there is no room on the RHS then make the excavation behind the toilet vaults. To have sufficient gradient on the pipe the soakaway should be no further than 3m away on a flat site. You will have to judge the precise excavation depth so that when you eventually backfill with soil the finished ground level is just beneath the aluminium cover on the gully. The soakaway unit is intentionally shallow so that the urine goes into the biologically active topsoil. The pipe from the vaults should fall at not less than 1:60 and will only be a few inches beneath the ground. Position the unit in the centre of the hole so that a 110mm underground pipe from the vaults can connect to the brown 110mm pipe stub projecting through the near end of the unit shown above. Place hardcore or left over aggregate to each side of the unit where the slots occur. Cover the whole unit and the hardcore or aggregate with the geo-textile provided and cover with earth. In some cases it may be acceptable for the rainwater to go to this soakaway as well. In which case this should be arranged before backfilling – see below. Checklist to decide on whether rainwater can go to the GRC soakaway too.

1. Only rainwater from the roof of a NatSol Compus Twin Full Access toilet could possibly go to the soakaway. Rainwater from other buildings should not go to this soakaway.

2. The topsoil should be at least 350mm deep or the subsoil should be porous. 3. The site should not be permanently or intermittently water-logged or closer than 10m to

a watercourse or lake. 4. The site should not be in an area of heavy rainfall. 5. IF IN DOUBT CREATE A SEPARATE SOAKAWAY FOR RAIN.

If these conditions are satisfied then use a layout like one of those shown on the attached drawing Excavations and connect the rain pipe into the spare hole in the end of the soakaway. If the conditions are not satisfied then blank off the spare hole in the end of the soakaway with the blanking plug provided, held in place with SIKAFlex. Then construct a separate soakaway for rainwater as shown above. Site constructed urine soakaway – if you don’t have a GRC one. On some sites a urine soakaway constructed on site purely from hardcore may be more appropriate – figure 2. This will have been agreed before supply of goods. If constructed it should be shallow to allow dispersal and treatment in the biologically active topsoil. Length in the region of 1.5m on permeable sites.

Fig 2. Site urine soakaway

SOAKAWAYS AND FLOODING RISK – SLOPING SITES

Ground water around the soakaway could cause vaults to flood!!

Install a land-drain to prevent flooding of soakaway area.

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NATSOL VAULT INSTALLATION – see vault installation drawing

Checklist of components [& tools] supplied by NATSOL for this stage:a. vaults with dividing wall and with urine outflow spigot & rodding access bonded inb. lid/floor section with 4 galvanised hatchesc. 1800mm length of half round gutter for urine collection, fittedd. GRC soakaway unit with back inlet gully OR gully without soakaway unite. selection of 110mm connectorsf. SIKA - adhesive mastic to seal lid to baseg. lifting slings and lifting eyes for lid– normally carried in driver’s cab with SIKA

Personnel & skills required for this stage:h. machine operator, banksman and 1 or 2 othersi. site marking out & excavationj. concrete preparation and levellingk. lifting using digger, shackle and slingsl. checking levelsm. masticking

Method – see accompanying SITE LAYOUT drawing:-

NB.1. To avoid risk of hole filling with rainwater do NOT carry out excavation until vaults

are on site.2. Vaults should be bedded onto wet concrete – do NOT prepare slab in advance.3. If there is likely to be heavy rain before the concrete has set around the vaults it

may be wise to fill the vaults with water to prevent flotation and pump out later.4. The toilet vaults weigh approx half a tonne and installation could be dangerous if

our instructions are not followed or if unqualified personnel are employed tooperate and direct machinery. Keep un-needed people clear of site by roping off.No children in the vicinity. Wear safety clothing. Put digger driver and banksmanin charge.

1. There are two methods by which vaults can be off-loaded from the delivery lorry. Youcan use the lifting slings supplied [look inside the vaults] and a “D” shackle [notsupplied] as shown below OR use the forks on the digger or other machinery –providing they are long enough and strong enough to lift 850 kgs. If you use forks youmay need to swing the vaults around so that the forks pass underneath from one siderather than from the end. You can also reduce the total load by removing the floorsection whilst the vaults are still on the lorry. Lift using machinery and set aside ontimber bearers – see below. If you remove the vaults from the lorry complete with floorsection remove this and any GRC soakaway afterwards.

