THE FOLLOWING SPECIFICATION MUST BE READ IN CONJUNCTION WITH ALL ARCHITECTURAL GENERAL ARRANGEMENT DRAWINGS, SCHEDULES ETC. AND IS APPLICABLE WHETHER SPECIFICALLY REFERRED TO OR NOT. IT IS THE RESPONSIBILITY OF THE CONTRACTOR/SUB-CONTRACTOR TO ENSURE THAT ALL THEIR WORK IS IN COMPLIANCE WITH THE APPROPRIATE REQUIREMENTS OF THE RELEVANT BUILDING REGULATIONS, NHBC STANDARDS AND OTHER ALLIED LEGISLATION.
ALL MATERIALS ARE TO BE USED AND INSTALLED IN ACCORDANCE WITH THE RELEVANT MANUFACTURER'S INSTRUCTIONS AND RECOMMENDATIONS. ALL NEW SERVICES ARE TO BE PROVIDED IN ACCORDANCE WITH THE STATUTORY UNDERTAKER'S REQUIREMENTS. THE QUALITY OF ANY MATERIAL SHALL NOT BE LOWER THAN THAT DEFINED IN THE RELEVANT BRITISH STANDARD, OR THAT THE MATERIAL HAS BEEN SATISFACTORILY ASSESSED BY AN APPROPRIATE INDEPENDENT AUTHORITY I.E. BBA, BRE. THE CONTRACTOR/SUB-CONTRACTOR MUST ENSURE THAT MATERIALS ARE 'FULLY SUITABLE' FOR THEIR LOCATION AND THAT ALLIED MATERIALS/BACKGROUNDS ARE APPROPRIATE. WHERE THERE IS NO LEGISLATED STANDARD, THE QUALITY AND USE OF THE PRODUCT SHALL BE IN ACCORDANCE WITH ESTABLISHED SATISFACTORY CUSTOMS AND PRACTICES. ALL WORK SHALL BE CARRIED OUT IN A SOUND, NEAT, DURABLE AND WORKMANLIKE MANNER. REASONABLE PRECAUTIONS SHALL BE TAKEN TO PROTECT FIXED AND UNFIXED MATERIALS AGAINST ANY DAMAGE LIKELY TO AFFECT THE FINISHED QUALITY OF THE BUILDING.
ALL CONTRACTORS/SUB-CONTRACTORS MUST ENSURE TO THEIR OWN SATISFACTION THAT THEY ARE IN POSSESSION OF THE CURRENTLY ISSUED DRAWINGS AND DETAILS, BEFORE COMMENCING THE RELEVANT 'WORK-STAGE' ON SITE.
NOTE: UNLESS STATED ALL CONSTRUCTION DETAILS ARE TO BE IN ACCORDANCE WITH THE ROBUST DETAILS DOCUMENT -LIMITING THERMAL BRIDGING AND AIR LEAKAGE PUBLISHED BY DTLR.
THE PRINCIPLE CONTRACTOR IS TO ENSURE THAT THE PROVISIONS OF THE CONSTRUCTION DESIGN MANAGEMENT (CDM) REGULATIONS ARE CARRIED OUT FULLY, INCLUDING ALL NOTIFICATIONS OF WORK REQUIRED UNDER LEGISLATION, PRIOR TO START OF WORKS.
FOUNDATIONS
THE EXISTING GROUND WITHIN THE EXTENT OF THE PROPOSED BUILDING CONSTRUCTION SITE SHALL BE CLEARED OF ALL TURF AND VEGETABLE MATTER PRIOR TO ANY FURTHER EXCAVATION BEING MADE. METHOD OF DISPOSAL OF ANY CONTAMINATED SOIL TO BE AGREED WITH THE LOCAL ENVIRONMENTAL OFFICER. FOUNDATION TRENCHES SHALL BE CLEAN AND TRUE AND CHECKED FOR SOFT AREAS, WATER ETC. AND LEFT WITH COMPACTED BOTTOMS.
FOUNDATIONS SHALL BE LOCATED CENTRALLY UNDER EXTERNAL AND LOAD BEARING INTERNAL WALLS UNLESS IS IT INDICATED IN ARCHITECTURAL DRAWINGS. ALL FOUNDATIONS SHALL BE DESIGNED WITH DUE REGARD TO SUBSOIL CONDITIONS, WATER TABLE, PRESENCE OF SULPHATES AND PREVIOUS GROUND USES ETC. DEPTH OF THE FOUNDATIONS TO SUIT SOIL CONDITIONS, ORIGINAL AND PROPOSED GROUND LEVELS, DRAINAGE TRENCHES AND PROXIMITY OF TREES/HEDGES, ALL TO THE SATISFACTION OF THE RELEVANT BUILDING CONTROL AUTHORITY/NHBC INSPECTOR. READY MIXED CONCRETE WILL ONLY BE ACCEPTABLE FROM SUPPLIERS USING A FULL QUALITY CONTROL SYSTEM.
ENTIRE FOUNDATION DESIGN TO BE IN-ACCORDANCE WITH STRUCTURAL ENGINEERS DESIGN DRAWINGS AND CALCULATIONS.
CONTRACTOR / SUB-CONTRACTOR TO MAKE SURE THERE IS NO ENCROACHMENTS ON SITE.
ALL DRAINAGE WORKS SHALL BE IN FULL ACCORDANCE WITH APPROVED DOCUMENT H OF THE BUILDING REGULATIONS, BS 8301 AND TO THE COMPLETE SATISFACTION OF THE RELEVANT BUILDING CONTROL BODY.
