Cad Design Works

Cad Design Works

CAD DESIGN WORKS

2 Carpe Road, Leicester. LE4 9BS

Tel: 0116 2168258, Mob: 07887835242

Create and design to Perfection

CAD STANDARD

Maintaining a high standard in your drawings doesn’t just improve accuracy and reduce on-site issues, it also says a great deal about your company to those parties you share your documents with.

We are committed to not only maintaining the highest standards of work but continuously improving those standards by making use of the latest technologies backed by ongoing staff training.

CAD DESIGN WORKS has extensive experience of converting a wide range of mark up and source files, of variable quality and style, to produce a consistent end product – time and time again.

Optimised CAD performance through extensive customisation of standard templates, menus, blocks and libraries.

Quality-controlled workflow processes with continuous improvement

Constant checking for accuracy and quality

Reduced wastage

Increased drawing output

Our reputation has been built on helping clients to maintain and enhance their reputation.

CONSISTENT STYLE – CONSISTENT ACCURACY - CONSISTENT QUALITY

Our CDW CAD Standard Philosophy?

At CDW(Cad Design Works) we invest a huge amount of our time each week in producing information on CAD, therefore it is imperative an effective set of CAD Standards is employed to maintain the quality, efficiency and consistency of drawn data.

CDW are a design driven company and we are employed as lead design and drafting service provider, so must not only set the benchmark for the standard across each project but produce high quality well laid out drawings that are perfectly legible and devoid of ambiguity and error. File sizes should be kept to a minimum for maximum efficiency and fast uploads. All CDW drawings are drawn in the same style and to the same standards, which ensures consistency across all projects.

Good Reasons for Adhering to the Standards

As a lead service provider we issue a CAD Standards document to all Clients and Consultants outlining the standards we have and expect their drawings to meet. Hence the information produced by CDW meet these common acceptable standards.

All drawings should look like the same company has produced them.

When all projects are set up identically so it is far easier for staff to work across different projects.

Routines can be developed that can perform repetitive amendments on drawings automatically.

It allows for effective data exchange with Consultants.

Users will know exactly where to find the required information without having to learn a unique system on each project.

Drawing data can be reused with other CDW projects.

Reduced margin for error.

CDW CAD Standard

1. Layers

All files should contain layers that confirm to the BS1192 layer convention that utilises the CISFB/Classification System. All layers should be named in the following manner. The naming for these files contains a minimum of three fields of information,

Field1 (Discipline)

This indicates which discipline the layer belongs to.

Field2 (Code)

Shows the CDW reference code to indicate the description of element.

1 -Field / 2- Code
A / Architectural / 100
M / Mechanical / 200
E / Electrical / 300
SE / Structural Engineering / 400
I / Interior Design / 500
SH / Shop Fitting / 600
ST / Steel fabrication / 700

Field3 (Type of drawing entity)

The third field contains the type of entity created within the AutoCAD drawing:

d / dimension
h / Hatch
g / Graphics ( Lines, arc, circles etc)
s / Solids
t / text

Therefore a layer with the name A220g would be defined as

Field1 (Discipline) Field2 (CISFB Code) Field3 (Type of Drawing entity)

A 220 g

This example shows a layer that has been created by Architects for an internal partition to display line entities. There are also instances where additional fields may need to be used.

Firstly it may now be necessary to distinguish between text, dimensions and certain other buildings elements drawn at different scales. This is to be done by introducing an additional field at the end of the layer name to indicate the scale being represented, for example 020 would be placed as a suffix to the layer name to indicate information to be displayed at 1:20 only and 100 would be added as a suffix to indicate information to be displayed at 1:100 only as shown below.

A220G020 indicates a partition layer to be displayed at 1:20 only

A220g100 indicates a partition layer to be displayed at 1:100 only

Secondly for certain projects there may be a requirement to define the status of building elements. This is to be done by using a letter as a suffix to the layer name i.e. X = existing, N = new, R = removals / demolitions as shown below.

