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Safety Cue
Task-specific safety guidance for ordinary work hazards.
Project 06
Install Interior Door Hardware and Adjust Operation
Install a complete interior latch set on an already-hung door and adjust hinges, latch, and strike until the door swings smoothly, closes without contact, and latches reliably.
Field Cue System
These cues appear at the point of work. They identify safety, code, manufacturer, and measurement issues before they become rework, callbacks, or hazards later in the book.
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Critical Safety Cue
Serious injury, fire, or major damage is possible.
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Field Safety Cue
Practical work-area safety: lighting, cords, footing, and housekeeping.
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Code Alert
Local requirements vary. Verify permit, inspection, and jurisdictional rules.
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Manufacturer Cue
Follow product-specific instructions for tools, materials, and equipment.
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Measurement Cue
Clearance, layout, spacing, and reference-point guidance.
Job Overview
This project qualifies you to install a complete interior latch set into a previously bored and mortised door and to adjust the door's hinges, latch, and strike until the door operates smoothly and latches reliably. The finished work product is one operating interior door with an installed latch or lockset, a properly positioned and fastened strike plate, and a documented record of every adjustment made to correct binding, rubbing, or unreliable latching.
You will review the hardware manufacturer's instructions, confirm the door and frame are securely installed, install the latch and handles, mark and install the strike plate, diagnose and correct hinge binding and other contact problems within the permitted correction scope, adjust the strike for reliable engagement, and inspect the finished door for reveal, swing, latch function, handle return, strike security, and floor clearance.
This project depends directly on Project 05, which installed and plumbed the prehung door and frame this hardware is installed into. It also depends on the casing reveal established in Project 01 and applied in Project 04, since casing must remain in place and undisturbed while this hardware is installed. The adjusted, latching door produced here is the door that Project 18 later prepares for paint or stain finishing.
Skills You Will Demonstrate
- FC-031 — Install the latch set in the correct bevel orientation and secure the faceplate and handles without stripping screws.
- FC-032 — Mark and install the strike plate at the correct location on the strike jamb using the specified screws.
- FC-033 — Adjust the door reveal at the head, hinge, and strike jambs within the permitted correction scope.
- FC-034 — Diagnose and correct hinge binding, hinge-side rubbing, and other contact problems using approved correction methods only.
- FC-035 — Align latch operation so the latch engages the strike without excessive force or rattle, for both privacy and passage function as applicable.
- FC-036 — Inspect finished door function, including reveal, swing, latch engagement, handle return, strike security, and floor clearance, and document adjustments and any unresolved opening defects.
Where This Skill Fits
Project 05 set the door plumb in its frame with consistent reveals but installed no operating hardware. This project completes that door by installing the latch set that lets it actually be used, and by correcting the small alignment problems — binding, rubbing, uneven contact — that only become visible once the door is repeatedly operated under load.
The reveal and swing standards you verify here are the same standards the Chapter 20 capstone re-checks before a room is handed off for paint or stain. A door that passes this project's inspection should not need hinge or strike correction again during the capstone walk-through.
Scope and Intended Use
This project covers:
- reviewing the hardware manufacturer's instructions for backset, handing, latch orientation, and strike location
- confirming the door and frame are securely installed before hardware work begins
- installing the latch, faceplate, and inside and outside handles or knobs
- marking, positioning, and fastening the strike plate
- testing latch engagement and door closure
- diagnosing hinge binding, rubbing, and contact problems and correcting them using hinge adjustment, shimming, planing, or strike adjustment only, within the permitted correction scope
- adjusting the strike so the latch engages without excessive force or rattle
- testing privacy or passage function as applicable to the hardware installed
- inspecting reveal, swing, latch, handle return, strike security, and floor clearance
- documenting adjustments made and any unresolved opening defects
This project does not authorize the learner to:
- rehang, replumb, or reset a door or frame that is not already securely installed; unresolved installation defects are referred back to Project 05 or to a qualified professional
- alter fire-rated doors, self-closing devices, labeled frames, or smoke seals beyond the approved listed hardware and installation details
- enlarge a bore, mortise, or strike pocket beyond the correction limits stated in Section J of this project's work order
- substitute hardware, backset, or fastener specifications different from the approved hardware schedule without documenting the change and the reason
Any door that cannot be brought to a reliable latching, smooth-swinging condition within this project's permitted correction scope must be documented as an unresolved opening defect and referred to a qualified professional before the room proceeds to Project 18.