WHERE DRAINS PASS THROUGH EXTERNAL WALLS THEY ARE TO BE PROTECTED WITH A PRE-STRESSED CONCRETE LINTEL OVER (AS DESIGNED BY ENGINEER) WITH MIN. 150MM END BEARINGS, WITH 150MM CLEARANCE ALL ROUND PIPE AND THE OPENING IS TO BE MASKED WITH RIGID SHEET MATERIAL TO PREVENT THE INGRESS OF VERMIN OR FILL.
IF APPLICABLE, REFER TO DRAINAGE ENGINEER'S DETAILED DRAWINGS FOR DRAINAGE LAYOUT AND SPECIFICATION DETAILS.
GROUND FLOOR CONSTRUCTION
GROUND FLOOR CONSTRUCTION AS INDICATED IN ARCHITECTURAL GENERAL ARRANGEMENT DRAWINGS AND TO BE CONFIRMED BY ENGINEER.
GROUND BEARING FLOOR: 75MM REINFORCED SAND/CEMENT SCREED (UNDER FLOOR HEATING TO SPECIALIST'S DESIGN -TO BE CONFIRMED BY THE END USE) ON 1200G POLYTHENE PROTECTION LAYER ON 100MM GA4000 CELOTEX INSULATION (FF4000 FOR UNDER FLOOR HEATING) OR SIMILAR APPROVED ON 1200G DPM ON 150MM CONCRETE GROUND BEARING FLOOR SLAB WITH A393 MESH REINFORCEMENT WITH MIN. 50MM COVER, (ENGINEER TO CONFIRM), ON BRICK BALLAST/CRUSHED STONE BASE ON WELL COMPACTED SOIL 25MM CELOTEX INSULATION STRIP TO BE PROVIDED TO ALL PERIMETER WALLS. CONSTRUCTION TO ACHIEVE U-VALUE OF 0.16
PLEASE NOTE FOR EXTENSIONS ANY EXISTING FLOOR VENTS TO BE CONNECTED WITH 4" PIPE AND VENTED TO EXTERNAL LEAF.
MOVEMENT JOINTS
REFER TO FLOOR PLANS AND STRUCTURAL ENGINEERS DETAILS FOR RECOMMENDED LOCATION OF MOVEMENT JOINTS TO OUTER LEAF BRICKWORK/BLOCKWORK, GENERALLY TO BE PROVIDED AT NOT GREATER THAN 6 METRE CENTRES FOR BLOCKWORK AND 12-15 METRE CENTRES FOR BRICKWORK. MOVEMENT JOINTS TO BE 10MM MINIMUM WIDE, LOCATED BEHIND RAIN WATER DOWN PIPES WHERE POSSIBLE AND FORMED WITH PROPRIETARY POLYURETHANE SEALING STRIP, WITH FLAT TIES BETWEEN PANELS AT 450MM VERTICAL CENTRES WITH ONE END DE-BONDED WITH POLY-SULPHIDE SEALANT TO EXTERNAL FACE OF BRICKWORK -COLOUR TO MATCH. NOTE PROVIDE CAVITY WALL TIES WITHIN 150MM HORIZONTALLY, AT 225MM MAXIMUM VERTICAL CENTRES, EITHER SIDE OF MOVEMENT JOINTS.
EXTERNAL CAVITY WALL
CAVITY WALLS TO COMPLY WITH BS 5628.
300MM EXTERNAL WALL CONSTRUCTION ABOVE DPC COMPRISING 100MM AIRCRETE BLOCKWORK (TC=0.11) INNER SKIN, STRENGTH TO BE 7.3 N/MM.SQ, 12.5MM PLASTERBOARD ON DABS, STRICTLY IN ACCORDANCE WITH THE MANUFACTURER'S RECOMMENDATIONS. ALL WALLS ARE TO RECEIVE A PLASTER SKIM FINISH READY TO RECEIVE DECORATION.
CAVITY TO BE FULLY FILLED WITH 97MM KNAUF SUPAFIL 37 (TC=0.037) OR SIMILAR APPROVED IN ACCORDANCE WITH MANUFACTURERS DETAILS.
OUTER LEAF GENERALLY TO BE 102.5MM (FL DURABILITY) FACING BRICKWORK TO LOCAL AUTHORITY APPROVAL. TOTAL EXTERNAL CAVITY WALL TO ACHIEVE MINIMUM 'U' VALUE 0.26 W PER M2K.
EXTERNAL RENDER/CLADDING FINISH:
CAVITY TO BE FULLY FILLED WITH 100MM KNAUF SUPAFIL 37 (TC=0.037) OR SIMILAR APPROVED IN ACCORDANCE WITH MANUFACTURERS DETAILS.
OUTER LEAF GENERALLY TO BE 100MM DENSE CONCRETE EXTERNAL QUALITY BLOCKWORK WITH MONOCHROME RENDER / CLADDING OUTSIDE TO LOCAL AUTHORITY APPROVAL. TOTAL EXTERNAL CAVITY WALL TO ACHIEVE MINIMUM 'U' VALUE 0.26 W PER M2K.
THE CAVITY IS TO BE FILLED WITH A LEAN MIX CONCRETE UP TO A LEVEL OF 225MM MINIMUM BELOW DPC & IS TO BE LAID WITH SULPHATE RESISTANT MORTAR. PROVIDE PERPEND WEEPHOLES EVERY FOURTH VERTICAL JOINT N THE OUTER LEAF AT THE BASE OF THE CAVITY AT 150MM BELOW D.P.C.