A220GX indicates partitions that are existing

A220GR indicates partitions that are to be removed / demolished

Use these fields only and do not add descriptions into the actual layer names.

Please see last page, for full CDW layer list.

If additional layer names need to be added into a drawing that are not available from the menu they must conform to the CDW standard as stated above. A suitable description should also be added into the Description column for the layer within the Layer Properties Manager. Should there be a further requirement to use the layer, please discuss this with the CDW Cad Manager.

The Autocad Visretain variable is to be set to 1, which will hold all xref layers settings. Manipulating layers through viewports should be avoided as it can cause inconsistencies in the layer settings.

Generally all colours and linetypes are to be set to a bylayer. These may only be overridden in certain justifiable instances.

2. Drawing Insertion Point

The lowest bottom left intersection of a building grid should always be set at 0,0. In the absence of a building grid line, the most bottom left corner of the building should be put at 0,0.

This ensures that buildings and their relevant services line through when/if inserted into one another.

3. Linetypes, Ltscales and Lineweights

All linetypes should be loaded into drawings from the Acad.lin file and not Acadiso.lin. Also when loading lines into a drawing from Acad.lin, never use linetypes with a prefix of Acad_iso. These lines are scaled differently and are out of sync with all other dashed linetypes.

Setting the Ltscales manually is as follows.

Setting Ltscales and Psltscale Manually

For MSpace drawings:

Ltscale to be set to ten times the scale of the drawing, e.g. a drawing that is eventally to be plaotted at 1:100, would have an Ltscale of 1000.

PSltscale should be set to 0 (turned off).

PSpace drawings with one view port scale:

Ltscale to be set to ten times the scale of the drawing, e.g. a drawing that is eventually to be plotted at 1:100, would have an Ltscale of 1000.

PSltscale should be set to 0 (turned off).

PScale drawings with multiple view port scales and /or dashed lines in ‘PSpace’:

Ltscale to be set to 10.

PSltscale should be set to 1 ( turned on).

There are several variables and factors within AutoCAD that can affect the appearance of dashed lines. These should be set as follows to ensure all linetypes across projects look the same.

Celtscale: Should be set to 1. This sets the line type scaling for new individual lines as a multiple to the Ltscale setting. For example if a dashed line was drawn with the Celtscale variable set to 5 and the Ltscale set to 1000, that individual entity would have an overall linetype scale of 5 and the multiplied by 1000 which is 5000. Obviously, it is extremely bad practice for individual line type scales to be overridden as this throws out all common scaling not only in the current drawing, but other files, should parts of drawings be inserted into others. The Properties command also allows you to do this. Do not use it. This must always be kept to the value 1. If closer or longer dashed line types are required always use 0.5 or x2 linetypes in Acad.lin file.

Acad.lin: All linetypes should be loaded into drawings from the Acad.lin file and not Acadiso.lin. Also, when loading lines into a drawing from Acad.lin, never use linetypes with a prefix of Acad_iso. These lines are scaled differently and are out of sync with all other dashed linetypes.

Measurement: Sholud be set to 0. This controls whether linetypes load up from the correct file (should be Acad,lin).

Visretain: This variable controls not only the visibility of xref layers but also holds their colours and linetype settings from the moment the variable was turned on. For example, If a site plan model containing a boundary line shown as continuous was xrefed into a drawing with Visretain set to 1, the boundary line will show continuous. If then it is decided to change the boundary line to a dashed linetype, the line must first be charged in the site plan model. The target drawing file will not show the change in linetype until Visretain is turned off in that file and the xref re-loaded.

At no time should an individual lines ltscale be overridden. Any adjustment of spacing between breaks in lines should be done using the half, and double sized linetypes ( i.e. 5 and x2).