Reference Conventions
Establish these references before any hardware measurement is recorded, and do not change them mid-door.
| Term | Definition |
|---|---|
| Backset | The horizontal distance from the door edge to the center of the bore, matched to the specified latch set and not altered during this project |
| Latch bevel | The angled face of the latch bolt, oriented so the bolt retracts as the door closes and extends once past the strike opening |
| Strike center | The point on the strike jamb transferred from the latch centerline with the door closed, used to position the strike-plate mortise |
| Reveal | The consistent gap maintained between the door face and the jamb at the head, hinge, and strike sides, established in Project 05 and preserved through this project |
| Permitted correction scope | The specific set of adjustment methods allowed in this project: hinge adjustment, shimming, planing, and strike adjustment, used only within the limits stated in Section J |
| Passage and privacy function | Passage hardware latches without locking; privacy hardware adds a locking function operable from the room side, each tested according to the installed hardware type |
Hardware Installation Record
Before installing any hardware, record the door identity and hardware reference directly on the work order:
Room or opening: ______ Door schedule reference: ______ Hardware manufacturer and model: ______ Function (passage / privacy / dummy): ______
Date started: ____________ Installer name: ____________
Prerequisites
- Project 05 readiness confirmed: door and frame plumb, securely fastened, and swinging freely with consistent reveals
- Hardware manufacturer's instructions available for the specific latch set being installed
- Confirmed backset, handing, and bore diameter match the specified hardware
- Bore, edge mortise, and hinge screws inspected and free of shipping damage
- Working lighting at the door and access to both sides of the door without obstruction
Common Field Fundamentals
Every latch installation in this project depends on three conditions: the door and frame are already correctly hung, so hardware work never substitutes for frame correction; the latch is installed in the correct bevel orientation so it retracts and extends properly as the door closes; and any binding or rubbing found during testing is corrected using only the permitted methods, applied at the specific point of contact identified by diagnosis rather than by forcing the door or over-tightening hardware.
LatchBore, faceplate, and handles installed in correct orientation with even screw tension
StrikeLocation transferred from the closed latch center and mortised to the specified depth
Contact pointsHinge, head-jamb, and strike-side contact diagnosed and corrected within the permitted scope
FunctionLatch engagement, handle return, and privacy or passage operation tested and confirmed
Diagnosing Binding Before Adjusting Anything
Close the door slowly and watch where it makes contact before it reaches its final position. Binding at the top corner of the hinge side points to a different correction than binding at the bottom of the strike side. Identify the exact contact point first; do not begin tightening hinge screws or planing an edge until the contact point is confirmed.
FC-031 – FC-036
Installation / Adjustment Qualification
Interior Door Hardware Installation and Operation Adjustment
A. Finished-Project Specification
Quantity: one complete latch installation and adjustment per interior door, consisting of an installed latch, faceplate, and handle set; a positioned and fastened strike plate; documented hinge, reveal, and contact-point adjustments; and a completed function and inspection record.
B. Component Schedule
| Component | Quantity | Material | Finished Size | Preparation |
|---|---|---|---|---|
| Latch or lockset body | 1 per door | Per approved hardware schedule | Matched to existing bore diameter and backset | Inspected for shipping damage before installation |
| Latch faceplate | 1 per door | Matched to latch body finish | Matched to door-edge mortise | Seated flush in the edge mortise before fastening |
| Inside and outside handles or knobs | 1 set per door | Matched to specified hardware finish and function | Per manufacturer spindle length | Aligned before tightening mounting screws |
| Strike plate | 1 per door | Matched to latch body finish | Matched to strike-jamb mortise | Positioned from the transferred latch centerline |
C. Material and Documentation Takeoff
- Hardware: one approved interior latch set per door, matched to the existing bore, backset, and specified function.
- Fasteners: faceplate screws, handle mounting screws, and strike-plate screws as supplied with the approved hardware; approved longer hinge or strike screws only where the correction step specifies them.
- Reference documents: hardware manufacturer's instructions, the door schedule entry for this opening, and the Project 05 installation record for this door.