2. Now carefully plan the excavation and soakaway/s. See notes and drawing: SITELAYOUT, EXCAVATIONS & SOAKAWAYS. The exit pipe for the urine soakaway is onthe right hand side of the vaults as viewed from the front [door end]. If there is no room

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this side for the soakaway or if it is unsuitable ground then place the soakaway behind oreven on the other side but keep the vaults the same way round. You will need more pipeto connect up if the soakaway is more remote but this is fine providing the pipe runsdownhill with a gradient of at least 1:60. For the vaults mark out the excavation 2m [sideto side] x 2.5m [front to back]. For depth see Vault installation guidance drawing. Onmost sites it will be 850mm. On sloping sites the maximum depth should be as shown.

3. Carry out excavation finishing by hand if necessary to achieve 850mm depth evenly over1.8m x 2m central area in bottom of hole. Carry out urine soakaway excavation too –and rainwater soakaway if a separate one is required.

4. Check that subsoil is compact and firm. If it appears unstable seek professional adviceas to how to proceed.

5. Make screed rails run front to back, 1.8m apart, and level them. Tops should be 800mmbelow ground level so that finished floor level of cubicle is approx 120mm above ground.

6. Fill area between them 50mm deep with fairly dry mix of approx 6:1 [aggregate: cement]and level off.

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7. Check again which way round the vaults have to go to ensure that urine exit pipe is onthe right hand side and then using slings beneath the end vault flanges lift the vaultsusing the digger or other machinery and lower into position.

8. Check to see that the vaults are not out of level by more than 10mm across the widthand length. Lift out and re-level base if necessary or tap down gently on high side usinglarge rubber mallet.

9. Mix remaining concrete and fill around outside of base of unit to cover bottom retainingflange and to connect to concrete beneath. In heavy clay soils where clay comesclose to the surface use 1m3 [2 tonnes] additional concrete in this way so as toprevent possible flotation of vaults [and building] if ground becomes waterlogged.

10. Earth may be backfilled at this stage but leave out sufficient to enable access below theflange to insert the bolts or screws which will hold the building in position.

11. Clean rim of vaults and apply generous amount of SIKA to this and to the top edge of thevault divider.

12. Carefully lower lid/floor section into position using slings and digger. The 160mmdiameter vent pipe hole should go in the back RH corner of the building as viewed fromthe door. Check alignment and bed down manually. Point up join between vaults andfloor around the outside edge with SIKA.

13. Install soakaway as shown in the Soakaway Instructions and make sure the height issuch that the 110mm pipe from the vaults will have a minimum 1:60 fall. If you have not

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been supplied with a ready made soakaway unit then the back inlet gully must besituated in the ground and stabilised with some concrete around it – see picture below.Whichever type of soakaway you are installing use the GREY 90 deg bend assemblyto connect to the vaults and to get underground.

14. With the GRC soakaway behind the toilet [Position A] use a 90 degree BROWN bendconnected to the GREY bend assembly shown below. If the soakaway is alongside thetoilet [Position B] then go directly with 110 pipe. Fittings are in the pedestal box. If youhave bought a building from us there is a 3m length of 110mm pipe inside the 160mmvent pipe. You may need to acquire other fittings.

15. Position of rain gully in relation to vaults. Shown at vent pipe corner. Could be placed atother rear corner in equivalent position if preferred.

16. If the building is being erected later cover up the vaults to prevent rainwater getting in.

T: 01686 412653

Ground level ►

A view from the front of the building. The ventilationsocket is in the back RH corner.

Rake rested inside active vault.

Back inlet gully position if GRCsoakaway NOT supplied

Side of vaults with grey bendassembly connected to urine outlet

20 Bethel Street Llanidloes Powys SY18 6BS T 01686 412653 F 0870 6221384

info@natsol.co.uk www.natsol.co.uk

VAT no 869927743 Company no: 5624596

Vault installation guidance drawing for COMPUS TWIN FULLACCESS composting toilet.

Contract number:

For this installation, based on the information you have sent us, we suggest that theexcavation depth should be 850mm/750mm resulting in a finished floor level at150mm/250mm above ground as shown n the LEFT/RIGHT hand drawing below.

LEFT

The excavation depth on dry free-draining sites is 850mm and 50mm screed is then placed in thebottom of the hole to reduce the depth to 800mm. This is the LEFT HAND drawing above. In thiscase the finished floor level will be 150mm above ground.

