Construction Detailing and Site Inspection Guide - DPTI · PDF fileConstruction Detailing and...

Construction Detailing and Site Inspection Guide (G16 OCT16) Updated October 2016

Construction Detailing and Site Inspection Guide

General

Building Projects is a section of Project Delivery, Department of Planning, Transport and Infrastructure (DPTI) which assists government in the management of its building assets and procures building construction and related professional services. Building Projects actively guides projects through the critical phases of brief definition, professional service contractor engagement, design, documentation, tendering for construction contractor services, construction and handover.

Construction Advice Role

A key element of the function is the construction advice role which includes:

meeting with professional service contractors in early documentation stage and advising on appropriate design detailing;

reviewing professional service contractors’ drawings and specification for construction detailing and methodology;

providing advice/assistance to architects, engineers and construction contractors on construction technical matters, materials, good trade practices, standards and contractual obligations during the Construction and Review phases;

monitoring the contract administration performance of professional service contractors;

monitoring the construction performance of contractors;

developing appropriate practices for site inspections;

developing construction detailing and methodology standards;

advising government, the industry and DPTI on construction inspection; and

providing advice and support on government construction site OHS&W issues.

The management of this critical function is achieved through a team, specifically established to deliver the construction advice role. The team comprises specialists with extensive experience in construction and constructability.

Background to the Guide

In regard to the establishment of standards for construction detailing and site inspection, Building Projects has worked for many years in the design and construction of major projects for the various agencies of government.

Acquired knowledge and experience has indicated a range of recurring problems, oversights or checkpoints for the design team as the projects pass through the documentation and construction phases.

This Guide is a checklist and memory jogger, deliberately kept brief and to the point. The


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architect (lead professional service contractor) and its subcontractors are expected to consider whether the listed points need special clarification in the drawings and specification or should be checked with the contractor on site.


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Contents

Construction Detailing and Site Inspection Guide 1

General 1

Construction Advice Role 1

Background to the Guide 1

Architectural 6

Introduction 6

Aluminium Work 6

Carpet 6

Doors 7

Furniture 7

Glazing 7

Hardware 7

Joinery 7

Linings 8

Masonry 8

Metalwork 9

Painting 9

Partitions 9

Plasterer 9

Preliminaries 10

Resilient Finishes 10

Roofing 10

Sanitary Plumbing 11

Tiling 11

Woodwork 12

Civil and structural 12

Introduction 12

Concrete 12

External Sewer 13

General 13

Irrigation System 14

Landscaping 14

Paving 15

Retaining Walls 15


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Roadworks 15

Sewer 15

Stormwater 16

Structural Steel 17

Electrical 18

Introduction 18

Cabling 18

Emergency Exit Lighting 18

Lighting 18

Main Earth Design 18

Main Electrical Service - Submains 19

Mounting Heights 19

Isolating Switches 19

Exhaust Fans 19

Air Conditioners - Split Unit 19

Room Airconditioner – Window/Wall 20

Machinery 20

Laboratories 20

Mounting of Switchboards on Concrete Plinths 20

Power Circuits 20

Project Completion 20

Data – Computer Installations General 21

Trenches 21

Switchboards (Main and Distribution Boards) 21

Mechanical And Hydraulics 22

Introduction 22

Ductwork 22

General 22

Secondary Schools Science Rooms - New and Upgraded 23

School Activity Halls 24

Child Care Centres 24

Maintenance and Operating Instructions 24

Pipework Fittings and Valves 24

Contact 25

Manager and Mechanical and Hydraulics 25

Architectural, Civil and Facilities Management Error! Bookmark not defined.


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Electrical/Electronics Error! Bookmark not defined.

General Enquiries Error! Bookmark not defined.


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Architectural

Introduction

The professional service contractor (Architect) shall undertake inspection to ensure:

all work is covered up;

materials are as specified and as per sample panels;

that fixing of cladding materials is as specified;

that second fixings are as specified;

that work is in accordance with good practice and specified requirements.

Aluminium Work

Specify window fixings to be zinc plated at 600 centres as per AS fixings.

Specify angle trims internal and external to weather proof.

Specify glazing to AS 1288-2006 Glass in buildings – selection and installation.

Specify to protect aluminium frames during construction.