PROVIDE PROPRIETARY INSULATED CAVITY CLOSERS AT ALL WINDOW/DOOR OPENINGS AND CLOSE CAVITY AT TOP WITH INSULATED LINTEL.
INTERNAL WALLS
DAMP PROOF COURSE
HORIZONTAL DAMP PROOF COURSE TO BE MINIMUM 150MM ABOVE ADJACENT GROUND LEVEL. A SECONDARY DPC WILL BE PROVIDED 150MM ABOVE FLOOR LEVEL FOR MINIMUM DISTANCE OF 1.5M FROM ALL EXTERNAL DOORS WITH A LEVEL THRESHOLD. DPC/ CAVITY TRAY TO BE MARLEY AQUAGARD OR SIMILAR APPROVED AND IS TO BE INSTALLED STRICTLY IN ACCORDANCE WITH THE MANUFACTURERS INSTRUCTIONS AND RECOMMENDATIONS.
IF THE EXTERNAL GROUND LEVEL IS EQUAL OR ABOVE THE INTERNAL FINISH FLOOR LEVEL, THEN DOUBLE DPC TO BE PROVIDED, ONE AT FINISHED FLOOR LEVEL AND THE SECONDARY 150MM ABOVE EXTERNAL GROUND LEVEL. BOTH HORIZONTAL DPC'S TO BE CONNECTED WITH AND VERTICAL LAYER OF DPC ALL IN ACCORDANCE WITH ARCHITECTURAL DESIGN AND DETAILS.
CAVITY CLOSURE TO ALL WINDOWS AND DOORS TO REPLACE ALL VERTICAL DPC'S AND IN ORDER TO AVOID COLD BRIDGING.
THE HORIZONTAL DAMP PROOF COURSE SHALL CONSIST OF A LAYER OF 2000 GAUGE POLYTHENE DAMP COURSE TO BS 743/6515 ADEQUATELY LAPPED AT CORNERS AND JOINTS AND LAID ON A MORTAR BED.
WHERE EXTERNAL WALL CAVITY IS BRIDGED I.E. AIR BRICK/VENTILATOR OPENINGS AND METER CUPBOARD ETC. PROVIDE POLYTHENE CAVITY TRAYS COMPLETE WITH STOP ENDS OVER IN THE EXTERNAL WALL WITH OPEN PROPRIETARY PERPENDS. CAVITY TRAYS ARE TO PROJECT 150MM BEYOND EITHER SIDE OF LINTEL/OPENING.
AT ALL ROOF ABUTMENTS I.E PORCHES, GARDEN ROOMS ENSURE STEPPED
D.P.C'S CAVITY TRAY WITH STOP ENDS ARE PROVIDED AND LINKED TO CODE 4 LEAD FLASHINGS AND SOAKERS. CODE 4 LEAD DRESSED BENEATH CAVITY TRAYS AND OVER ROOF SLOPES WITH ALTERNATE PERPENDS LEFT OPEN FOR WEEPHOLES ALL AS NECESSARY TO FORM WEATHER PROOF JUNCTION. ALL LEADWORK TO SOAKERS, FLASHINGS, VALLEYS ETC. ARE TO BE IN COMPLIANCE WITH THE RECOMMENDATIONS OF THE LATEST EDITION OF THE LEAD SHEET ASSOCIATION'S 'GUIDE TO GOOD PRACTICE'.
INTERNAL PARTITIONS TO BE BRITISH GYPSUM 'GYPWALL' METAL STUD-PARTITIONING SYSTEM OR APPROVED TIMBER STUDS, TOTAL OVERALL THICKNESS 95MM. USING 70MM METAL /TIMBER STUDS AT 600MM CTRS. WITH 12.5MM BRITISH GYPSUM 'SOUNDBLOC' BOTH SIDES (MOISTURE RESISTANT TO BATHROOM & ENSUITES). PARTITION TO ACHIEVE 40DB SOUND REDUCTION.
ADDITIONAL 12.5MM STRUCTURAL PLY BOARD TO BE ADDED BETWEEN/ABOVE BATTENS TO SUPPORT THE KITCHETN/BATHROOM FITTINGS AND APPLIANCES.
ROOF CONSTRUCTION
ROOFING TILES AS SPECIFIED IN ARCHITECTURAL DRAWINGS (TO BS 5534 PT.1
AMENDED 1981) LAID WITH PITCH AND LAP IN ACCORDANCE WITH MANUFACTURER'S INSTRUCTIONS ON 50X38MM SW BATTENS (SIZE TO BE IN ACCORDANCE WITH BS 5534) ON 'TYVEK SUPRO' OR SIMILAR APPROVED VAPOUR PERMEABLE BREATHER MEMBRANE. MEMBRANE DRESSED INTO GUTTERS ON 'TYVEK' EAVES CARRIER. ON SW PRE FABRICATED TRUSSED RAFTERS AND BRACINGS TO BS 5268 PART 3 1985, AT MAX 600 CTS. 30X5G.S RESTRAINT STRAPS AT VERGE AND CEILING LEVEL. PROVIDE AND BED ON 1:1:6
MORTAR 100X50MM SW TREATED WALL PLATE WITH RESTRAINT STRAPS TO WALL PLATE AT MAX 2 M CTS. TO BS 5628 PART 1. ALL EXTERNAL TIMBERS TO BE PRESERVATIVE TREATED.