RIGHT

On wet sites or where there is heavy clay the excavation depth should be 750mm reduced to700mm once 50mm screed has been placed in the hole. This is the RIGHT HAND drawing above.In this case the finished floor level will be 250mm above ground.

Sloping sites

On sites which cannot easily be levelled the depth on the deepest side should be as above.

PLEASE INFORM US IF YOU DO NOT ACHIEVE THE REQUIREDHEIGHT DIFFERENCE BETWEEN FLOOR AND GROUND LEVEL

JOB NAME: _______________________________________

If no job name is filled in these instructions are only for estimating and should not be used for installation.

NOTICE TO PURCHASERS AND INSTALLERS:

Some people consider it a matter of principle not to read instructions and prefer the heroic approach of assembling something without being told how to do it….!! NATSOL toilets are not difficult to install but failure to read these instructions could prove very expensive - for you. We advise clients not to pay their contractors until we have received a full set of installation photos a list of which is included. These instructions must be passed on in full to the person who is actually doing the installation at least a week in advance and they should inspect the site in advance. (This applies even if a representative of NATSOL is going to be on-site to supervise. You will be charged for supervision even if, as a result of poor preparation by your installation team, nothing gets done. The presence of NATSOL staff on site is not an excuse for the installation team to turn up ill equipped, ill informed, under staffed and under skilled.)

We do not guarantee our products either in terms of durability of components or correct function unless properly installed. If you are an experienced installer of our toilets it’s still worth checking through to see what’s new.

Contents:- 1. Copy of our letter to client 2. Basic requirements list – tools, machinery, personnel 3. List of photos to be returned to us before contractor gets paid 4. Risk assessment for installation 5. Site and soakaway instructions including drawings 6. Vault installation including site specific drawing 7. Building erection and fitting out

T 01686 412653

COPY OF LETTER TO CLIENT: Dear Client…….. INSTALLATION PROCEDURE FOR COMPUS TWIN TOILETS NatSol does not usually carry out installation of its products. We can offer supervision of installation for an agreed fee should this be deemed essential. In most cases we hope to avoid supervision in order to minimise costs. We are, of course, very concerned that installations are carried out to a high standard. To ensure this happens it is essential that you appoint a competent builder to carry out the work. Installation typically requires a 4 tonne machine, or larger, to off-load the vaults from the delivery lorry, to carry out excavation and to lower the vaults into the ground. Assembly of the vaults and building requires general building skills and at least three persons on site not including anyone in a purely supervisory role. You should choose a contractor who is familiar with all relevant health and safety procedures for the work involved and who will read our installation instructions and risk assessment thoroughly before the installation day. The instructions tell the contractor what tools, equipment and materials he/she must supply. It is essential the contractor turns up, properly equipped, on the day arranged otherwise the delivery lorry will have to return to the depot with the vaults and you will have to pay for a second delivery. We can also assist in the following ways:-

1. In parts of the country where we know of a contractor experienced in installing our products we will make their contact details known to you.

2. We ensure that full installation instructions are sent out in advance to contractors and are available to discuss these in advance of installation.

3. With reasonable notice we are usually available by phone on the day of installation to answer any questions that may arise.

Whether or not you use a contractor to complete your installation our product guarantee is subject to us receiving a set of specified photographs as detailed on the reverse of this letter as a way of assessing the quality of installation. This is not necessary in cases where NatSol has supervised the entire installation process. We recommend that these photographs are checked by us before you pay your contractor. The contractor should be informed by you in advance of the intention to use photographs as a way of assessing the quality of their work. Having said this it must be understood that the contract for the installation is between you, the client, and the contractor and that if the product is badly installed NatSol cannot accept any responsibility whatsoever unless it can be proven that components were missing at the time of delivery or were defective. Please contact us if you have concerns about any issues above. Best wishes, Andrew Warren MD

NATSOL - COMPUS TWIN Full Access

SUMMARY OF MATERIALS, TOOLS AND PERSONNEL REQUIREMENTS –

Black items concern the vaults. Blue items concern the building erection and fitting out. 1. Materials required - NOT supplied by NATSOL:

a. 0.5 m3 of concrete as bedding layer for vaults [C20P to BS 5328 (1:2:4 mix)] b. 0.5 m3 of concrete [as above] for haunching around base of vaults c. additional 1m3 (2 tonnes) of concrete for haunching around base if heavy clay d. additional soil pipe and fittings if required to reach desired soakaway site e. silicone grease for pipe jointing f. exterior finish for timber clad buildings – OS COLOR products recommended