D. Fastener and Hardware Schedule
| Joint / Location | Fastener / Hardware | Head / Drive | Quantity | Notes |
|---|---|---|---|---|
| Latch faceplate | Screws supplied with latch set | Per manufacturer specification | Per manufacturer specification | Set flush in faceplate mortise without stripping the screw head |
| Handle or knob mounting | Screws supplied with hardware set | Per manufacturer specification | Per manufacturer specification | Tightened evenly on both sides to avoid distorting the escutcheon |
| Strike plate | Screws supplied with hardware set, or approved longer strike screws where specified | Per manufacturer specification | Per manufacturer specification | Longer screws used only where reaching jamb framing is specifically required |
| Hinge correction | Approved longer hinge screws, only where correction requires reaching framing | Per manufacturer specification | As required by the specific correction | Installed without distorting the hinge leaf or jamb |
E. Acceptance Standards
| Check | Standard |
|---|---|
| Latch orientation | Bevel faces the direction that allows the bolt to retract on closing and extend once past the strike opening |
| Faceplate seating | Faceplate seated flush with the door edge, no proud edges or gaps |
| Strike alignment | Strike-plate opening aligned with the latch bolt path with no visible offset |
| Latch engagement | Door closes and latches with normal closing effort, without slamming or excessive force |
| Reveal consistency | Head, hinge, and strike reveals consistent with the values established in Project 05, within the tolerance stated in that project |
| Swing clearance | Door swings through its full arc without contacting jamb, casing, or floor at any point |
| Handle return | Handles or knobs return fully to the neutral position after operation without binding |
| Documentation | Every adjustment made and any unresolved defect recorded on the work order |
F. Document Review and Confirmation of Readiness
- Review the hardware instructions, door preparation, backset, handing, latch orientation, and strike location. Confirm the specified latch set matches the door schedule for this opening before opening the hardware packaging.
- Confirm the door and frame are securely installed. Verify against the Project 05 record that the door is plumb, fastened, and swinging freely with no open shims or unresolved reveal issues.
- Inspect the bore, edge mortise, hinge screws, and jamb for damage. Record any damage found before installing hardware.
G. Latch and Handle Installation
- Install the latch in the correct bevel orientation. Insert the latch body into the edge bore with the bevel facing the direction specified by the manufacturer's instructions for the door's swing direction.
- Secure the latch faceplate without stripping screws. Drive faceplate screws evenly and stop as soon as the faceplate seats flush; do not continue driving once resistance increases sharply.
- Install the inside and outside handles or knobs. Align the spindle and rose or escutcheon before engaging the mounting screws.
- Tighten mounting screws evenly. Alternate between screws on opposite sides of the assembly to avoid distorting the escutcheon or binding the spindle.
- Operate the latch before installing the strike. With the door open, press and release the latch bolt by hand to confirm smooth retraction and extension.
H. Strike Plate Location and Installation
- Mark the latch center on the strike jamb. Close the door to its resting position and mark the latch bolt's vertical center on the strike jamb using the manufacturer's transfer method.
- Position and fasten the strike plate using the specified screws. Center the strike-plate opening on the transferred mark, confirm the mortise depth matches the manufacturer's specification, and drive the specified screws.
- Test latch engagement and door closure. Close the door under normal closing effort and confirm the latch bolt enters and seats in the strike without forcing.
I. Diagnosing Binding and Contact Problems
- Diagnose hinge binding, hinge-side rubbing, head-jamb contact, strike-side contact, or floor drag. Close the door slowly through its full arc and identify the exact location and point in the swing where contact occurs.
- Tighten loose hinge screws. Check every hinge screw for looseness before considering any other correction method.
J. Permitted Correction Scope
- Install approved longer screws into framing where required. Use this correction only where a hinge has worked loose from the jamb framing behind the shim, and only with the screw length and location specified for this correction.
- Use hinge adjustment, shimming, planing, or strike adjustment only within the permitted correction scope. Shim behind a specific hinge leaf to correct localized binding; plane a door edge only at the identified contact point and only removing the minimum material needed to clear the contact; adjust the strike position only within the strike plate's mortise tolerance.
- Preserve required fire-door and labeled-frame conditions. Do not plane, shim, or otherwise alter a labeled fire-rated door or frame assembly outside the approved listed correction methods for that assembly; refer such conditions to a qualified professional.