All drawings are to have one drawing unit to equal 1mm.

a. Text

Only the office standard text style is to be used in drawings, this is called CDW and uses the Romans.shx font file with a width of 0.8. The text for the scale being worked at should be selected and all relevant styles, heights and layers etc. will be set automatically.

Room names and numbers are also to be inserted from CDW Tools >Room Names and Nos. using either the single or double line option.

Generally all text within a drawing should now be layered specifically to the output scale and not package it is referring to.

When inserting external data all text is to be converted to these standards.

Do not use any other text in drawings other than that provided on the CDW Tools menu. This will ensure all CDW drawings look consistent and plot correctly.

b. Dimensioning and Leader Arrows

Only the office standard dimension styles are to be used. These styles are:

Dim1, Dim2, Dim5, Dim10, Dim20, Dim50, Dim100, Dim200.

All of these styles reflect the final plotted output scale and all dimensions are drawn with the office standard text style. Once the required dimension / leader style has been selected all relevant styles and layers will be automatically inserted into the drawing. Please be aware all leader arrows will default to the text layer when inserted from the pull down menu.

Under no circumstances should dimension text be overridden. If dimensions are required to the nearest 5 or 10mm for example highlight the dimension with grips, open the Properties box, selected Primary Units and adjust the Dim Roundoff box. Also dimension nodes should be placed exactly on the building element being dimensioned to ensure the display of accurate information.

4 CTB Files

General all drawing work is to be done using palette colours 1 to 9 Number 150 is to be used for base build information only. All of these colours will plot in black.

Colours 10 to 255 inclusive, with the exception of 150, are to be used for colour only. The new .ctb files CDW-Full and CDW-Reduction support these pen assignments. The colour palette for CDW-Full.ctb is shown below.

1 Red / 0.010
2 Yellow / 0.150
3 Green / 0.200
4 Cyan / 0.300
5 Blue / 0.600
6 Magenta / 0.500
7 White / 0.380
8 Grey / 0.010
9 Grey / 0.010
250 Greyscale / 0.150
251 Greyscale / 0.150
252 Greyscale / 0.150
253 Greyscale / 0.150
254 Greyscale / 0.150
255 Greyscale / 0.150
150 / 0.150