SLOPING CEILING -MINIMUM 150MM DEEP LOOSE RAFTERS / TRUSS RAFTERS AT 400C/C TO ROOF MANUFACTURER'S OR ENGINEER'S DESIGN AND DETAILS. AT SLOPING SCEILING, BREATHABLE ROOFING MEMBRANE WITH 100MM CELOTEX GA4000 OR SIMILAR APPROVED INSULATION BETWEEN RAFTERS WITH MIN 50MM VOID OVER INSULATION AND CELOTEX GD5025 (25+9.5) OR EQUIVALENT UNDER RAFTERS WITH VAPOUR CHECK LAYER, ROOF CONSTRUCTION TO ACHIEVE MIN. U-VALUE OF 0.18
FLAT ROOF AT RAFTER LEVEL (WARM FLAT ROOF) FIBER GLASS WATER PROOFING LAYER OR SIMILAR APPROVED TO MANUFACTURER'S INSTRUCTIONS AND DETAILS. ON 18MM OSB 3 BOARD, ON 120MM CELOTEX RIGID INSULATION OR SIMILAR APPROVED WITH VAPOUR CONTROL LAYER ON BOTH SIDES, ON 12MM OSB2 BOARD, ON SW FURRINGS TO GIVE MINIMUM 1:60 FALL, ON 150/200MM JOISTS (TBC BY ENGINEER), 15MM CEILING BOARD WITH VAPOUR CONTROL LAYER, CONSTRUCTION TO ACHIEVE U-VALUE OF 0.18
ALLOW FOR CUTTING THE OVERHANGING RAFTER FEET SQUARELY TO ACHIEVE PERFECT VERTICAL ALIGNMENT TO THE NEW FASCIA BOARDS, AS WELL AS A CONSTANT SOFFIT WIDTH.
TRUSSES TO BE SECURED TO WALL PLATES USING PROPRIETARY TRUSS CLIPS WITH NAILS FIXED THROUGH EACH AVAILABLE HOLE.
FORM HIPS AND RIDGE USING PROPRIETARY RIDGE AND BONNET HIP TILES, & CODE 5 LEAD ON VALLEY BOARDS IN ACCORDANCE WITH LEAD ASSOCIATION DETAILS,(ALTERNATIVELY A GRP VALLEY CAN BE USED AND INSTALLED STRICTLY IN ACCORDNACE WITH MANUFACTURES / SUPPLIERS GUJIDLINES AND RECOMMENDATIONS.
PROVIDE CAVITY TRAYS & CODE 4 STEPPED AND APRON LEAD FLASHINGS AT ABUTMENTS OF ALL ROOFS WITH WALLS, LEAD CHASED INTO WALLS AND WEDGED AT MAXIMUM 450MM CENTRES AND POINTED IN 1:3 CEMENT/ SAND MORTAR. PROVIDE SOAKERS TO HIPS, VALLEYS AND ROOF/ WALL ABUTMENTS.
PROVIDE CAVITY TRAYS & CODE 4 STEPPED AND APRON LEAD FLASHINGS AT ABUTMENTS OF ALL ROOFS WITH WALLS, LEAD CHASED INTO WALLS AND WEDGED AT MAXIMUM 450MM CENTRES AND POINTED IN 1:3 CEMENT/ SAND MORTAR. PROVIDE SOAKERS TO HIPS, VALLEYS AND ROOF/ WALL ABUTMENTS.
UPPER FLOORS
UPPER FLOOR IN ACCORDANCE WITH SPECIALISTS'S DESIGN AND DETAILS 18-22MM THICK MOISTURE-RESISTANT FLOORING TYPE C4 CHIPBOARD TO B.S 5669, ENSURE THROUGHOUT EDGES OF BOARDS SUPPORTED ON JOISTS OR NOGGINS, WITH 10MM EXPANSION GAP AT ROOM PERIMETERS BETWEEN CHIPBOARD AND WALLS.
BOARDS TO BE SECURELY FIXED THROUGH TO 50X200MM (TBC BY ENGINEER)
DEEP C24 TIMBER JOIST SYSTEM OR ATTIC TRUSSES AT CENTRES AS SPECIFIED BY SPECIALIST MANUFACTURER/ STRUCTURAL ENGINEER. THE ENTIRE FLOOR IS TO BE INSTALLED IN STRICT ACCORDANCE WITH THE MANUFACTURER'S INSTRUCTIONS -STANDARD DETAILS AND SETTING OUT
JOISTS TO BE SUPPORTED ON HANGERS AT PARTY WALL AND EXTERNAL WALL. AT PARTY WALLS THE JOISTS ARE TO BE SEALED FOR FIRE AND ACOUSTIC REQUIREMENTS IN STRICT ACCORDANCE WITH THE MANUFACTURERS INSTRUCTIONS.
UNDERSIDE OF JOISTS TO RECEIVE 12.5MM SOUNDBLOCK PLASTERBOARD CEILING, TAPED, SKIMMED AND SET FINISHED. FLOOR VOID TO HAVE 100MM THICK MINERAL FIBRE INSULATION FOR SOUND REDUCTION.
OVERALL CONSTRUCTION TO ACHIEVE MINIMUM AIRBORNE SOUND REDUCTION OF 40DB
WINDOWS AND DOORS
WINDOWS: UPVC WINDOWS STYLE TO MATCH AS INDICATED ON ARCHITECTURAL DRAWINGS. ALL FIRST FLOOR WINDOWS AND ABOVE TO BE DESIGNED WITH EASY CLEAN HINGES TO ALLOW FOR CLEANING EXTERNAL GLAZING FROM WITHIN ROOM. NO WINDOW OPENINGS FIRST FLOOR AND ABOVE TO BE LESS THAN 800MM ABOVE FINISH FLOOR LEVEL UNLESS SAFETY GLAZING & GUARDING, (REFER TO AD N1 AND GLAZING SPECIFICATION BELOW), PROVIDED TO AT LEAST THE HEIGHT OF 800MM FROM FFL. CHILD RETRACTORS TO BE FITTED.
