Telecoms infrastructure moves fast, and the drawings have to keep up. Every mast upgrade, rooftop installation and street works cabinet needs a design pack that satisfies the operator, the planning authority and the build contractor — often on a turnaround measured in days, not weeks. This guide explains what telecoms CAD drafting actually involves in the UK, where ICNIRP compliance fits in, and how outsourced drafting support keeps rollout programmes on schedule.
What Does Telecoms CAD Drafting Cover?
A typical UK telecoms site design pack includes far more than a single drawing. Depending on the site type — greenfield mast, rooftop, streetworks pole or in-building solution — the pack usually contains:
- Site location and access plans showing the compound, access routes and land boundaries
- General arrangement (GA) drawings of the proposed installation in plan and elevation
- Antenna and equipment schedules detailing heights, azimuths and mechanical tilts
- Elevation drawings showing existing and proposed configurations side by side for upgrades
- Cable routing and containment layouts from equipment cabinets to the headframe
- Detail drawings for brackets, steelwork interfaces and grillages
For upgrade work — which makes up the bulk of current 4G and 5G programmes — the drafting task is usually about accurately capturing the existing site from surveys and photographs, then overlaying the proposed changes clearly enough that a rigging team can build from the drawing without ambiguity.
Where ICNIRP Compliance Fits In
UK mobile operators are required to ensure their installations comply with the ICNIRP guidelines on public exposure to electromagnetic fields, and Ofcom licence conditions require operators to demonstrate EMF compliance for their transmitting sites. In practice, this flows down to the design pack in two ways.
First, planning submissions for new and upgraded installations are normally accompanied by an ICNIRP compliance declaration. Second, the drawings themselves often need to show exclusion zone information — the areas around antennas where general public access must be restricted — presented clearly on elevations and roof layouts so that site providers, landlords and maintenance contractors can see them at a glance.
Drafting these correctly requires familiarity with how each operator presents exclusion zones and compliance information on their templates. It is detail work, and it is exactly the kind of detail that gets missed when drawings are produced by generalist drafters unfamiliar with UK telecoms conventions.
Structural Assessments and the Drawings Behind Them
Every time equipment is added to a mast, rooftop or tower, someone has to confirm the structure can carry it. Structural assessments for telecoms sites rely on accurate record drawings of the existing structure and clear proposed-configuration drawings showing the new loading — antenna counts, positions, mounting steelwork and feeder runs.
The drafting side of this work includes producing existing and proposed elevations from survey data, steelwork detail drawings for strengthening schemes, and marked-up record drawings once works are complete. Clean, dimensionally accurate CAD input directly affects how quickly the structural engineer can complete the assessment — poor drawings mean queries, and queries mean programme delay.
As-Builts and Redline Markups for Telecoms Sites
Telecoms rollout generates enormous volumes of redline markups. Riggers and build teams mark changes on the construction issue drawings — a relocated cabinet, a revised cable route, an antenna swapped at the last minute — and those markups need converting into formal as-built drawings for the operator's records.
This is high-volume, deadline-driven work that suits an outsourced model well: the site knowledge is already captured in the redline markup, so no site visit is needed, and an experienced drafting team can turn packs around consistently at whatever volume the rollout programme generates.
Why UK-Based Drafting Support Matters for Telecoms
Telecoms drawing work is unforgiving of miscommunication. Operator templates, naming conventions, title block requirements and drawing numbering systems all differ, and build programmes rarely allow a 24-hour round trip for every query. A UK-based drafting team working in the same time zone can raise a query in the morning and issue the corrected drawing the same afternoon — which, across a programme of hundreds of sites, is the difference between drawings being the bottleneck and drawings being invisible.
There is also the standards dimension: familiarity with UK planning submission requirements, ICNIRP declaration conventions and operator-specific documentation means less rework and fewer rejected packs.
How Outsource CAD Supports Telecoms Projects
Outsource CAD's telecoms design service covers site design drawings, ICNIRP exclusion zone presentation, structural assessment drawing packs, and as-built production from redline markups — delivered by a UK-based team with a background in multi-operator telecoms design. Whether you need overflow capacity during a rollout peak or a standing drawing production arrangement, the work is produced to your operator's templates and standards from day one.
To discuss a telecoms drawing package or set up a trial pack, visit our telecoms sector page or get in touch through the site — send us a sample pack and we will show you how we would handle it.
