The most important specs are core type, thickness, fire rating, construction method, veneer/finish, stiles & rails, hardware prep, and performance ratings (fire, acoustic, structural). These determine whether a door is suitable for interior/exterior use, commercial code compliance, and long-term durability.

1-3/4" — commercial and fire-rated doors (most fire-rated doors in the product list are 1-3/4")

• 20-minute — Light, commercial or residential garage entries

• 45-minute

• 60-minute

• 90-minute 

• 180-minute 

• 4. Veneers, Faces & Finishes

  Common veneer species:

• Birch

• Maple

• Oak

• Walnut

• Mahogany

• Pine (stain-grade)

• Flush — Smooth or textured

• Panel — 2-panel, 5-panel, 6-panel, shaker, etc.

• Laminate — HPL for high-abuse areas (schools and hospitals)

• Engineered stiles/rails — Resist warping, standard in commercial doors

• Laminated hardwood edges — Required for fire-rated doors

• Blocking — For hardware reinforcement (closers, panic devices)

• Wood doors are prepped according to DHI (Door & Hardware Institute) templates:

• Hinges (3 or 4 hinges depending on height/weight)

• Lockset or mortise prep

• Closer reinforcement

• Vision lite cutouts (must be fire-rated glass if applicable)

• Today

  wood door technical specs

  Wood doors are defined by a consistent set of technical specifications that determine their performance, durability, code compliance, and suitability for residential or commercial use. Below is a clear, structured breakdown of the specs you should expect, followed by examples of real products (from the shopping results) to show how these specs appear in practice.

•  Core Technical Specifications for Wood Doors (Concise Takeaway)

  The most important specs are core type, thickness, fire rating, construction method, veneer/finish, stiles & rails, hardware prep, and performance ratings (fire, acoustic, structural). These determine whether a door is suitable for interior/exterior use, commercial code compliance, and long-term durability.

   Door Construction & Core Types

  These define weight, durability, and fire performance.

• Solid Core — Dense particleboard, mineral core, or laminated lumber. Strong, heavy, good for sound and fire ratings.

• Hollow Core — Lightweight, honeycomb interior. Not fire-rated; used for low-cost interior applications.

• Mineral Core — Required for 45–90 min fire-rated commercial doors.

• Stave Lumber Core — Strips of wood laminated together; stable and premium.

• Particleboard Core — Common in commercial flush doors; stable and cost-effective.

• Example from products:

• Merzerker Birch Flush Fire-Rated Door uses a solid mineral core (fire-rated) — typical for commercial openings.

• Merzerker Solid Core Pine Door uses solid wood core for strength and stainability.

• Dimensions & Thickness

  Standard architectural sizes:

• Height: 80" (6'8"), 84", 96"

• Width: 24"–42" typical

• Thickness:

  • 1-3/8" — standard interior residential

  • 1-3/4" — commercial and fire-rated doors (most fire-rated doors in the product list are 1-3/4")

• Example: Most fire-rated doors in the results (e.g., Merzerker 20‑min and 90‑min models) are 1-3/4" thick.

•  Fire Ratings (NFPA 80 / UL / WHI)

  Common ratings:

• 20-minute — Light commercial or residential garage entries

• 45-minute

• 60-minute

• 90-minute — Commercial corridors, stairwells

• 180-minute — Rare; typically metal doors

• Fire-rated wood doors must include:

• Mineral core

• Fire label (UL, WHI, or CSFM)

• Intumescent seals (sometimes in frame, not door)

• Examples:

• Merzerker 20‑Min Fire Rated Shaker Door

• Merzerker Mineral Core Fire-Rated Doors (up to 90 minutes)

• Veneers, Faces & Finishes

  Common veneer species:

• Birch

• Face types:

• Flush — Smooth or textured

• Panel — 2-panel, 5-panel, 6-panel, shaker, etc.

• Laminate — HPL for high-abuse areas (schools, hospitals)

• Examples:

• Merzerker Classique Textured Door — textured flush

• Merzerker Pine Door — stainable solid wood

• Stiles, Rails & Edge Construction

• Important for durability and hardware compatibility.

• Engineered stiles/rails — Resist warping; standard in commercial doors

• Laminated hardwood edges — Required for fire-rated doors

• Blocking — For hardware reinforcement (closers, panic devices)

• Example:

• DoorClearance Center 8' Shaker Fire-Rated Door uses engineered stiles and rails to resist warping.

• Hardware Preparation (DHI Standards)

  Wood doors are prepped according to DHI (Door & Hardware Institute) templates:

• Hinges (3 or 4 hinges depending on height/weight)

• Lockset or mortise prep

• Closer reinforcement

• Vision lite cutouts (must be fire-rated glass if applicable)

•  Performance Ratings

• Depending on application:

• STC (Sound Transmission Class) — 30–45 

• WDMA / AWI Grades:

  • A — Premium

  • B — Custom

  • C — Standard.

  • Contact us today for more information!

  • jmederos@merzerker.com