WINDOWS/EXTERNAL DOORS TO ALL HABITABLE ROOM UPTO 4.5M FROM GROUND LEVEL TO BE EMERGENCY EGRESS WINDOWS WITH UNOBSTRUCTED OPENABLE AREA 0.33M² WITH MIN 450X450MM OPENING AND BOTTOM OF OPENING NOT MORE THAN 1100MM FROM FFL, ALL INACCORDANCE WITH AD PART B.
PROVIDE TRICKLE VENTILATOR UNITS TO HEAD OF WINDOWS PROVIDING 2500MM2 EQUIVALENT TO HABITABLE ROOMS AND STRICTLY ACCORDANCE WITH AD PART F.
WINDOWS TO BE FITTED TO PROVIDE A 30MM EXTERNAL REVEAL FROM THE FACE OF BRICKWORK AND TO OVERHANG CAVITY CLOSURES BY A MINIMUM OF 30MM.
DOORS: PROPRIETARY MADE. PROVIDE LEVEL THRESHOLD IN COMPLIANCE WITH BUILDING REGULATION REQUIREMENTS PART M, ACCESS FOR THE DISABLED
FRONT ENTRANCE DOORS TO BE PROVIDED WITH A LEVEL THRESHOLD AND RAMPED ACCESS IN ACCORDANCE WITH AD PART M.
DRAUGHT STRIPPING TO ALL EXTERNAL DOORS AND WINDOWS. MASTIC TO BE APPLIED BETWEEN FRAMES AND BRICKWORK INTERNALLY AND EXTERNALLY.
WINDOWS AND DOORS TO ACHIEVE A U-VALUE OF 1.6 W/M2K.
EXTENDED CILLS OF APPROPRIATE LENGTH ARE TO BE ALLOWED FOR AREAS OVER RENDER TILE HANGINGS/ STUB CILLS TO BE PROVIDED FOR WINDOWS ABOVE STONE CILL
GLAZING
ALL GLAZING TO WINDOWS BELOW 800MM AND GLAZING TO DOORS BELOW 1500MM INCLUDING SIDELIGHTS WITHIN 300MM HORIZONTALLY TO BE FITTED WITH LAMINATED SAFETY GLAZING TO BS 6206 1981. ALL HEIGHTS TO BE MEASURED FROM FINISHED FLOOR LEVEL.
GLAZING TO BE INSTALLED IN FULL ACCORDANCE WITH AD PART L OF THE BUILDING REGULATIONS. 24MM DOUBLE SEALED GLAZED UNITS WITH LOW E GLASS TO BE USED. OBSCURE GLASS TO WC AND BATHROOM WINDOWS.
SMOKE ALARMS
AUTOMATIC MAINS OPERATED SELF-CONTAINED SMOKE DETECTORS WITHIN EACH UNIT CONFORMING TO BS 5446 TO BE PROVIDED TO CEILINGS AT LOCATIONS INDICATED ON THE PLANS. ALARMS TO HAVE PERMANENTLY WIRED CONNECTION WITH BATTERY BACK UP, INTERLINKED ONE AT EACH FLOORAND PROVIDED WITH SEPARATE FUSED CIRCUIT AT DISTRIBUTION BOARD IN ACCORDANCE WITH CURRENT IEE REGULATION. ALARMS TO BE LOCATED MINIMUM 300MM CLEAR FROM ANY WALL OR FITTINGS, AND NOT LOCATED DIRECTLY ABOVE ANY RADIATORS.
HEAT ALARMS TO BE PROVIDED IN OPEN PLAN KITCHEN.
THE VENTILATION REQUIREMENTS ARE TO BE IN ACCORDANCE WITH THE BUILDING REGULATIONS 2006, WITH PARTICULAR REFERENCE TO THE FOLLOWING ITEMS:-
HABITABLE ROOMS -AN OPENING WINDOW OF 1/20TH (MINIMUM) OF FLOOR AREA, TOGETHER WITH A TRICKLE VENTILATION OPENING NOT LESS THAN 8000MM2 IN AREA TO HABITABLE ROOMS AND 4000MM2 ELSEWHERE DUCTING FROM EXTRACT FANS TO EXTERNAL AIR IS TO INCORPORATE CONDENSATION TRAPS. DUCTWORK SHALL FOLLOW THE SHORTEST PRACTICAL ROUTE TO THE EXTERNAL GRILLE WITHIN THE CONFINES OF STRUCTURAL VOIDS. ANY DEVIATIONS FROM THESE ZONES IMPACTING ON FINISHED ARCHITECTURAL SURFACE LEVELS MUST HAVE PRIOR APPROVAL KITCHEN -A COOKER HOOD WITH AN EXTRACT OF 30 LITRES PER SECOND, DUCTED TO EXTERNAL AIR WITH 15 MINUTE OVERRUN. EXTRACT FANS IN KITCHENS WITH WINDOWS NEED NOT HAVE 15 MINUTE OVERRUN BUT THE WINDOWS MUST BE OPENABLE AND HAVE TRICKLE VENTILATION OF 4000MM2.
