Issue day. You have the architectural set from one consultant, structural from another, MEP as three separate exports, and a cover sheet you built yourself. The client wants one PDF, sheets in discipline order, ready to log into the document control system. Doing that by hand — extract, drag, re-save, repeat — is where issue packages go wrong.
Here's how to assemble a clean, correctly ordered issue set without babysitting each file.
Why sheet order matters more than it looks
A drawing package isn't just a bag of pages. The order encodes the reading sequence a reviewer expects: general arrangement before details, plans before sections, low sheet numbers before high. When the order is wrong, three things happen:
- Reviewers miss sheets because they stop where they expect the discipline to end.
- The document control system indexes pages by position, so a misordered upload mislabels every sheet after the error.
- Printed sets come off the plotter in the wrong sequence and have to be hand-sorted.
Getting the order right at assembly is far cheaper than fixing it downstream.
How do I combine multiple discipline PDFs into one set?
The reliable sequence:
- Collect the latest revision of each discipline. Confirm you're working from the current revision of every file before merging — mixing a superseded structural set into an otherwise-current package is the most common issue-day error.
- Order by discipline, then sheet number. The conventional AEC order is General → Civil → Structural → Architectural → Mechanical → Electrical → Plumbing, each block sorted by sheet number. Put your cover sheet and sheet index first.
- Merge into a single file. Combine the ordered files into one PDF. Keep the page sizes as-is — mixing A1 and A3 sheets in one file is fine and normal for a set.
- Verify the sheet index against the actual pages. The index should match the merged order exactly. This is the check that catches a dropped or duplicated sheet.
The free Arsoom sheet organizer does this in the browser: upload up to five PDFs, drag pages into any order across files, and export one combined set. No pages are re-rendered, so linework and text stay intact.
How do I extract or split a package?
The reverse is just as common: a consultant asks for "just the structural sheets," or document control wants each discipline as a separate file. Rather than print-to-PDF page ranges (which rasterizes), extract the pages directly so the vectors survive. Split by discipline boundaries, not arbitrary page counts — a partial discipline is worse than none.
Frequently asked questions
Does merging PDFs change the drawing quality? No, if the tool copies pages rather than re-rendering them. Vector linework, text, and embedded fonts carry over unchanged. Avoid any "combine" feature that flattens or rasterizes — you'll lose searchable text and crisp line weights.
Can I mix sheet sizes in one issue PDF? Yes. A single PDF can hold A1 general arrangements and A3 details together. Viewers and plotters read each page's own size, so a mixed-size set prints correctly.
What about markups and revision clouds on the sheets? They travel with the pages when you merge. If you need a clean issue set without review markups, flatten or remove them before assembling — don't rely on the merge step to strip them.
How many files can I combine at once? The free tool takes up to five PDFs per session, which covers most discipline packages. For very large sets, merge in stages: combine each discipline first, then combine the discipline files into the final set.
Related: compressing a finished set for email and comparing what changed between revisions.