Check flyscreen material for fire zone areas metal required.

Check shop drawings.

Check door, strikes and door hinges are to be let in flush to frame edges.

Check anodised thickness to aluminium.

Packing required for fixings to be durable.

Carpet

Specify flat vinyl skirting in carpeted areas.

Specify mat type and mat well surround.

Specify all floors to be clean, dry wax and alkali free.

Specify existing floor preparations in accordance with manufacturers written instructions.

Specify carpet seams to run the length of the area.

Specify for direct stick carpet seams, rolled flat, aligned joints and seam.

Specify cross joints kept to a minimum, fillers not less than 1000mm apart.

Specify overspray shields are used on direct stick carpet.

Specify fit trims to areas where carpet abuts external doors and other surfaces.

Specify protect carpet during construction period.

Specify carpet to be power cleaned upon completion.

Check door clearances.

Check correct underlay as specified.

Check correct carpet thickness as specified.


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Undertake Relative Humidity test for concrete floors as per code (1 month prior to laying)

Check correct glues to be used.

Doors

Specify timber edge strips to all doors.

Specify prime top and bottom edges of doors before hanging.

Check door thickness specified and select type of lock to suit.

Check door swing clearance.

Check marine ply to external doors.

Check steel roller shutter specified and additional extras specified, stiffening bottom rail, windlocks and locking bolts.

Check powder coating or painting.

Check accordion and operable wall doors specified for STC rating and seek acoustic guarantee and warranty.

Furniture

Check compactus for lockable single sided mobile (must be 400mm deep).

Glazing

Specify aluminium section which can accept specified glazing.

Specify polycarbonate glass to be glazed with neutral cure silicone.

Specify mirrors to have neoprene packets between glass mirror and wall.

Specify glass rebates in timber windows to be primed and painted before fixing glass.

Specify external timber glazing beads to be watertight sealed to prevent wet rot between bead and glass.

Check glazing to AS 1288-2006 Glass in buildings – selection and Installation.

Check glass thickness.

Hardware

Check that all hardware is fixed as specified.

Organise master keying ASAP with client.

Joinery

Specify corners of joinery tops to be cut back 45o for safety, or rounded.

Specify door hinges to be 170o opening.

Specify bench tops to be moisture resistant in wet areas.

Specify cover flanges to be fitted over all cupboard penetrations to vermin proof.

Specify bench legs to be screwed to floor.


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Check silicone seal junction between bench tops and walls and splashbacks, minimum 3mm.

Check silicone seal toe board to floor in wet areas.

Check doors specified to have locks.

Linings

Specify moisture resistant plasterboard to wet areas.

Specify type of joints and control joints in ceiling/wall linings.

Specify type of edge treatment to linings such as flushed casing bead, surface casing bead, shadow line bead.

Ceiling linings should not be fixed direct to underside bottom cord of truss (cord deflects).

Check acoustic rating of partition.

Check screw, nail and glue linings to studwork and battens.

Specify impact resistant plasterboard to high impact areas.

Masonry

Specify control joints to walls.

Specify parapets to have metal capping to weatherproof.

Specify mortar 1:1:6 for clay, cement blocks.

Specify horizontal joints to be raked out for plastered walls.

Specify close cavities at reveals of external openings.

Specify cleaning out holes for bottom of cavities.

Specify weephole at 1200mm CIS spacings.

Specify mortar to be batch mixed with buckets to maintain even colour.

Check DPC to parapets, i.e. clash with structural steel columns in cavity, glue and seal laps.

Check control joints are clear of mortar, backing rod fitted and correct depth and specified sealant used.

View sample panel.

Check wall ties/wall reinforcement.

Check that screw fixings comply with AS 3566 Self drilling screws for the building and construction industries (Class 2).

Check DPC, laps glued as specified.

Check bed and perp joints to masonry are full.

Check installation of termite protection – see guidelines.

Check masonry is cleaned ASAP after laying is complete, minimum 7 days after laying wash down roof sheeting and gutters if acid is used.

Check cavities kept clean with excess mortar removed.


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Metalwork

Check shop drawing of metal door frames, gauge of sheet steel, fixing of hinges, backing plates, lock strike plates and door thickness. Comment but do not approve.