BATHROOM -A MECHANICAL FAN WITH AN EXTRACT RATE OF 15 LITRES PER SECOND DUCTED TO EXTERNAL AIR WITH 15 MINUTE OVERRUN. WINDOWS IN BATHROOMS TO BE OPENABLE TOGETHER WITH TRICKLE VENTILATION OF 4000MM2.
UTILITY ROOM -WILL HAVE AN INTERMITTENT EXTRACT VENTILATION RATE OF AT LEAST 30L/S IN ACCORDANCE WITH APPROVED DOCUMENT F, TABLE 5.1A.
INTERNAL DWELLINGS WITH NO THROUGH VENTILATION ARE TO HAVE WHOLE HOUSE VENTILATION SYSTEMS IN ACCORDANCE WITH SPECIALIST MANUFACTURERS DESIGN, SPECIFICATION AND FULLY IN ACCORDANCE WITH THE BUILDING REGULATIONS
ELECTRICAL INSTALLATION
ELECTRICAL INSTALLATION TO BE IN ACCORDANCE WITH APPROVED DOCUMENT PART P WITH LOCATIONS OF SWITCHES, SPURS ETC IN ACCORDANCE WITH APPROVED DOCUMENT PART M. REFER TO ELECTRICAL SERVICES INSTALLATION AND DRAWINGS, WHERE APPLICABLE. .
ALL ELECTRICAL WORK REQUIRED TO MEET THE REQUIREMENTS OF PART P, MUST BE DESIGNED, INSTALLED, INSPECTED AND TESTED BY A PERSON COMPETENT TO DO SO. PRIOR TO COMPLETION THE COUNCIL SHOULD BE SATISFIED THAT PART P HAS BEEN COMPLIED WITH. THIS MAY REQUIRE AN APPROPRIATE BS 7671 ELECTRICAL INSTALLATION CERTIFICATE TO BE ISSUED FOR THE WORK BY A PERSON COMETENT TO DO SO.
RAINWATER GOODS
115MM WIDE PVC-U OR TO MATCH WITH THE EXISTING HALF ROUND DEEP FLOW GUTTERS LAID TO FALLS TO DISCHARGE INTO 63MM DIA. UPVC RAINWATER DOWNPIPES. RAINWATER DRAINAGE DESIGN TO BE IN ACCORDANCE WITH APPROVED DOCUMENT H AND VERIFIED BY THE SUPPLIER.
ALL GUTTERS ADJACENT TO TREES TO BE PROVIDED WITH LEAVES GUARD.
LINTELS
LINTELS SIMILAR AS INDICATED IN ARCHITECTURAL DRAWINGS TO BE CONFIRMED AND DESIGNED BY STRUCTURAL ENGINEERS. GENERALLY IG GALVANIZED PRESSED METAL LINTELS OR SIMILAR WITH INTEGRAL INSULATION AND CAVITY TRAYS OVER, SIZE, TYPE, END BEARING & INSULATION TO MANUFACTURERS RECOMMENDATIONS TO SUPPORT ALL OPENINGS IN ALL INTERNAL & EXTERNAL LOAD BEARING WALLS. PROVIDE CONTINUOUS DPC CAVITY TRAYS BUILT OVER ALL LINTELS IN EXTERNAL CAVITY WALL. CAVITY TRAYS JOINED AND LAPPED MINIMUM 100MM AND SEALED BY APPROPRIATE CONTACT ADHESIVE. ALL LINTELS TO HAVE A MIN END BEARING OF 150MM EACH SIDE. PROVIDE MIN. 2 NO WEEP HOLES PER LINTEL AND AT 450MM CENTRES ABOVE LINTELS.
STRUCTURAL STEELWORK
STRUCTURAL STEEL WORK TO BS 5950.
ALL STEELWORK TO BE PAINTED WITH RED OXIDE PRIMER OR EQUIVALENT
STEELS WITHIN FLOOR CONSTRUCTION AND SUPPORTING ANY STRUCTURE TO ACHIEVE A MIN. 30 MIN. FIRE RESISTANCE BY USING INTESUMENT PAINT OR 2 LAYERS OF FIRE RESISTANT BOARDS.
ALL EXTERNAL STEEL AND METAL WORK TO BE PAINTED GLASS BLACK.
TIMBER TREATMENT
ALL SOFTWOOD TIMBERS TO BE ADEQUATELY TREATED TO PREVENT INFESTATION BY THE HOUSE LONGHORN BEETLE IN ACCORDANCE WITH CURRENT BUILDING REGULATIONS. ALL STRUCTURAL TIMBERS, EXTERNAL FRAMES, WINDOW & SOFTWOOD CLADDING SHALL BE TREATED AGAINST FUNGAL ATTACK. ALL STRUCTURAL TIMBER TO BE MARKED DRY OR KD AND TO HAVE STRESS GRADE MARK.
ALL SANITARY PIPEWORK TO BE IN ACCORDANCE WITH BS 5572 : 1994 AND THE BUILDING REGULATIONS.
SOIL AND WASTE TO BE A SINGLE STACK DRAINAGE SYSTEM TO BS 5572:1978, CONNECTING VIA A SUITABLE ADAPTER TO THE UNDERGROUND DRAINAGE SYSTEM.
DEPTH TO INVERT TO BE MINIMUM 450MM AT CONNECTIONS TO SVP.
