Guides
Division 08, explained in plain English
Doors, frames and hardware come with their own vocabulary. These guides cover the terms, documents and workflows distributors and estimators deal with every day. No jargon left unexplained.
All guides
14 guides to doors, frames and hardware
- What is a mullion?A mullion is the vertical member that divides adjacent units in a window or door opening. Here is what that means in architecture and in Division 08 door work.
- What is Division 08?Division 08 is the Openings section of a commercial construction spec: doors, frames, entrances, windows, glazing and hardware. Here is what it covers and who works in it.
- Hollow metal doors and framesHollow metal doors and frames are formed steel used across commercial buildings. Here is what they are, common gauges, where they fit, and how they compare to wood and aluminum.
- Fire-rated hollow metal doors and framesFire-rated hollow metal doors close openings in fire-rated walls. Here is how ratings work, what the fire label means, the hardware required, and why field changes can void it.
- Knock-down vs welded framesKnock-down frames ship flat and assemble in the field; welded frames arrive as one rigid unit. Here are the real trade-offs on cost, shipping, install and where each fits.
- Removable mullions explainedA removable mullion lets a pair of doors clear the full opening when you need it. Here is how they work, keyed and electrified options, and fire-rating rules.
- Door schedules explainedA door schedule lists every opening on a project with its size, type, rating, hardware and finish. Here is what it contains, who uses it and how to read it.
- Door hardware schedules explainedA door hardware schedule lists the hardware for every opening, grouped into sets. Here is what it contains, who writes it, and how distributors price from it.
- Door hardware sets explainedA door hardware set groups all the hardware for one type of opening under a number. Here is what a set lists, how it maps to openings, and how to price from it.
- Division 08 submittalsWhat a Division 08 submittal package is, what it contains and how it moves through review and approval, so doors, frames and hardware get approved before you order.
- DHI certification and the AHC credentialDHI is the trade body for the door and hardware industry, and the AHC is its hardware-consultant credential. Here is what they are and why the certifications matter.
- Pricing a Division 08 bidHow a door, frame and hardware distributor prices a commercial bid, step by step: from the door schedule and takeoff to price books, margin and the proposal.
- Change orders on door jobsChange orders are constant on door and hardware jobs. Here is what causes them, what they cost, and how to document, price and track them without losing the thread.
- Estimating off spreadsheetsMost door and hardware distributors still estimate in Excel. An honest look at why it works, where it breaks down, and when a spreadsheet stops being enough.
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Opening 114 Priced
HM door + frame · HW-12
From current book$1,284