Tradesman viewing trade drawings and electrical drawings

Types of trade drawings

by Dave |May 10, 2017 |4 Comments | Uncategorised | , ,

What are the different types of trade drawings completed throughout the stages of construction?

At Drawable we complete a number of different types of trade drawings depending on the stages of construction.

Trade drawings, sometimes referred to as technical drawings, are drawings or plans used by contractors, engineers and tradesmen that documents specific trade elements for construction. An example of a trade drawing is a drawing made for a plumber with unique symbols to show where all the water lines, sinks, faucets, tubs and toilets are to be located.

The type of trade drawing required depends on the stage of construction and the specific development requirements. Not all developments will require all types of trade drawings.

There are 5 main types of trade drawings completed by Drawable throughout the construction process:

  • Tender Drawings:

Tender Drawings are the first type of trade drawing completed during the construction process. They are the engineers vision for the project used for estimating/pricing the cost of the building to be.

These drawings convey a lot of information about the construction to enable the contractors who are quoting for the job to understand the project completely.

The detailed drawings include exact dimensions, specifications and positions of elements.

The contractors will use the Tender Drawings to create the Tender Package. A Tender Package normally consists of the detailed set of drawings as well as a specification document detailing materials, workmanship and required standards for the entire project.

  • For Approval Drawings:

After the tender stage the drawings become For Approval Drawings. The For Approval Drawings are checked by the client and any required amendments are completed.

These drawings are used to affirm that the contractor has correctly interpreted the overall requirements for the development.

The client will then approve and sign off on the drawings, preferably before the construction commences.

  • For Construction Drawings:

Once the For Approval Drawings are signed off they become the Construction Drawings. Construction Drawings are used by the contractors to complete the actual construction.

These drawings, just like the Tender Drawings, will still include all of the detailed and exact specifications which are required by the contractors to get the job done.

  • Revision Drawings:

During the construction process it may be necessary for changes to be completed on site. Revision drawings are completed to document the various changes completed throughout the construction.

A number of revisions may be required depending on how many changes are completed by the contractors.

If there are no changes during the construction process, Revision Drawings will not be required.

  • As Built Drawings:

As Built Drawings are the final set of trade drawing completed for the development project. These drawings are completed after the construction has been completed. They will document the final details of the construction including the exact dimensions, geometry and location of all elements of the work completed.

Depending on the project specifications set out during the tender process, As Built Drawings are not always required.

The As Built Drawings can be used as a record from which future changes and/or additions can be designed. They can also be used as a starting point for any future developments to the same building.

Drafter in blue shirt making revisions on electrical control drawing

AutoCad or Revit?

by Dave |April 10, 2017 |11 Comments | Uncategorised | , ,

If you’re new to drafting and design you’re probably familiar with AutoCAD and Revit by now, or you at least heard of these tools. AutoCAD has been around since the 1980’s and since it’s introduction has eventually become ingrained in the DNA of most design firms and offices and has become an integral part of the day-to-day activities of the design process. It was almost 20 years later that Revit was introduced to the public. It’s acceptance in the design and construction industry was a gradual one but overtime more and more professionals began making the transition or included Revit in their workflow. Not everyone was on board, however. Imagine after years and years of projects all the documentation standards, block libraries and even the comfort of using a tool you’ve used for years, would you be able to put down your favorite application that’s been tried and tested, for a newer shinier tool? This was, and is the dilemma for a lot of professionals when it comes to new technology. This article will give you some insight to the similarities and differences between the two powerful design tools so you can decide where you want to draw your lines; AutoCAD, Revit or both? Let’s begin with what makes them similar.


When it comes to similarities, there are three main topics to discuss; 2D, 3D and Rendering. Both AutoCAD and Revit are used to create 2D drawings such as floor plans, elevations, details, etc. There may be slight differences on how they’re presented graphically but essentially the end result is the same. With both you can generate a set of construction documents. In addition to the common 2D drawings and plans, both can be used to create 3D models and objects, which is extremely helpful in the design process as well as for presentations. Although, the user interface and tools differ slightly, the end result is the same. A tool for 3D modeling. Lastly, you can quickly create rendered images using both types of software. The great thing about this feature for both tools is you don’t necessarily have to be a rendering expert to use the tools. Both AutoCAD and Revit have done a nice job of making it very easy to generate rendered images.


When it comes to the differences between the two, it can be summed up into one acronym, BIM or Building Information Modeling. Long story short, with AutoCAD you’re using lines to create basic geometry that represents real life objects. With Revit you’re using geometry that’s equipped with real life information. In addition to that, with Revit while you’re working in one view like a floor plan, other views are automatically being generated as well, like an elevation for example. The same goes for when you’re making changes. A change in one view will automatically be reflected in other views as well. A good way to look at the benefits of each tool is AutoCAD is great for 2D drawing, where only precise line work is needed, such as elevation detail drawings. Revit is great for modeling, generating cost schedules, collaboration and change management. In the industry of design and construction, competition is fierce. Especially when it comes to getting your first job or to have your bid selected for a project. Mastering both Revit and AutoCAD can give you an edge both in the job market as well as project management in the field. Both applications currently have their place in the design process and construction industry, and putting all your eggs in one basket might not be a wise decision.