INTERNAL VENT PIPES -REDUCE TO 75MM DIAMETER ABOVE TOPMOST CONNECTION AND TERMINATE WITH AN AIR ADMITTANCE VALVE IN ROOF SPACE WHERE POSSIBLE, OTHERWISE FIT AN AIR VENT IN THE BOX-OUT. DRAINAGE SCHEMES TO BE DESIGNED TO MEET THE REQUIREMENTS OF BUILDING REGULATIONS APPROVED DOCUMENT H, IN ACCORDANCE WITH THE INSTITUTE OF PLUMBING ENGINEERS ENGINEERING SERVICES DESIGN GUIDE AND IN ACCORDANCE WITH MANUFACTURERS INSTRUCTIONS AND BBA CERTIFICATION.
ALL WASTES TO HAVE 75MM DEEP SEAL TRAPS. ALL APPLIANCE TRAPS TO BE EITHER REMOVABLE OR FITTED WITH CLEANING EYE FACILITY. SVP -100MM DIA PVCU TERMINATED AT PROPRIETARY ROOF VENT TILE 900MM ABOVE ANY WINDOW OPENING, OR DURGO AIR ADMITTANCE VALVE, WHERE INDICATED.
BRANCH WASTES TO BE SVP CONNECTED EITHER ABOVE CENTRE LINE OR 200MM BELOW CENTRE LINE OF WC SOIL CONNECTION. ROCKER PIPES USED WHERE DRAINS PASS THROUGH EXTERNAL WALLS. UNLESS OTHERWISE INDICATED -BATH, SINK AND SHOWER -40MM DIA. UP TO 3M MAX. LENGTH 50MM DIA. FROM 3M -4M MAX. LENGTH. WASH BASIN, BIDET -32MM DIA. UP TO 1.7M MAX. LENGTH 40MM DIA. FROM 1.7M -3M LENGTH .
100 NOMINAL DIAMETER, SALT GLAZED WARE, SUPERSLEVE OR SIMILAR OR EQUAL APPROVED. TOP RUNS MINIMUM GRADIENT OF 1:40 WITH INSPECTION CHAMBERS AT MAXIMUM 12M INTERVALS. PIPEWORK BELOW BUILDINGS TO BE ENCASED IN 100 THICK GRANULAR OR OTHER FLEXIBLE FILLING IN ACCORDANCE WITH THE MANUFACTURER'S RECOMMENDATIONS. SEE SITE DRAINAGE PLAN FOR DRAINAGE RUNS, GRADIENTS AND MANHOLE INVERTS. DRAINS PASSING THROUGH WALLS TO HAVE 50MM CLEARANCE ALL ROUND WITH LINTEL OVER.
SERVICES
SEAL AT FLOOR AND CEILING LEVELS THE BOXING-IN OF CONCEALED SERVICES. SEAL AROUND ALL PIPED SERVICES WHERE THEY PENETRATE OR PROJECT INTO HOLLOW CONSTRUCTIONS OR VOIDS.
GENERAL
THESE NOTES DO NOT COMPRISE A FULL SPECIFICATION. THEY ARE FOR GENERAL GUIDANCE ONLY AND THEIR PRIMARY FUNCTION IS TO ASSIST LOCAL AUTHORITY OFFICERS IN DETERMINING BUILDING REGULATION APPLICATIONS.
WHERE CLARIFICATION IS CONSIDERED NECESSARY, REFERENCE SHOULD BE MADE TO THE ARCHITECTURAL SERVICES CONSULTANT.
THE BUILDER WILL BE RESPONSIBLE FOR ENSURING THAT ALL BUILDING WORK CARRIED OUT BY THEM OR UNDER THEIR INSTRUCTIONS COMPLIES WITH THE RELEVANT CURRENT REGULATIONS, BRITISH STANDARDS AND CODES OF PRACTICE, BYE-LAWS AND MANUFACTURERS' INSTRUCTIONS.
THE U-VALUES QUOTED ABOVE ASSUME THAT A CALCULATION UNDER THE GOVERNMENT'S STANDARD ASSESSMENT PROCEDURE. BETTER VALUES MAY BE REQUIRED BY THE BUILDING REGULATION AUTHORITY TO IMPROVE THE ENERGY PERFORMANCE.
THE BUILDER WILL BE RESPONSIBLE FOR ENSURING THAT ALL BUILDING WORK CARRIED OUT BY THEM OR UNDER THEIR INSTRUCTIONS COMPLIES WITH THE RELEVANT CURRENT REGULATIONS, BRITISH STANDARDS AND CODES OF PRACTICE, BYE-LAWS AND MANUFACTURERS' INSTRUCTIONS.
THE U-VALUES QUOTED ABOVE ASSUME THAT A CALCULATION UNDER THE GOVERNMENT'S STANDARD ASSESSMENT PROCEDURE. BETTER VALUES MAY BE REQUIRED BY THE BUILDING REGULATION AUTHORITY TO IMPROVE THE ENERGY PERFORMANCE.
Structural Drawing Set Main House
Ground FloorB0.01UKC254x254x7364530.06 m³-127-127
First FloorB1.10UKB254x146x3745000.02 m³4040
First FloorB1.11UKB254x146x4341520.02 m³4040
First FloorB1.12UKB203x133x3065110.02 m³4040
First FloorB1.13UKC254x254x7364510.06 m³4040
First FloorB1.15UKB203x102x2335660.01 m³00
First FloorB1.16UKB203x102x2335660.01 m³00
First FloorB.17UKC203x203x4624390.01 m³00 LoftTie
m³-23-23
Ground FloorB0.01UKC254x254x7364530.06 m³-127-127
First FloorB1.10UKB254x146x3745000.02 m³4040
First FloorB1.11UKB254x146x4341520.02 m³4040
First FloorB1.12UKB203x133x3065110.02 m³4040
First FloorB1.13UKC254x254x7364510.06 m³4040
First FloorB1.15UKB203x102x2335660.01 m³00
First FloorB1.16UKB203x102x2335660.01 m³00
First FloorB.17UKC203x203x4624390.01 m³00
LoftTie beam B2.20 UKC152x152x2326810.01 m³-23-23 Grand total: 9
Mittar Choudhry
Project Engineer
ProjectManager
STRUCTURAL CALCULATIONS
Purpose/Description
Mittar Choudhry
INTRODUCTION
Thefollowing calculation submission report demonstrates the Structural Engineering principals used inthe design of the Project with the Building Regulations 2000 StructureApproved Document A.