Code for description of element

000 / Text and Dimensions ( relative scale given as suffix )
010 / Drawing Sheet / Teitle Block
020 / Construction lines
030 / Building Grid
034 / Planning Grid
040
050
060 / Annotation symbols
061 / Fire rating to wall
070
080
090 / Levels
100 / GROUND, SUBSTRUCTURE - GENERAL
110 / Groundwork - General
111 / Ground relief – embankments, cuttings, slopes
113 / Ground composition – stabilised ground
114 / Groundwater
115 / Underground – underpinning tunnels, culverts, land drainage
119 / Parts, accessories – excavations, trenches, cut and fill
130 / Floor Beds - General
131 / Floors on the ground
132 / Suspended floors
134 / Beds for plants
136 / Ground underwater - pools
139 / Parts, accessories – damp proofing, reinforcement, insulation
160 / Foundations - General
162 / Retaining walls, diaphragm walls
163 / Water retaining walls - caissons
164 / Foundations – pad, foot, strip
169 / Parts, accessories – damp proofing, reinforcement insulation
170 / Pile Foundations - General
171 / Sheet piling
172 / In-situ formed foundations – bored, cased, uncased
173 / Pre-formed foundations – driven, jacked, screwed.
179 / Parts, accessories - reinforcement
200 / STRUCTURAL, PRIMARY ELEMENTS, CARCASS - GENERAL
210 / External Walls
211 / Complete walls – cavity and inner walls
212 / Outer leaf of cavity walls
213 / Inner leaf of cavity walls
214 / Curtain walls
216 / External framing and cladding
218 / Other walls – parapet, gable
219 / Parts, accessories – reinforcement, ties, insulation, damp proofing
220 / Internal general partition ( flr, to u/s ceil. )
221 / Internal half or part height partitions
222 / Internal slab to slab partition
223 / Internal raised floor to u/s slab partition
224 / Internal slab to u/s ceiling partition
225 / Internal masonry wall
226 / Internal framing or cladding
227 / Internal demountable partition
228 / Other walls – party walls
229 / Parts, accessories – reinforcement, ties, insulation
230 / Floors – General
232 / Slab floors, monolithic floors
234 / Composite, assembled floors
235 / Floor bunding
237 / Balconies, Galleries
238 / Other floors – metal decks, metal plates
240 / Stairs – general
241 / Ramps
242 / Straight
243 / Dog Leg
244 / Curved and spiral
245 / Escape stairs, open well stairs
246 / Ladders
270 / Roofs – General
271 / Fiat roofs, terraces
272 / Pitched roofs
274 / Folded plate roofs
275 / Other roofs – domes, steeples, spires
276 / Space frame roofs
277 / Canopies
278 / Rectractable roofs
279 / Parts, accessories – decking, trusses insulation
280 / Building Frames – General
281 / Metal columns
282 / Concrete columns
283 / Metal beams
284 / Concrete beams
285 / Timber frames
286 / Space frames as building frames
287 / Other frames – shafts, ducts, chimneys
289 / Parts, accessories, connections
300 / SECONDARY ELEMENTS, COMPILATION OF STRUCTURE - GENERAL
310 / External Wall Completions - General
311 / Patio sliding doors
312 / Shop-fronts, entrances
313 / Composite window/door openings
314 / External windows
315 / External doors
316 / Revolving doors
317 / External hatches, meter box doors
318 / Other wall completions – louvred barred
319 / Parts, accessories – lintels, sills, ironmongery
320 / Internal Wall Completions – General
323 / Composite windows/door openings
324 / Internal windows
325 / Internal doors
327 / Internal hatches, services
329 / Parts, accessories – internal lintels, arches
330 / Floor Completions, Secondary Elements – General
331 / Access floors, cavity floors
334 / Floor barrier
335 / Floor doors/openings, trapdoors.
340 / Stair Balustrades, handrails – General
350 / Ceilings – General
351 / Suspended ceilings, tiles, panelled
352 / Suspended ceilings, louvred
354 / Ceiling barrier
359 / Parks, accessories – insulation, access hatches.
370 / Roof Completions
371 / Rooflights
373 / Composite window/door openings to roofs
374 / Roof windows
376 / Roof balustrades, parapets
378 / Roof walkways
400 / FINISHES TO THE STRUCTURE - GENERAL- GENERAL
401 / External Wall Finishes – General
410 / Wall finishes