Painting

Provide colour schedule ASAP for contractor.

Specify all mill marks to be removed from fascias, eaves, skirting prior to priming.

Specify prime timber prior to fixing, i.e. fascias, eaves, skirtings, top and bottom of doors.

Specify remove all door furniture prior to painting.

Specify contractor to obtain approval for spraying.

Specify prime rebates of timber windows prior to glazing.

Specify do not paint door hinges.

Specify all areas that can be touched by hands should be painted gloss enamel, i.e. doors, door and window frames, skirtings and eaves, window sills, external support posts and steelwork.

Check painting system specified ie number of coats.

Partitions

Specify toilet partitions 4 x 7.5mm FRC factory bonded.

Specify end partitions to be 4 x 7.5 FRC.

Specify divisions FRC 2 x 7.5mm rebated into frontals 7.5mm.

Specify finish to FRC toilet partitions and check fixings.

Specify that three door stops are provided to toilet cubicle doors.

Specify additional trimmers and studs for fixing fittings and hardware.

Specify control joint in gyprock linings detail positions for architectural purposes.

Specify trimming required.

Specify boxed studs in steel studwork at door and window openings.

Check gauge of steel studwork.

Check manufacturers details and specifications for fire rated studwork ie fixing/firecheck gyprock fixings. Check penetrations to fire rated walls are as per code with fire rated seals.

Check insulation to steel stud walls.

Check bottom track fixings at door ways.

Check deflection heads specified under floor slabs and trusses

Plasterer

Specify render finish ie sponge finish, wood float.

Specify batch mix render and plaster.


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Specify all chases in walls to have metal lath covering.

Specify dash coat 2:1 blockwork and brickwork prior to render coat.

Specify raked joints in masonry for adhesion of render.

Specify vee joint render, plaster at abutments of door frames, windows.

Specify external angles finish with 1.6mm radius corner bead.

Check control joints over masonry.

Preliminaries

Investigate possible asbestos content.

Receive dilapidation report from contractor.

Contractor to provide programme.

Contractor to arrange site meetings and provide minutes.

Contractor to provide as installed services drawings.

Contractor to provide operation, training and maintenance manuals.

Contractor to provide all guarantees as specified.

Check temporary fence around site provided as specified.

Check that protection of trees is in place – see guidelines.

Resilient Finishes

Specify flat vinyl skirting to be used on walls in carpet areas.

Specify fit feather edges to vinyl as required.

Specify polish pre sealed vinyl at practical completion, protect vinyl during construction period.

Specify concrete floors to be checked for finish prior to laying.

Undertake Relative Humidity test for concrete floors as per code (1 month prior to laying)

Specify spare maintenance material to be supplied.

Check floor for dryness as per AS 1884-2012 Floor coverings – Resilient sheet and tiles – Installation practices prior to laying vinyl.

Check thickness of specified vinyl.

Check welded jointing.

Check cold joint welding.

Check construction joints to concrete floor, movement joint may be required.

Roofing

Ensure compatibility between roof materials and box gutters.

Avoid box gutters but if unavoidable, specify support to box gutters and generous overflows.

Specify pole plate flashings with break to edge fitted to low pitched roofs into box gutter.


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Specify bottom 1800 of downpipe to be minimum gauge (0.8).

Specify glue or seal laps to sisalation for vapor barrier.

Specify in activity halls where sisalation is exposed inside mesh, protection to prevent damage from balls. Protection to be ARC WG23G2A.

Specify birdproofing to exposed ends of sheets into gutter line and top of valley gutters at ridge, barge flashing.

Specify penetrations through roof to be upstand with two piece metal flashing and plate to match roof sheeting.

Specify ridge and hip cappings to be scribed to roof deck profile.

Specify ball guards to downpipes eaves and box gutters.

Specify expansion joints to box gutters and eaves gutters.

Check if wire support required under roof insulation.

Check gauge of roof sheetings, flashings, gutters and downpipes.

Check roof fixings to comply with Australian Standards.

Check R valve of insulation.

Sanitary Plumbing

Specify drawing to be approved by SA Water.

Specify pipework to be lagged through concrete footings.

Specify roof flashings for vents to be two piece and scribed roof plate to match sheeting.

Specify contractor to provide as installed drawings.