2. General building tools & equipment including the following:

a. safety clothing □

b. tape measure □

c. marker spray □

d. digger to excavate □

e. machinery to unload 850kg from lorry and lower 650kg into ground □

f. spades, shovels □

g. concrete mixer [could be done by hand] □

h. wheelbarrow □

i. 50mm thick screed rails – 2 @ 2.5m long with pegs fixed at each end □

j. 2m long screeding bar □

k. long spirit level □

l. mastic gun □

m. hammer □

n. saw [for cutting plastic pipe] □

o. ladder to assist with building erection □

p. large flat bit screwdriver □

q. powerful cordless drill or generator and drill □

r. socket drives for cordless or spanners □

s. drill bits for piloting timber or metal and plastic □

t. small assortment of ZP woodscrews □ 3. Personnel & skills required for vault installation [approx time 4 hours]:

A machine operator, banksman and 1 or 2 others qualified in general building skills particularly wet work. The vaults will need to be lifted using machinery and a “D” shackle. The slings are supplied by NatSol but not the shackle.

4. Personnel & skills required to erect building [approx time 4 hours]: General qualified building skills - 4 people for erection of frames and roof, then 2 for finishing

5. Personnel & skills required to fit out [approx time 2 hours]: General DIY or plumbing skills, 1 person is fine, 2 is useful.

Qualified electrician needed to connect fan on toilets with fan driven [as opposed to passive] ventilation systems.

NB. The construction times mentioned above [points 3,4,5] are given in good faith but NatSol Ltd cannot be held responsible for the additional cost incurred by installation times in excess of these or for any other circumstances [e.g. delay in completion of the installation] which may arise as a result of extended installation times.

CHECKLIST OF INSTALLATION PHOTOS TO BE SENT TO NATSOL BEFORE PAYING YOUR CONTRACTOR IN ORDER TO OBTAIN OUR GUARANTEE

SOME OF THESE NEED TO BE TAKEN DURING THE INSTALLATION PROCESS

1. The excavation and the concrete screed levelled off. 2. The excavation for the soakaway. 3. The vaults in the ground but before the lid/floor section is fitted. This should show the urine

gutter in position and the SIKA mastic around the rim of the vaults. 4. SIKA pointing up the gap between the lid and the base of the vaults after the lid has been

fitted. From 2010 onwards it shouild be possible to take this picture after the building has been erected - if that helps.

5. The soakaway in position before back-filling commences. This should include the pipe connection from the vaults which must slope down [at a gradient of 1 in 60 minimum] to the soakaway.

6. One of each elevation of the building from outside including, on at least one elevation, the full height of vent pipe. Corner and roof flashings should be in place.

7. Two looking inside the cubicle showing both side walls with fixtures and fittings showing the quality and completion of fitting out.

8. One of the urinal pipework. 9. One looking down the pedestal [with flash on] so that the urine separating plate and the soak

in the bottom of the vault are visible. 10. One into the active vault with the front cover removed showing the rake in place. The picture

should be taken at a low enough angle that it is possible to see the bottom of the stainless steel urine separating plate over the urine collecting gutter.

11. One to confirm that the end of the urinal pipe does not block the urine gutter under the floor but stops approx 60 to 100mm above the bottom of the urine gutter. Picture 7 might provide this if the RH vault is used first.

1 2 3 4 5

6a 6b 6c 6d 7a 7b

8 9 10a 10b 11

You may wish to send us additional photographs but please limit the total to 20 unless a specific problem has arisen with the installation which you need to illustrate.

NatSol The Compost Toilet Specialists

RISK ASSESSMENT FOR SITE INSTALLATION OF COMPUS TWIN TOILETS - Full Access Models

Original Date: 1/10/07 Carried out by: NatSol Ltd Signed:

Reviewed Date: 24/8/09 Carried out by: AW NatSol Ltd Signed:

Contractors additions Date: Carried out by: Signed:

Potential severity [S] Likelihood of occurrence [L] Risk [S x L]

Fatal/Major/Illness 3 Certain/More than likely 3 3, 6 or 9 High

Injury/Lost time disability injury 2 Reasonably likely 2 2 or 4 Medium

Minor injury or illness 1 or 0 Seldom/Very unlikely 1 or 0 1 or 0 Low

The risk levels shown below are the residual risk if safety precautions included in our installation instructions and shown below are adhered to.