Codesof Practice
TheDesignof TheStructurewillbecarried outin accordancewiththefollowingcodesof practice
BS6399 Part 1 (1996) Dead and ImposedLoads Loading
BS8110 Concrete Part 2 (1997) Wind Loads
BS5258
BS5950 Steelwork Timber
BS5628 Masonry
DESIGN PHILOSOPHY
All Structural Members are designed to be capable of withstanding all the applied loadings
connections ductility to dissipate energy arising from unexpected accidental event.
LOADS
Material Densities
To be calculated as required. Densities of Typical materials are as follows:
Loads Superimposed and Imposed Loads
Mittar Choudhry
LOADING BREAK DOWN
FLAT ROOF (DEAD LOAD)
3 Layers Bitumen Roofing Felt
Timber Frame + 19mm Plywood
0.15 kN/m2
0.20 kN/m2
Ceiling Finish 0.17 kN/m2
100mm Thick Hard Insulation
PITCHED ROOF (DEAD LOAD)
Roof Tiles
Total 0.08 kN/m2 0.60 kN/m2
0.40 kN/m2
Timber Rafters + Battens 0.20 kN/m2
Plasterboard Finish + Insulation
TIMBER FLOOR (DEAD LOAD)
Timber Boarding
Timber Joists
Insulation (18mm)
Ceiling (Plasterboard)
Services
Load Combinations
0.20 kN/m2
Total 0.80 kN/m2
0.07 kN/m2 0.14 kN/m2
0.06 kN/m2
0.13 kN/m2
0.10 kN/m2
Total 0.50kN/m2
Loads are combined in all valid combinations of adverse and beneficial effects to obtain the most onerous load condition. The Load combinations used are summarized below.
1.4 DL + 1.6 LL
1.2 DL + 1.2 LL + 1.2 WL
0.90 DL + 1.4 WL
Building Regulation Approval
The Owners of The Property are advised that an approval of the Calculations and Drawings by the Local Authority Building Control should be obtained prior to any ordering of material or fabrication. No liability is accepted for any changes that may be required as a result of work having commenced prior to such an approval having been obtained.
Important Notes For Builder
BEAM SPANS SHOWN WITHIN THIS DOCUMENT ARE TO BE USED FOR CALCULATION PURPOSES ONLY. DO NOT ORDER ANY STEEL OR TIMBER WORKS BASED ON THESE DIMENSIONS.
1. All Spans dimensions shown within this document have been taken from information supplied by the architect or client. We trust this information to be correct, but all spans dimensions should be double-checked on-site by the contractor/fabricator prior to construction or ordering material. Any discrepancies are to be reported to the engineer IMMEDIATELY.
2. These calculations are to be used in conjunction with all relevant Architects and Structural Engineers’ drawings and specifications.
3. The Planning and installation of all temporary works and the stability of the structure during construction is the sole responsibility of the contractor.
4. All Steel Beams supported on Block Walls are to sit on spreader plates or padstones specified. If a padstone is not specified, report back to the Structural Engineer IMMEDIATELY.
Tableof Contents
Section MittarChoudhry Sheet no./rev. 5/00
Calc. by M.Salam Date 17/08/2021 Chk'd by Yasser
PITCHED ROOF SNOWLOADING (BS6399)
SNOW LOADING TO BS6399:PART 3:1988
Site location
Locationofsite; London
Sitealtitude; A= 60m
Calculate sitesnow load
From BS6399:Part 3: 1988 - Figure1. Basicsnow load on theground
Basicsnowload; sb = 0.40kN/m2 salt =0.1 s
Sitesnowload;
17/08/2021 App'd by Yasser Date 17/08/2021
+(0.09kN/m2)=0.13kN/m2
1
UniformloadingAsymmetricloading
1
Roof geometry
Rooftype; Pitched
Distanceonplanfromguttertoridge; b= 4.700m
Angleofpitchofroof; = 36.0deg
Calculate uniform snow load
From BS6399:Part 3: 1988 - Figure3. Snow load shape coefficients for pitched roofs
; Cleat length for torsional requirements: PASS; ; Cleatsfit between beam fillets: PASS
Check 2- Shear capacityof bolt group connecting cleats to web of supported beam (taking account of eccentricity'a') ;;;; Elasticsectionmodulusofboltgroup
; Cleat length for torsional requirements: PASS; ; Cleatsfit between beam fillets: PASS
Check 2- Shear capacityof bolt group connecting cleats to web of supported beam (taking account of eccentricity'a') ;;;; Elasticsectionmodulusofboltgroup
; Cleat length for torsional requirements: PASS; ; Cleatsfit between beam fillets: PASS
Check 2- Shear capacityof bolt group connecting cleats to web of supported beam (taking account of eccentricity'a') ;;;; Elasticsectionmodulusofboltgroup