411 / Sandwich cladding with external/internal lining
412 / Wall cladding panels
413 / Weather-boarding shiplap cladding
414 / Wall cladding panels
415 / Coatings to external walls, render
419 / Parts, accessories – external insulation
420 / Internal Wall Finishes – general
421 / Drylining
422 / Palstered internal walls
423 / Timber finishes
424 / Internal wall tiles
425 / Coatings to internal walls – paint
426 / Wallcoverings – paper, vinyl
429 / Parts, accessories – insulation, trim
430 / Floor Finishes – General
431 / Jointless floor finishes – cement, resin
432 / Rigid tile and slab flooring – ceramic, stone
433 / Flexible tiles and sheet flooring – plastics
434 / Strip flooring – timber
435 / Carpets, carpet tiles
436 / Floor screeds
439 / Parts, accessories – adhesives, skirtings, trim
440 / Stairs Finishes – General
441 / Stair treads, nosings
442 / Stair trim, skirtings
450 / Ceiling Finishes - General
450 / Ceiling boards, panels, applied direct to surface
452 / Ceilings coatings, plaster
459 / Parts, accessories – cornices, architraves, coves
460 / Blinds
470 / Roof Finishes
471 / Roofing membranes
472 / Mastic asphalt roofing
473 / Roof tiles, slates
474 / Sheet roof cladding
475 / Roof screeds
479 / Parts, accessories – trims, vents, sealants
500 / SERVICES – GENERAL
520 / Waste Disposal, Drainage – General
521 / Refuse disposal
522 / Gaseous wastes
523 / Foul drainage
524 / Chemeical, petrol waste
525 / Rianwater, surface water drainage
526 / Internal ( above ground) drainage
527 / Below ground drainage
528 / Drainage casrings – covers, frames, gullies
529 / Parts, accessories, traps, vents, manholes
530 / Water and Liquid Supply - General
531 / Cold water supply
533 / Hot water supply
534 / Hot water from individual appliances
535 / Special water supply – softened, de-ionised.
537 / Petrol, Oil supply
539 / Parts, accessories – cisterns, taps, valves, lagging
540 / Gas Supply – General
541 / Fuel gas supply
542 / Steam supply
543 / Compressed air supply
545 / Vacuum supply
549 / Parts, accessories
550 / Space Cooling, Refrigeration – General
560 / Space Heating – General
561 / By energy source – oil, gas, electricity, solid solar
562 / District, communal heating
563 / Central heating
568 / Heating from local appliance
569 / Parts, accessories – lagging storage distribution
570 / Ventilation – General
571 / Central air conditioning
573 / Air conditioning by local appliances
576 / Mechanical ventilation, central ventilation
577 / Ventilation by local appliances – extract fans
590 / Parts, accessories to Piped, Ducted services – Flues, Flue Linings, Boilers – General
600 / SERVICES, MAINLY ELECTRICAL - GENERAL
610 / Electrical Supply – General
611 / Mains intake to local control gear
616 / Public mains electrical supply
617 / Emergency, standby supply
619 / Parts, accessories – distribution boards, switchgear, meters
620 / Power Supply – General
621 / Trunking conduit
622 / Wiring cable, wiring systems
623 / Electrical accessories – sockets, plugs, meters.
629 / Parts, accessories – controls, outlets
630 / Lighting – General
631 / General lighting systems
632 / Local lighting, spotlights, displsy lights
636 / Floodlighting
638 / Emergency lighting
639 / Parts, accessories – lamps
640 / Communications - General
641 / Audio Visuals – TV
642 / Audio-radio, telephone, intercom
644 / Signal communications – telex, fax
645 / Clocks
649 / Parts, accessories, loudspeakers, exchanges
650 / Telecommunications
660 / Transport – General
661 / Lifts
663 / Cleaning cradles
664 / Escalators
665 / Coveyors
666 / Moving pavements
667 / Cranes, hoists
668 / Mechanical – pallets
669 / Parts, accessories – pulleys, motors, controls
670 / Fire equipments / Signage / Building Control
680 / Security protection - General
681 / Combined security / fire protection
682 / Security services, burglar protection
683 / Fire protection
684 / Sprinkler systems
685 / Hose reels, cabinets
686 / Lightning protection, bird/vermin nuisance
687 / Control, monitoring or building services
688 / Sound control
689 / Parts, accessories – buzzers, bells, alarms