Check excavation of trenches.

Check bedding of drains.

Check IP and IP covers.

Check to see if basin and stainless steel sinks fit tap specified.

Check flushing action of urinals.

Check required code for disabled requirements.

Check soap and paper holders are fixed in position.

Tiling

Specify junction of wall and floor tiles to have silicone joint to comply with Minister’s Specification.

Specify expansion control joints in wall tile over masonry joints and structural steel columns.

Specify floor tiles to be acid cleaned after laying.

Specify cove tiles if required.

Specify caulk joint at all fixtures, i.e. benches, basins, pans.

Specify brass strip height at doorways to match adjacent floor finish.


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Check tiling setout.

Check floor falls 1:80, 1:60 all wet areas.

Woodwork

Do not use rainforest timber species, i.e. meranti, mahogany in design.

Specify all exposed PAR timber, internal and external, to be primed all round before being fixed, e.g. fascias, skirtings, architraves, linings, timber sills.

Specify mill machine marks to be removed by sanding from PAR timber prior to priming.

Specify fixings to meet Australian Standards.

Specify fixing of bottom plates to concrete floor to code.

Check over straps to beams, studs and truss tie downs.

Check stress grade of timber specified.

Civil and structural

Introduction

Inspection certified by an engineer shall be undertaken of at least:

founding material of footings;

footing inspection;

structure inspection including roof frame;

truss calculations if timber truss roof;

earthworks/base;

reinforced concrete;

structural concrete;

drainage; and

pavements.

Concrete

Approve formwork material for class of finish specified.

Check either plastic or water sealing cure of concrete is carried out.

Check concrete floor finish specified and ensure concrete surface is not burnished.

Check reinforcement cover.

Check the concrete test results.

Check mpa strength of concrete.

Check plastic membrane under reinforcement, ensure there are no penetrations which have not been correctly taped and sealed.


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External Sewer

Similar to stormwater plus the following.

Obtain operating/maintenance manual for pump station, treatment plant.

Check stormwater cannot enter system.

Check flood gully provides adequate protection.

Check operation of grease arrestor pits and adequate provision.

Check adequate bunding and protection (e.g. roof) for items eg wash down, garbage collection areas, where spillage likely.

Check us of oil/water plate separator where waste is contaminated by oil.

Confirm SA Water/SA Health Commission approval.

General

Specify to protect areas around existing trees within drip line.

Specify record quantities of rock excavation.

Specify approved filling to all areas.

Specify service trenches to be filled with quarry sand to 90% compaction within 4 metres of building, under paving and roadways.

Specify compaction test results to be approved before slab is poured.

Specify amount of compaction tests.

Specify sawcut existing bitumen/concrete pavements.

Approve termite barrier.

Check materials schedule for floor slabs, paving, unpaved external areas and service trenches.

Check depth of topsoil on completion.

Check thickness of specified base-sub-base layers.

Check site once topsoil is stripped (sub base) (bad ground).

Check service trenches prior to backfilling.

Check suitability of excavated material for reuse.

Check excavation around trees within drip line to prevent damage to roots.

Check existing services located and marked.

Check soil erosion and drainage management plan where one is required, otherwise ensure no pollution of stormwater from site.

Check location for stockpile of topsoil acceptable.

Check setting out and “important dimensions correct”.

Check TBM.

Check tree audit done.

Check adequate FFL so that no flooding of buildings and adequate overland flood path around buildings.


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Check specified compaction levels.

Check specified no/frequency of tests and locations.

Check trees to be removed/retained with client and protective measures (ensure contractor is aware of importance of these trees).

Check backfilling material is appropriate.

Irrigation System

Specify adequate flow and pressure for design.

Specify head to head coverage of sprinklers on grassed areas.

Specify backflow prevention device with documented SA Water approval.

Specify adequate garden watering points.

Check operation of system and that it provides adequate coverage.

Check pipework tested if required.

Check pipework rating.

Check bedding and backfill and cover.

Check dripper system – filter drippers (2 or 3 per tree).

Check maintenance and operating manual with work as executed drawings.

Check client representative (grounds-person) has been instructed in operation.

Check top of sprinklers level with turf.

Check valve boxes in ground areas 150 below grass.