Significant hazards Persons at risk. Existing controls Residual level of

risk

FURTHER ACTION REQ'D BY CONTRACTOR:

Name and location

of person/place at

risk

As described in the installation

instructionsAction: By whom: By date: Done

[tick]

1

Manhandling building sections

from lorry. Risk of dropping,

cuts or pinching.

Clients, volunteers

and contractors

High visibility safety clothing and

gloves and safety boots.2 [S] x 1[L] = 2

2

Off-loading vaults from lorry

using machinery. Vaults weigh

approx 600kgs or 850kg if off-

loaded complete with lid. Risk

of dropping.

Contractors +

bystanders

Rope off area. High visibility safety

clothing and gloves, hard hats and

safety boots. Use appropriate

machine for load to be lifted. Correct

use of D shackle [to be supplied by

machinery operator] and slings

supplied by NatSol OR use forks on

machine if long enough. 3 [S] x 1[L] = 3

3Use of machinery to excavate. Ditto + bystanders Rope off excavation area. Safety

clothing as 2 above. 3 [S] x 1[L] = 3

4

Use of cement to make

concrete - alkaline dust

Contractors +

bystanders

Use dust masks and gloves. If windy

use goggles. Keep bystanders clear. 2 [S] x 1[L] = 2 PTO

5

Lowering vaults into ground.

Risk of dropping.

Contractors +

bystanders

Keep operating area roped off. Safety

clothing as in 2 above. Use

appropriate machine for load to be

lifted. Correct use of D shackle [to be

supplied by machinery operator] and

slings supplied by NatSol. 3 [S] x 1[L] = 3

7Fitting vault floor section. Contractors +

bystanders

As above + risk of finger pinching.2 [S] x 1[L] = 2

6

Drilling of vault flanges. Dust

and use of electrical

equipment.

Contractors Use dust masks and eye protection.

Use cordless drill OR corded drill with

voltage and protection equipment

[e.g. trips] to meet all required site

standards. 1 [S] x 2[L] = 2

8Sharp edges on metal building

sections

Contractors Use gloves and safety boots.1 [S] x 2[L] = 2

9

Wind blowing building over

during erection

Contractors +

bystanders

Safety clothing as in 2 above.

Sufficient operatives to support

building sections manually. Use

props as necessary. Do not erect

building in strong winds. 2 [S] x 1[L] = 2

10

Wind blowing off roof before

fixing down.

Contractors +

bystanders

Hold roof down manually as soon as

it is in place and fix immediately. Do

not fit roof in strong winds. 3 [S] x 1[L] = 3

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Use of ladder to lower vent pipe

into building

Contractors +

bystanders

Ladder to meet appropriate BS and

rest only on level well compacted

ground. Person appointed to support

ladder when in use. Not to be done

under windy conditions. Keep

bystanders clear. 3 [S] x 1[L] = 312 Fitting roof edge flashings. Contractors As above

2 [S] x 1[L] = 2

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Painting - fumes and splashes

to eyes or skin. Depends on

type. Paint not supplied by

NatSol

Contractors Use gloves and other protective

clothing as seems necessary.

1 [S] x 1[L] = 1

NATSOL METAL BUILDING ERECTION FOR COMPUS TWIN FULL ACCESS

See: Internal layout drawing for metal building

What you need:-

1. Components [& tools] supplied by NATSOL:a. building sections; 4 walls and roofb. internal timber cladding sheets & fixing screwsc. cover flashings for corners and roof edgesd. gutter, downpipe kit & gullye. pack of bolts, nuts and washers of various sortsf. door handle setg. universal 10mm drill bith. 3 m length of grey 160mm diameter pipei. directional cowlj. self tapping screwsk. vent pipe flashing collarl. SIKAFlex

2. Tools & equipment required:a. safety clothingb. tapec. ladderd. powerful cordless drill or generator, trip and corded drille. socket drives for cordless or socket set and/or spannersf. drill bits for piloting timber & metalg. small assortment of ZP woodscrews for pipe fixings etch. mastic gun

3. Personnel & skills required:a. 4 people for erection of frames, then 2b. measuring & drillingc. lifting and positioningd. fitting bolts and cladding screwse. masticking vent pipe

Method – see accompanying drawings and/or photos:-

NB. Use appropriate safety clothing for all stages; particularly gloves and boots.Before you start to erect the building make sure that all 4 apertures in the floor havegalvanised hatches fitted. Do not erect under windy conditions. Keep bystandersclear by roping off site. If using corded power tools use correct voltages [and/orprotective trips] for site work.

