571-323-3636
ANSI/AWI 0622.0646–2024 - Millwork & Wood Trim
3.3 Structural
a) Construction methods and materials shall be consistent throughout the project.
b) Panels shall have adequate space to move, float, expand, and/or contract as a result of temperature and/or relative humidity.
c) Built-up components shall be fabricated with half lapped, mitered, miter fold, shoulder mitered, tongued, or equivalent joinery methods.
d) Cutouts and/or other related alterations shall maintain the structural integrity of Product.
e) Inside corners shall be furnished oversized for field fitting and installation.
3.3.1 Shop-Fabricated Assembly Joints
a) Shall be securely attached.
b) Shall be glued and mechanically fastened.
c) Shall fit tight and flush.
d) Joints exceeding 101.6mm [4”] in width shall be:
| Premium | Custom | Economy |
|---|---|---|
| Biscuit spline, butterfly, scarf, or dowel | Clamp nail, biscuit spline, butterfly, scarf, or dowel | At the option of the manufacturer/supplier |
e) At stile and rail assemblies shall be built up in units as large as practical and:
| Premium | Custom | Economy |
|---|---|---|
| Components shall be mortised and tenoned, doweled, or splined | Components shall be mortised and tenoned, doweled, or splined | Pocket screw or biscuit spline joinery |
3.3.1.1 Trim Components and Assemblies
a) Applied mouldings shall be spot-glued and mechanically fastened.
3.3.2 Radius Components and Assemblies
a) Assemblies shall be fabricated from components in the longest practical length.
b) Factory assembled in sections as large as practical for field installation.
c) Radius woodwork assemblies require construction of solid machined, block laminate plies, veneer core or kerfed solid wood (See Figure 160).
d) Solid machined and block laminated components shall be divided to minimize the exposure of cross grain in the face of the member.
e) Angle of grain at the face of the curved member shall not exceed 30 degrees, unless a small part size requires otherwise (See Figure 161).
f) Dado joinery shall completely house the male member throughout the entire length of joint.
g) Chord segmentation is not permitted (See Figure 162).
3.3.2.1 Transparent Finish
a) Radius frames shall be constructed of:
| Premium | Custom | Economy |
|---|---|---|
| Laminated plies or veneer faced block cores | Laminated plies or veneer faced block cores | At the option of the manufacturer/supplier |
b) When laminated, resawn solid wood shall be reassembled in the same order and orientation as sawn:
| Premium | Custom | Economy |
|---|---|---|
| Required | Required | At the option of the manufacturer/supplier |
c) Joinery at straight legs to radius members shall be:
| Premium | Custom | Economy |
|---|---|---|
| Spline or half-lap, glued and mechanically fastened | Spline or half-lap, glued and mechanically fastened | At the option of the manufacturer/supplier |
d) Block lamination at segmented materials shall be:
| Premium | Custom | Economy |
|---|---|---|
| Cut from same board when practical | Cut from same board when practical | At the option of the manufacturer/supplier |
e) Block lamination at segmented joints shall be staggered.
f) Block lamination shall have similar grain angle at adjacent segment ends.
3.3.3 Decorative Laminate
a) Inside corners of cut outs shall have a minimum 6.4 mm [.250”] radius.
| Premium | Custom | Economy |
|---|---|---|
| 610 mm [24″] | 1219 mm [48″] | 1829 mm [72″] |