Check backflow prevention device installed and ensure compliance certification issued.

Landscaping

Specify advanced plants to be ordered early.

Check samples of plants.

Check sample of topsoil, mulch.

Check subgrade.

Check after topsoil placed before grassing and planting.

Check thickness of topsoil.

Check holes excavated and prepared for planting.

Check germination, ie dense continuous sward of healthy grass.

Check quality of plants and trees.

Check stakes.

Check tree energy carried out by qualified sub-contractor.

Check during maintenance period ensure mowing, weeding, fertilising, replanting etc is undertaken.

Check outstanding areas not planted/grassed.


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Check all areas assessed for planting.

Paving

Specify finished level of paving to be under DPC level.

Specify saw cut masonry paving around downpipes, IP’s and fence posts and columns etc.

Specify paving to be ramped 12mm around gullies, buffer tanks.

Specify to provide concrete edge restraints to all masonry paving.

Specify control joints and expansion joints in concrete paving a 2 metre centres.

Specify polysulphide joint to be fitted between building and paving and expansion joints at 6 metre centres.

Specify finish of contract paving.

Check specified base under masonry and concrete paving.

Retaining Walls

Check adequate foundation.

Check adequate footing.

Check adequate concrete cover.

Check adequate minimum reinforcement.

Check adequate drainage behind wall.

Check adequate fixing of fence to wall.

Check concrete strength.

Roadworks

Specify line marking to be approved water-based road marking point.

Specify for sprayed surface check aggregate firmly embedded in the binder. Ensure not excess of bituminous material.

Check subgrade.

Check materials for sub-base and base.

Check thickness of layers.

Check tolerances on finished surfaces.

Check compaction results for each layer.

Check asphalt surface tight finish not long.

Sewer

Similar to stormwater plus the following.

Specify obtaining SA Water, Local Government Authority/SA Health approvals.

Check pump station – quality of components and chamber and extent of controls required.


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Check that all work to meet relevant standards and DPTI guidelines.

Check that vent pipes are located 6m from any fresh air intake point.

Stormwater

Specify relevant standards and DPTI guidelines.

Specify tests required, stormwater to be flushed at practical completion.

Specify sewer class SH for stormwater in PVC pipework.

Specify types of grates and covers in pits.

Specify provision of stormwater soil erosion and drainage management plan if required.

Witness that Council approvals obtained.

Confirm design intent of system and ensure contractor is aware.

Specify that all pits are provided with a smooth, seamless finish using steel trowelled render or concrete cast in steel forms.

Specify sufficient notice by the contractor so that inspections of all underground services can be made at both excavated and concealed stages.

Specify quarry sand to be compacted to a height of 300mm above pipework.

Specify all drainage pipework to be laid with metal detectable strip tape maximum 450mm below FFL.

Check agricultural seepage drains required (e.g. behind retaining walls).

Check if flexible connections at building line.

Check adequate protection of buildings from flooding and provision of overland flow paths around buildings.

Check stormwater pipework is sewer class SH.

Check SIO’s.

Check correct grates to pits.

Check downpipe connections.

Check gravity system achieved – generally assess system will work. Also flood path around buildings, building not flood.

Check smooth finish of connection of pipes to concrete pits. Manholes.

Check pits, manholes and system clean.

Check flexible connections installed if specified/required.

Check stormwater system adequately protected from contamination of pollutants.

Check cover to pipework.

Check that Contractor has shored up trenches where excavation to depth is a danger and could collapse.

Check compaction of trench base.

Check bedding material of drain.


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Obtain operation/maintenance manual for pump station, check operation and that responsible person from client knows how system operates.

Obtain ‘work as executed’ drawings.

Structural Steel

Specify all fixings to purlins for suspension of ducts, ceiling hangers, electrical cable trays shall be through web of the section.

Specify base plates are grouted prior to brickwork commencement.

Specify all bolts to be galvanised.

Check coating thickness of treatment to structural steel.

Check amount of wall ties to be fixed to structural columns for bracing purposes.

Check trimmers allowed for penetration through roof hip and valleys for sheet fixings.


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Electrical

Introduction

Inspection shall be undertaken of at least:

first fixing;

on completion of 50% of fixing; and

commissioning.

Cabling

Specify mechanically protect vertical cables.