1. Please do NOT cut up or destroy the timber packing system for the building. This willeither go back with the carrier or be collected later. Remove all the lower internal liningboards from the building walls. They are held in place with screws along the bottom edgeand will slip out of the upper channel when these screws are removed. Make sure youknow which board came from which wall section.

2. If temporary blocks have been screwed to the underside of the sole remove these.3. Mark on a line with a pencil 50mm in from the vault edges to help you align the soles of

the building.4. Stand rear wall section in place centrally L to R and line up the inner edge of the sole with

the pencil line. Support this wall section with props or otherwise hold securely.5. Stand a side wall section in place. Use the connecting bolts to join rear and side walls

together. Line the wall up with the line as above.6. Position the other side wall and connect to the rear wall. Line up as above

7. Check that the rear wall is still on the line and fix it down by drilling through the metalbrackets and timber soles as shown using a cordless drill and universal 10mm bitsupplied. DO NOT USE A HAMMER SETTING.

8. Fit two 100mm bolts with washers from beneath with washers and nuts on top and tighten.9. Check that both side walls are on the line. The gap left at the front between the metal

frames of the side walls [into which the front wall will be fitted later] should be about1765mm. Measure this low down!

10. Steady these walls whilst drilling the holes. If conditions are windy use props to hold theside walls securely in this position whilst drilling.

11. Repeat the fixing method used at the rear.

12. Now slide the side wall ply linings into position with the stencilled face showing and screwthe bottom edge to the sole.

13. Now fit the rear wall lining by sliding the top up into the metal channel and screwing thebottom to the sole.

14. Fit the front wall and connect to side walls using bolts. With the bottom of the wallpushed back against the vault edge drill the floor through the two metal brackets andtimber sole [one to each side of the door] and fit the bolts.

15. Now fit the roof. Slide it up from the back with 2 people inside and 2 outside. Find a wayof holding it down whilst fixing - a roof blowing off is very dangerous! Use 4 of the selftapping cladding screws supplied with the building and insert these through the 4 sidesupport brackets up into the roof member using a cordless drill and socket drive. Thebrackets should have a 6mm clearance hole for the tek screw. Check with a 6mm bit first.

16. Fit corner flashings. Obviously the longer ones are for the front. Hold them against thecorner making them level with the corrugated at the bottom. Now drive self tappingcladding screws through them where ridges in the corrugated sheet occur behind. Forneatness use the same heights for the screws on each face and each corner.

17. Side roof flashings. It should be sufficient to fix these into the walls alone and to use aline of mastic between the top edge and the roof. Align them with the rear edge of the roof.

18. Front roof flashing. Fit this using 4 tek screws along the top and 4 on the front. The endcaps will need sticking on with SIKA.

19. Fit gutter and downpipe – a tedious job! We supply self tapping screws for this. Workout which side it’s best to have the downpipe and fit this first getting the bracketspositioned on the corner flashing. Then fit the gutter. It may be possible to direct the waterto the urine soakaway or there may need to be a separate soakaway – see SoakawayInstallation Instructions. You must decide on an appropriate course of action dependingon site conditions and typical rainfall. We supply a rainwater drainage gully but you mayneed additional pipe. Eventually you should also install a rain butt and diverter.

20. The vent pipe. Slide the plastic storm collar on to the pipe and position approx 800mmdown from the top end.

21. Attach directional cowl to the top end of the pipe with self tappers. [If the vent pipe issocketed at one end use this end for the cowl or cut off the socket after first checking thatthe cowl will fit satisfactorily in the pipe by trying it in the other end.]

22. Insert pipe down through hole in roof. Use a properly supported ladder, sufficientpersonnel and do not attempt under windy conditions.

23. Locate bottom end of pipe in floor socket.24. Slide storm collar down over roof collar. Seal to pipe with SIKA or similar.

25. Seal pipe into floor socket with SIKA. You won’t get around the back of the pipe but italmost certainly doesn’t matter. The SIKA is a strong adhesive but if you really thinksomebody might try to steal the vent pipe you could insert self tappers through the plasticstorm collar into the steel roof collar. Though these may compromise weather tightness.