700 / FITTING AND FURNITURE – GENERAL
710 / Circulation fittings - General
711 / Signs, lettering notice boards
712 / Display fittings, plant displays
713 / Entrance mats, frames
720 / Rest, Work Fittings – General
721 / Bedroom fittings – beds, wardrobes
722 / Rest fittings – easy chairs, settees
723 / Work fittings – work stations, desks, benches
725 / Work fittings – tables, chairs
730 / Kitchen, Culinary fittings – General
731 / Kitchen units, worktop
732 / Kitchen sinks, disposable units, draining boards.
734 / Cooking appliances – cookers, fryers, grills, ovens
735 / Culinary storage appliances – fridges, freezers
736 / Bar fittings
738 / Vending machines, drinking fountain, water coolers
740 / Sanitary Fittings – General
741 / Sanitary suites
742 / Washing fittings – baths, bidets, showers, basins
743 / Drying fittings – towels rails, driers
744 / Water closets, urinals
745 / Incinerators, macerators
747 / Sanitary supply, soap dispensers, sanitary towel dispensers
748 / Other sanitary fittings – mirrors
750 / Cleaning Fittings – General
751 / Washing machines
753 / Drying machines
758 / Dry cleaning machines
760 / Storage fittings – general
761 / Composite storage fittings – storage walls
762 / Cupboards
763 / Drawers
764 / Shelving, racking
765 / Suspended storage
766 / Other storage – safes, lockers
767 / Screening – screens, blinds, curtain, tracks
770 / Special Activity Fittings – General Built-in or otherwise – sports, hospitals.
780 / Loose Fittings – General
783 / Soft furnishings, upholstery
786 / Works of art, sculpture
800 / Internal Department
801 / Gross area
802 / Gross internal area
803 / Net internal area
804 / Net usable area
805 / Non usable area
806 / Core
807 / Building Analysis – Prime
808 / Building Analysis – Secondary
809 / Building Analysis – Tertiary
820 / Offices
821 / Workstations
822 / Traders Desks
823 / Amenities
824 / Catering
825 / Special/industry Specific
826 / Floor Support
827 / General Support
828 / Files/Storage and Store Areas
829 / Circulation – Primary
830 / Circulation - Secondary
831 / Circulation – Lift lobby/Common flr.
900 / EXTERNAL WORKS - GENERAL
901 / North point, scales, title blocks
902 / Match lines
903 / Notes
904 / Hatch patterns
907 / Section drawings
910 / SITE INFORMATION
911 / Boundary lines, survey benchmarks
912 / Bearing and distance labels
913 / Easements, rights of way, setbacks
917 / Existing buildings
918 / Proposed buildings
920 / Survey Information
921 / Existing contours
922 / Proposed contours
923 / Spot elevations
924 / Retaining walls
925 / Cut and fill
926 / Daylight and sunlines
927 / Notes and calculations
930 / Land Drainage
931 / Sprinklers
932 / Layout, coverage
933 / Secondary pipes
934 / Mainlines pipes
935 / Pipe sizes
936 / Valves, meter
937 / Other equipment
939 / Schedules
940 / Landscaping
941 / Existing trees
942 / Proposed trees
943 / Trees to be removed
944 / Shrubs
945 / Ground cover
946 / Grass and lawns
947 / Boulders
948 / Rock, bark and other landscaping beds
949 / Schedules
950 / ROADS, PAVING, CAR PARKING GENERAL
951 / Road centre lines
952 / Kerbs
953 / Parking bays
954 / Traffic islands, roundabouts
955 / Disabled ramps, signs, features
956 / Paths
957 / Pavements
958 / Roads
959 / Schedules
960 / Services and utilities
961 / Water
962 / Sewer systems
963 / Storm sewers
964 / Gas
965 / Electricity
966 / Lighting
967 / Communications, telecom, cabling
968 / Fire services
969 / Schedules
970 / HARDSCAPE
971 / Fencing
972 / Walls
973 / Gates, barriers, bollards
974 / Benches, seats
975 / Decks and bridges
976 / Street furniture, waste bins
977 / Playground equipment
978 / Lighting
979 / Schedules
980 / SPECIAL LANDSCAPING
981 / Swimming pools, spas
982 / Sport facilities
983 / Ponds
984 / Lakes
985 / Wetlands, special areas
986 / Sheds, summer houses
989 / Schedules
990 / ENVIRONMENTAL
991 / Slope
992 / Aspect
993 / Soils and geology
994 / Land use
995 / Vegetation and ground cover
996 / Wildlife
997 / Prospect, views
998 / Air and sound quality
999 / Climate wind shadows

CDW – CAD Standard