Specify all wiring chased into walls shall be protected by PVC rigid conduit, with the distance from the top edge of the conduit to the wall surface being a minimum of 15mm.

Check that the correct size multi-strand cables are used for light and power circuits.

Check cables are fastened correctly - cable pin clips – catenary in T-bar ceilings.

Emergency Exit Lighting

Specify fittings are tested every 3 months during defects liability period.

Check to see if Test Facility works.

Check to see if Push Button housing has been tightened properly.

Check to see if the Red Diode is alight when batteries are recharging.

Lighting

Specify the number of luminaires per circuit does not exceed 8 amps.

Specify high intensity discharge lighting to have accompanying immediate energised luminance lighting (i.e. fluorescent or LED).

Specify maintenance of light fittings during defects liability period.

Specify circuit identification on all switches.

Specify all general light switches to be mounted at 1000mm above floor level (AFL).

Specify all light switches shall have mechanism holding screws.

Check to see that all light fittings are earthed.

Check that there is an earth wire at all light fittings.

Check that new lamps and tubes are used in new fittings or lighting upgrade.

Main Earth Design

Specify:

- earth stake bonding – earth pit (AS/NZS3000 – AS/NZS 3008 Electrical installations).


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- water pipe bonding – of installation (AS/NZS3000 – AS/NZS 3008 Electrical installations)

- mechanically protect main earth connection and protect from corrosion.

Main Electrical Service - Submains

Contact SAPN – arrange for an onsite inspection to discuss service position and type of service. Take digital photographs of the site area including power authorities overhead powerlines and SAPN consumer mains positions.

Contact the SAPN Regional Depot for:

- confirmation of the voltage of aerial cables; and

- size of SAPN trust fuses at the stobie pole, padmount transformer, underground consumer mains located in turrets or wall mounted fuse box.

Familiarise office of the Technical Regulator with project and obtain a copy of the document, Building Safely Near Powerlines.

Specify maximum demand calculated for total site.

Specify each end of pipe sealed.

Check size of cables – all cables shall be the same size, i.e. full size neutrals.

Check size of conduits and number of cable conduit.

Check depth of trench – marker tape – compacted sand with no rocks.

Mounting Heights

Specify 1000mm AFL or 150mm above bench top or desks; office areas 500mm AFL.

Specify general power outlets in child care centres 1200mm AFL.

Specify general power outlets in laboratories 350mm above bench tops, floors, sides of cupboards.

Isolating Switches

Specify hot water services (adjacent to the appliance) - 9 litre or greater to be hardwired from a weatherpoof switch to the hot water service via corrugated conduit with the correct terminators and accessories.

Specify hand driers - hard wired with the isolating switch mounted at 2200mm AFL.

Exhaust Fans

Specify general power outlets adjacent to the fan or mounted on the external side of the fan.

Air Conditioners - Split Unit

Specify isolating switch adjacent to the compressor unit inside the cage to protect the unit.

Specify isolating switches not to be mounted on the unit, but on wall or upstands near unit, or within cages.


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Room Airconditioner – Window/Wall

Specify mounted above 2000mm.

Specify switch socket outlet adjacent to the unit wired from a no volt release isolating switch mounted at 1300mm AFL.

Machinery

Specify adjacent to the magnetic on/off starter hi-impact IP56 rated with lock off facility.

Laboratories

Specify separate isolators with a mushroom head, push off, key release, mounted at 1300mm – 1500mm AFL installed for the gas solenoid valve and power switched socket outlets.

Mounting of Switchboards on Concrete Plinths

Specify to vermin seal the end of all conduits.

Specify protect board from the elements.

Check for sealing of the base of the board to the concrete plinth.

Power Circuits

Specify maximum number of power outlets as:

- 12 @ 10 amp outlets – where heating and cooling is installed; or

- 6 @ 10 amp outlets – where no heating and cooling is installed

Specify RCD protection does not apply to stoves, hot water heaters.

Specify laboratory power outlets shall have a push button off key operated release, isolating switch adjacent to the main doorway. This is associated with a similar gas isolating switch.

Specify cable shall be clipped down vertical studwork where insulation is installed between wall linings.

