Why paper drawings are a hindrance on site
Large paper drawing rolls are bulky, prone to damage from weather and quickly become outdated when revisions are issued. On a busy construction site they often sit in a dry store while staff walk back to the office to confirm a detail, causing delays and increasing the risk of mis‑communication.
A digital copy on a phone eliminates the need for physical handling and ensures the most recent version is always at hand. The ability to zoom, pan and search within the file also speeds up the process of locating the relevant detail, especially on complex multi‑discipline projects.
Who benefits from mobile access
Site engineers and setting‑out technicians gain immediate visibility of structural, mechanical and civil layouts, allowing them to verify chainages, levels and dimensions without returning to a desk. This reduces the likelihood of working from superseded information and shortens the query‑resolution cycle.
Project managers, health and safety officers and client representatives also profit during site walks. They can annotate progress, flag non‑conformities and record variations directly on the drawing, creating a visual record that can be shared with the design team without waiting for a written report.
Where JobEng helps
Open and mark up AutoCAD drawings on your phone. JobEng is an app for UK engineering and construction, on iPhone and Android with the same account on the web. Firms use it to hire engineers and run the business side of their projects.
Preparing your phone and files before you go
Before relying on a mobile device, confirm that it has enough free storage for the required drawing sets and that the operating system is up to date. Install a reliable CAD viewer while you still have a stable internet connection, as downloading large files on site can be slow or impossible.
Organise the files in a logical folder hierarchy that mirrors the project index and download the specific drawings you will need for the day. Storing them locally ensures you can work offline if the site has poor signal, and it prevents accidental overwriting of the master files on the server.
- Download drawings for offline use ahead of time
- Keep a clear folder structure matching the project index
- Charge the phone fully and carry a power bank
- Set screen brightness high and extend timeout for outdoor work
Marking up drawings effectively on a small screen
Use a limited colour palette to make notes instantly recognisable: red for critical changes, blue for information requests and green for completed items. Stick to the text tool for written comments rather than freehand sketches, as typed notes remain legible when the file is viewed on a larger screen later.
When adding a comment, reference exact grid lines, chainages or level marks to avoid ambiguity. If the viewer supports it, attach a photo taken on site directly to the markup location; this provides context and reduces the need for separate photographic records.
Always verify the drawing’s units and scale before taking any measurements on the phone. Calibrate the built‑in measuring tool against a known dimension such as a standard bay width or a printed scale bar; this step ensures that on‑screen distances correspond to real‑world values.
Common mistakes and how to avoid them
A frequent error is assuming the phone automatically interprets the drawing’s scale. If the viewer defaults to a different unit, measurements will be off and could lead to incorrect setting‑out. Always double‑check the unit setting and, where possible, run a quick test measurement against a known feature.
Another pitfall is relying on a single device for the whole team. If only one phone holds the latest drawing, others may work from outdated copies. Distribute the files to all relevant devices at the start of the day and agree on a regular sync point, such as after each shift change, to keep everyone aligned.
How to start
- Download JobEng free from the App Store (iPhone) or Google Play (Android).
- Create a business account for your firm — firms can ask about a free month of the full platform.
- Open JobEng and start with: open and mark up AutoCAD drawings on your phone.
Download JobEng free
The whole platform for your firm, on your phone. On iPhone and Android, with the same account on the web.
Frequently asked questions
Can I view DWG files on any smartphone?
Most modern smartphones can open DWG files when a compatible viewer is installed; the file format itself is not limited to a particular operating system.
Do I need an internet connection to annotate drawings?
Annotations can be added offline if the drawing is stored locally; you only need connectivity to sync the changes back to the central repository later.
How can I ensure measurements taken on the phone are accurate?
Check the drawing’s unit settings, calibrate the measuring tool against a known dimension and verify the scale bar before relying on on‑screen measurements.
JobEng is free to download on iPhone and Android. Firms can ask about a free month of the full platform.
Questions about the product or your data? See support and the privacy policy.