INTERNAL FITTINGS

N.b. Some pictures illustrate the inside of timber buildings.

What you need:-

1. Components [& tools] supplied by NATSOL:a. toilet pedestal with urine separating plateb. white seat adapted for pedestalc. 2 hand disinfectant dispensers and 2 gel packs – load one in dispenser by

pedestal, keep the other as spared. 2 toilet roll holderse. ceramic urinal with splashback, trap, mounting brackets and pipework – all

stored inside the soak box.f. 40mm solvent weld pipe [long piece over rake handle],g. soak bin containing some wood shavingsh. coat hooki. various screwsj. metal rakek. emptying spade – store this somewhere else, you won’t need it for years.

2. Tools & equipment required:a. saw for pipe cutting,b. cordless drill & bitsc. flat bit screwdriver

3. Personnel & skills required:a. 1 person is sufficient, 2 is handy

Method – see accompanying drawings and/or photos:-

1. Fit splashback for urinal in front RH corner of cubicle. Use self tappers throughperimeter dots to fix. Fit brackets to postion marked in centre and hang urinal asshown. Fit waste and threaded adaptor below. It is preassembled.

2. Connect up urinal pipe work ensuring suitable fall in pipe, clip to wall. The pipe throughthe floor should be pushed into the hole up to the felt tip line. Any more than this and itmay block the gutter.

Wooden building interior Metal building interior – soak box not fitted

3. Fit the grab rails in the positions shown on the walls or use the Grab Rail LayoutDrawing. One grab rail is for the back of the door and will need to be fitted using theself tappers provided.

4. The wall mounted “soak” box is best fitted before fitting the pedestal. Fix the mountingbrackets to the wall in both pedestal positions. The screw positions should be marked.If you can’t see them then the top of the box should be 1100mm off the floor and youshould leave a 25mm gap between the side of the box and the circular fixing plates ofthe rear vertical grab rails. Hang the box behind whichever pedestal position youintend to use first. If you don’t want it to be easily removed put in a screw through thecentral hole in the back of the box.

5. Position the pedestal in which ever one of the rear hatches you decided to use first.The rear of the pedestal should be inserted first to engage the clip at the back underthe floor and the urine separating plate must then be swung back to allow the pedestalto drop into position. If you are puzzled about how the urine separator directs urine tothe gutter the answer is that the urine sticks to the underside of the last section of thestainless steel plate by surface tension.

6. Fit toilet seat following instructions on box.7. Fit the dispensers which open by pushing up recessed button underneath at rear.8. Fit toilet roll holders, one each side, in position accessible from pedestal.9. Fit coat hook on back of door or opposite urinal.10. Open front hatches and spread a 2” to 3” layer of Hemcore evenly over the base of

both vaults. If you have some left you could use it to top up the soak bin althoughwoodshavings will be better at covering over solids in the toilet.

11. Place the rake in the active vault so that handle is accessible from the emptying hatchin front of the pedestal – it stays in there until vault changeover and is then moved tothe new active vault.

12. If you want to seal the floor then wait till everything else is done. Clean carefully, allowto dry and use a sealant such as OS Floor Wax (High Polyx).

FINISHING OFF OUTSIDE - We don’t supply anything for this and it will dependvery much on the site.

1. A ramp and landing area will be required and should be constructed to comply withbuilding regs. Maximum gradient 1 in 12; width of ramps 1200mm; depth of levellanding area in front of door should be about 2200mm to provide 1200mm clear whendoor is open. Make sure the landing area is very slightly below the floor level so thatrain doesn’t run inside. You may need to construct a new approach path.

2. We strongly advise you to fit a post preventing the door from opening further than 90degrees. From 1st Feb 2010 all our doors will be fitted with restrainers but these couldbe damaged in high winds. The post should not obstruct disabled access.

3. Don’t forget to fit a rainbutt to make use of rainwater and to reduce the amount ofwater going to the soakaway. Rainwater is fine for floor cleaning, urinal rinsing etc.

T 01686 412653

700

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1150

Hand clean

770

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600

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2200Grab Rail Metal Building

Drg. No. NS FA 012

Drawn: NJG

Date: 17/5/07 Scale: NTS

NatSol Ltd Tel: 01686 412653www.natsol.co.uk