Specify the correct polarity of all power outlets. Beware of hazardous areas, laboratories, sinks, fume cupboards, tilt baths, extendable eye washers etc.

Specify circuit identification on all power outlets and fixed appliances.

Specify separate power circuit for Telstra equipment.

Specify no power outlet shall be mounted on a horizontal surface.

Specify where power outlets are mounted on metal partitioning, that the partitioning is earthed and provide a shroud to cover the back of the outlet.

Specify window/wall mounted reverse cycle air conditioner power outlets to be no volt release type.

Project Completion

Check for marker plates and directional arrows to underground cable runs

Check IPA number studs – IPA letter studs.


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Check typed legend with neutral numbers filled in.

Check certificate of compliance provided by contractor.

Data – Computer Installations General

Specify segregation of a minimum distance of 300mm between data cabling and 240 volt cabling.

Specify all outlets shall be marked to correspond to the legend at the patch panel.

Specify a data print out sheet required for all computer cables/data outlets.

Check that all terminations are made correctly.

Trenches

Specify bitumen/concrete shall be cut by an appropriate masonry saw in two (2) parallel cuts.

Specify trench shall be dug to a minimum depth so that the top of pipe is 500mm below surface ground level in light traffic areas.

Specify pipework shall be of heavy duty rigid PVC, category A.

Specify back fill with sand compacted in layers up to 300mm.

Specify place orange cable marker tape along the length of the trench.

Specify back fill the remainder of the trench, compact in layers – clean filling 150mm topsoil.

Specify check for large stones and small rocks being backfilled into the trench.

Specify all excess soil shall be removed from the site.

Specify reinstate trench surface to match the existing adjacent surface.

Specify install marker plates and directional arrows at each end of the trench, at any change of direction and at a distance no greater than 50 metres.

Switchboards (Main and Distribution Boards)

Specify that there is a makers plate on the board.

Specify that there is a traffolite label on the board’s door.

Specify a minimum space capacity of 30% is required on all distribution boards.

Specify a minimum space of 600mm is required in front of all distribution boards.

Specify switchboard doors are to open to 180o.

Specify no distribution board should be installed on an outside wall, exposed to the elements.

Specify a notice at the main entrance of a commercial installation – describing the location of the main switchboard.

Minimise the need for free standing main switchboards in outside situations.

Check the type of RCD circuit breaker for pole space.


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Check that there is an RCD log book in the switchboard with test results for all RCD circuit breakers.

Check that there is a typed legend in the card holder on the inside of the distribution board door.

Check all terminations for tightness.

Mechanical And Hydraulics

Introduction

Inspection shall be undertaken of at least:

air-conditioning;

pipework in ground and walls;

mechanical services commissioning;

under floor drainage;

sewer and stormwater external and internal to building;

hot and cold water at first fix;

hot and cold water at second fix; and

sanitary fixtures second fix.

Access for maintenance

Ductwork

Specify access for balancing to be allowed for in particular for flushed ceilings.

Specify acoustic insulation to be sealed on all joints with metal stripping.

Specify liaise with building trades for roof penetrations and flashing requirements.

Specify flexible ductwork should be supported off ceiling.

Specify flexible ductwork standards (many inferior makes).

Specify maximum of two (2) lengths of flexible ductwork per outlet.

Specify sealing of ductwork on roof.

Specify label location of fire dampers.

Specify ductwork transverse jointing (see Natspec systems and specify only those required not pages of alterations).

Specify standard registers and grilles wherever possible.

Specify ductwork flange joint type.

Check that all work meets relevant standards and DPTI guidelines.

General

Ensure existing services are researched and noted on drawings and in specification. Check DPTI drawing archives.


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Ensure adequate electrical power provided for specified installations.

Specify mechanical plant cages to meet DPTI standards unless otherwise agreed. Cages to enclose all pipework and isolation switches.

Specify all condensate drains are to be plumbed to a suitable point. Refer to EPA guidelines. (Use of condensate pumps to be a last resort. If used, centrifugal pump type to be specified.)

Specify permanent connections provided at contractor’s cost and list those required.

Specify any samples requiring approval prior to installation.

Specify requirements for trenching and backfilling the same as for other services.

Specify authority approvals/compliances as follows.

- SAPN

- Backflow prevention services.

- Gas services installations.

