Brief & feasibility
We read the spec and the certification route, then say plainly what is buildable — before anything gets modelled.
Deliverable: Feasibility note
Technical Design · Engineered Precision
Built to
Built to
resist.
Drawn to fit.
Digital Blitz is a UK drawing office for security doorsets, blast-resistant assemblies and architectural metalwork. We take a performance spec and hand back fabrication drawings the shop floor can cut from.
LPS 1175
SR2–SR5
PAS 24
STS 202
ISO 16933
EXV
FD30–FD120
BS EN 1634
01
What we take on
Six things we do every week — most jobs need three or four of them together.
01
CAD Drafting
Production 2D and 3D work in AutoCAD and SolidWorks, from marked-up survey sketches to a full coordinated sheet set.
02Technical Detailing
Junctions, fixings, thresholds and interfaces resolved at 1:5 and 1:2, so nobody on site has to improvise.
03Security Door Design
Doorsets designed around the certification route from day one, with the test evidence trail kept intact.
04Fire Door Consultancy
FD30 to FD120 assemblies checked against field-of-application, with ironmongery schedules that actually comply.
05BIM & PDM Support
Revit families and SolidWorks PDM vaults configured properly — naming, revisions and permissions that survive a busy job.
06Construction Documentation
Drawing registers, mark-ups, transmittals and revision control, run through to handover.
02
Inside a leaf
A rated doorset is a stack of decisions. We draw every one of them.
01
Skin & profile
Gauge, folds and weld prep drawn so the press brake and the jig agree.
02
Core
Mineral wool or composite, specified against the fire and acoustic targets together.
03
Reinforcement
Stiffener pitch and anchor layout set by the blast rating, not by habit.
04
Thermal break
Detailed to hold the U-value without breaking the security line.
05
Seals
Intumescent, smoke and acoustic seals positioned to the tested assembly.
06
Ironmongery
Cut-outs, reinforcement plates and schedules that keep the certification valid.
Thermally broken security doorsets
External doorsets holding an SR rating and a 1.4 W/m²K U-value on the same profile, drawn through to fabrication.
See package types →Blast-resistant door systems
Anchor layouts, leaf build-ups and frame reinforcement drawn to suit the rating and the surrounding structure.
See package types →Fire doorset documentation
Frame junctions, seal positions and ironmongery cut-outs documented against the assembly's own test evidence.
See package types →
04
Track record
A decade of production drafting, mostly for manufacturers and specialist installers.
10+
Years in the drawing office
2,000+
Drawings issued
100+
Projects supported
6
Core software platforms
05
How we run a job
Four stages, each ending in something you can actually use.
Concept & GA
General arrangements and build-ups, reviewed with you and marked up in Bluebeam until the shape is agreed.
Deliverable: GA set · PDFDetail & fabrication
Every section, fixing and cut-out resolved. Cut lists, bills of materials and nested profiles for the shop floor.
Deliverable: DWG · DXF · STEPIssue & support
Issued for construction under revision control, with a register, transmittal and RFIs answered against the same model.
Deliverable: IFC packageMost packages fail in the detail — so that is where we start.
Send the spec.
Get a real answer.
Drawings, a scope, or a photo of the opening — whatever you have. You'll get a scoped fee and a programme back, usually within two working days. Not a brochure.