Door slab trimming, Trim slab to height, Trim slab to width – Therma-Tru SHOP 3 Door Preparation - U1 Revised User Manual
Page 6
Door
Preparation
3.6
2014 (U1 REVISED)
Shop 3
Door Slab Trimming
Trim Slab to Height
- Measure and mark door slab.
- Cut along line with saw, using
carbide-tipped blade. If available,
use panel saw.
- Touch up edges with a rasp or
sandpaper.
- Trimming the bottom rail may
prevent the kerf door bottom from
fitting properly. A replacement
staple-on door bottom may need
to be used.
Trim Slab to Width
- Set planer cutting depth.
- Plane edges of slab.
- Sand smooth if required.
- Paint with primer if required to match
original finish.
C
Hinge
Stile
D
Lock
Stile
A
Top
Rail
B
Bottom
Rail
Maximum height and width trims for doors.
Standard
Doors
a
A
Top Rail
B
Bottom Rail
C
Hinge Stile
D
Lock Stile
Classic-Craft
1-1/4"
1-1/4"
1/32"
b
1/32"
b
Fiber-Classic
1/4"
1/4"
1/32"
1/32"
Smooth-Star
1/4"
1/4"
1/32"
1/32"
Steel Doors
1/4"
1/4"
1/16"
1/16"
b
Inspect corners to verify hardwood thickness before trimming.
Impact
Doors
A
Top Rail
B
Bottom Rail
C
Hinge Stile
D
Lock Stile
Classic-Craft
1"
1"
N/A
N/A
Fiber-Classic
N/A
N/A
N/A
N/A
Smooth-Star
N/A
N/A
N/A
N/A
Steel Doors
c
N/A
N/A
N/A
N/A
Fire Rated
Doors
A
Top Rail
B
Bottom Rail
C
Hinge Stile
D
Lock Stile
Classic-Craft
d
N/A
3/4"
1/32"
1/32"
Fiber-Classic
d
N/A
1/4"
1/32"
1/32"
Smooth-Star
d
N/A
1/4"
1/32"
1/32"
Steel Doors
e
N/A
N/A
1/16"
1/16"
c
Standard steel doors are impact-rated, but cannot be trimmed
when requiring an impact product approval, see re-sizing section.
d
Fiberglass 20-minute positive pressure fire doors can only be
trimmed by Warnock-Hersey or NAMI certified re-machiners.
e
Standard wood-edge steel doors may be fire-rated (if appropriately
labeled), but cannot be trimmed in height when being used as a fire
door, see re-sizing section. 90-minute steel edge fire doors cannot
be trimmed, see 90-minute fire door re-sizing section.
a
Standard doors requiring structural product approval or
certification cannot be trimmed.