- Fire services.

- NATA certificate for fume cupboards.

- Water Supply Authority.

Specify testing as follows.

- Specify test procedures and parameters.

- Provide copies of factory tests certificates of chiller and air conditioning.

- Provide copies of test procedures.

- Provide up to date testing equipment calibration certificates.

- Provide noise level acceptance test results.

- Client training is essential. In particular allow time for building maintenance services training. A copy of the practical completion (or equivalent) outstanding items list should be provided to the DPTI Project Manager and Construction Adviser Mechanical and Hydraulics.

- DPTI Construction Adviser Mechanical and Hydraulics is to be notified of commissioning and testing procedures and attend same.

- Provide hydraulic test approvals and certificates.

Check that all work meets relevant standards and DPTI guidelines.

Secondary Schools Science Rooms - New and Upgraded

Ensure a copy of Secondary School Science Room Data Sheets is acquired from DPTI Project Manager.

Specify backflow prevention and associated labelling.

Specify a NATA endorsed certificate for each fume cupboard.

Specify centrifugal fans mounted external to building for fume cupboards.

Specify gas and electrical isolation to science rooms to be via separate push buttons keyed to energise. Signage as per data sheets.


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Specify fixed outlet tapware over laboratory sinks.

Specify separate flues for each side of chemical storage cabinets.

Specify signage for chemical storage cabinets, flammable liquids cabinets and chemical storage room.

Specify fresh air inlet to chemical storage room.

Specify labelling of pipework and signage in rooms served with non potable water.

Specify fresh air supply for rooms with fume cupboard.

Specify additional exhaust fans for science rooms (may be required to comply with code).

Specify emergency showers and eyewash systems.

Specify hot water to demonstration bench and preparation room.

School Activity Halls

Specify cages around radiant heaters. Use DPTI standard detail (cage independent to heater).

Specify gas radiant heaters to be switched separately from central panel (by electrical services).

Specify manufacturer’s recommended mounting heights of gas radiant heaters.

Child Care Centres

Specify backflow prevention for nappy change area.

Specify thermostatic mixing valve for temperature control of water in nappy change and where hot and cold services are provided in child accessible areas. A fail safe system is required.

Specify detailed maintenance and operating instruction manual.

Maintenance and Operating Instructions

Specify that all appliances have adequate provision to be serviced and maintained and document.

Specify maintenance and operating instructions to cover all components of the installation including hydraulic and mechanical services ie gas and water services, contact details for system suppliers; list of any lead agency training undertaken and copies of authority compliance certification and testing results.

Specify as installed drawings in particular in ground water, gas, fire and irrigation. Pipework should be dimensioned from permanent buildings etc.

Specify adequate training by the sub-contractor/supplier is arranged by the Contractor for the lead agency representative(s) where BMS or digital controls are provided.

Check manuals and arrange for all corrections prior to forwarding to the DPTI Project Review Officer for distribution.

Pipework Fittings And Valves

Specify jointing on small sizes of pipework to be as per Australian Standards. Pinched jointing of large sizes to small not acceptable.


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Specify that pipes shall not be supported with plastic electrical brackets.

Specify that pipe hangers shall not be fixed to bottom flanges of roof purlins.

Specify separation of piped services and electrical conduits in trenches as per Australian Standards.

Specify appropriate penetration treatment for pipework, ie fire rated walls, vibration and dissimilar materials.

Specify that take-offs from main runs should be from top of pipe on compressed air system pipework.

Specify valve connections to be demountable on at least one side of valve.

Specify adequate water, gas and other services isolation to minimise shut down inconvenience.

Specify pipework in ceiling spaces and ducts to be clearly identified.

Specify pipework identification. Identification colour coding of piped services exposed in technical training facilities.

Specify exposed pipework to be painted, in particular roof mounted pipework.

Specify drains on a roof should be made in copper rather than PVC.

Specify insulation of chilled and heating water in plantrooms to be metal sheathed to 1800mm AFL and foil finished above.

Specify external insulated refrigeration pipework to be protected with metal sheeting or capping.

Specify fire service backflow prevention devices.

Check all specified pressure testing is carried out.

Contact

For further information contact:

Manager Safety and Professional Services

Telephone: 08 8343 2230

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