Electrical marked up drawing that the trade drafters at Drawable will turn into an as built drawing

As Built drawings

by Cam |February 17, 2017 |5 Comments | Uncategorised |

As-Built drawings, also known as As-Constructed drawings or As-Installed drawings, capture the ‘actual’ build details as completed by various trades on a construction project.

The requirement of projects throughout the building phase for each trade and in most case the client requires these variations to be document. Many modifications are carried out onsite but trades need to formalise the changes, the Construction Drawings document the work to be completed however As Built drawings document the changes throughout the construction process.
The Drawable are able to create As Built Drawings for Electrical and Data, Hydraulic and Mechanical, Security and CCTV, Plumbing, pretty much any trade projects. We work on commercial and residential buildings, retail and shopping centres, defence and government, education and many other types of jobs.

Whether you need modifications to your As Built electrical drawings or hundreds of data points, DB and CB numbers added, wiring schematics updated we can assist. Simply send us the CAD files along with your electrical mark ups and we’ll usually supplies quotes on the same day.

Plumbing contracts will require the submission of as built drawing for both hydraulic and civil services. We update the CAD for all your sewer, water, gas, tanks, DP’s, pits, pumps, sinks, troughs and more. Simply send us the CAD files (we’ll have a look and make sure we can work with them) along with your mark-ups and we update the CAD files and send them back as PDF’s for checking.

Penetration drawings (sometime referred to as peno drawings) save time, money and prevent costly onsite mistakes. All vertical penetration points are specified in a CAD drawing and in turn used by the surveyor to plot out the data onsite. To provide you with a penetration drawing, specify the point for all your basins, toilets, baths, troughs, washing machines, kitchen sinks, down pipes, floor wastes, planter boxes etc., along with the hydraulic drawings and we’ll simply locate your points in CAD and provide an easy checking drawing.

if it’s moving condenser units, updating numbering and system identifications, shifting tundish locations or revising duct work just mark it up and we’ll implement the changes in CAD to reflect a true as constructed drawing.

We are able to strip out electrical drawings and modify them to be purely security drawings. We logically locate all your door, camera and intercom components plus specific features such as push button, card reader, electric strike, magnetic strike etc. Most clients have their own preferred legend or we will happily develop one for you as standard.


As Constructed Drawings

We update your marked up contractor drawings to ‘As-Constructed’ conditions, up issue revision numbers and history tables. Outputs include PDF & DWG files, plots and CD copies.


We customise the As Constructed drawing title block to incorporate your company logo and contact details. From now on every drawing you submit will not just be meeting a job requirement, but a marketing tool which may see you contacted for future works.

Long Term Benefits

As Built drawings saves everyone money it’s that simple.

Being able to show tradespeople the exact location of where work is to be completed or where the faulty component is, or the data outlet that needs to be patched in, the plantroom that requires servicing etc.  Since As-Built drawings define the location of hidden services such as wiring, ducts and plumbing, future remodelling, repairs and maintenance can all be carried out with greater ease.

Similarly, building permits and dispensation applications to council require as-built drawings. Supplying current hard and soft copies of these reduces the time and associated cost for the applicant.

Belle property logo

Belle Properties HQ

by Cam |December 16, 2016 |1 Comments | Uncategorised | ,

One of the last job that we’ll knock over before Christmas are the drawings for Belle Properties in Head Office.

We’ve been pushed hard to finish these As Builts before the break.

Units, units & more units!!

by Cam |December 16, 2016 |3 Comments | Uncategorised |

With no sign of the apartment boom letting up in Sydney we are currently completing the electrical design drawings for over 2,000 units in NSW.

We are working very closely with the Pro Electrical and Goldline teams to deliver high end designs to the builders before construction begins.

Crazy Rooms in Astral Towers

by Cam |December 16, 2016 |1 Comments | Uncategorised | ,

Hot off the press, we have just finished the As Builts for the new themed rooms in the Astral Towers at Star City.

Orange renewable energy switchboard installed after trade drafting drawings completed

1,200 Switchboard Drawings

by Cam |December 16, 2016 |3 Comments | Uncategorised | ,

After 18 months we are coming to the end of drawings EVERY single switchboard located in the Eveleigh Campus for the University Of Sydney.

The work has been completed for Stowe Australia and the next phase will involve us documenting the boards at other sites.


How can we help you?

Call us on: (02) 9519 0000