K. Strike Adjustment and Function Testing
- Adjust the strike so the latch engages without excessive force or rattle. Reposition or re-mortise the strike within its plate tolerance until the door closes with normal effort and does not rattle when closed.
- Test privacy or passage function. Operate the locking function, if installed, from both sides according to the hardware's specified function, confirming it locks, unlocks, and releases as intended.
L. Final Inspection and Documentation
- Inspect reveal, swing, latch, handle return, strike security, and floor clearance. Confirm every item against the Acceptance Standards table.
- Document adjustments and unresolved opening defects. Record every correction made under Section J and any condition that could not be resolved within the permitted correction scope, and identify the professional responsible for further correction where required.
Common Cutting Inspection
This project performs no primary trim cutting. Apply the following checks to any material removed under the permitted correction scope, such as planing at a contact point.
- Minimum-removal check: confirm only the material needed to clear the identified contact point was removed.
- Reveal-preservation check: confirm the reveal established in Project 05 was not altered outside its stated tolerance by the correction.
- Edge-finish check: confirm a planed edge is smooth and does not leave a visible step or tool mark at the door face.
- Reassembly check: confirm any hardware removed for access during correction was reinstalled and retested.
Complete the Function and Adjustment Worksheet in the Inspection Checklist section below before beginning Project 07.
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Failure Points and Troubleshooting
Cleanup
This project ends with a fully operating door and a filed adjustment record, not with material disposal.
- Remove hardware packaging, template sheets, and any masking or protective film from the installed hardware
- Return chisels, punches, and drivers to storage in working condition
- Sweep any wood shavings or debris from planing corrections
- Compile the Hardware Installation Record, adjustment notes, and Function and Adjustment Worksheet into the room file established in Project 01
- Store any removed shims, spare hardware screws, or documentation with the room file for reference during later chapters
Field Terms
- Backset
- The horizontal distance from the door edge to the center of the bore, matched to the specified latch set.
- Latch Bevel
- The angled face of the latch bolt, oriented so it retracts on closing and extends past the strike opening.
- Strike Center
- The point on the strike jamb transferred from the latch centerline with the door closed.
- Permitted Correction Scope
- The approved adjustment methods for this project: hinge adjustment, shimming, planing, and strike adjustment.
- Passage Function
- Latch hardware that operates without a locking mechanism.
- Privacy Function
- Latch hardware with a room-side locking mechanism and an outside emergency release.
- Reveal
- The consistent gap between the door face and the jamb at the head, hinge, and strike sides.
- Faceplate
- The plate on the latch body that seats flush with the door edge and is fastened to hold the latch in the bore.
- Escutcheon
- The decorative plate or rose surrounding a handle or knob at its mounting point.
- Unresolved Opening Defect
- A binding, latching, or alignment problem that cannot be corrected within the permitted correction scope and must be referred to a qualified professional.
Skill Check
- Why must the latch be tested by hand before the strike plate is installed?
- How is the strike center located on the strike jamb, and why must it be transferred rather than estimated?
- What is the first correction to attempt when a door binds at a hinge, before any other adjustment method is used?
- What four correction methods make up the permitted correction scope for this project, and what limits apply to each?
- Why is planing a door edge restricted to the identified contact point rather than applied along the full edge?
- What must be verified about fire-rated or labeled door assemblies before any hardware correction is made?
- What symptom indicates a door rattles even though it latches, and what correction addresses it?
- Why must mounting screws for handles be tightened evenly rather than to full tightness on one side first?
- What must happen to a binding or latching problem that cannot be resolved within the permitted correction scope?
- Why must the reveal established in Project 05 be checked again after any correction made in this project?
Competency Rubric
| Competency | Independent Pass Standard | Not Demonstrated | With Assistance | Independently |
|---|---|---|---|---|
| FC-031 | Installs the latch set in the correct bevel orientation and secures the faceplate and handles without stripped screws | |||
| FC-032 | Marks and installs the strike plate at the correct transferred location with the specified screws | |||
| FC-033 | Adjusts and confirms door reveal at head, hinge, and strike jambs within the established tolerance | |||
| FC-034 | Diagnoses the exact contact point of any binding and corrects it using only the permitted correction methods | |||
| FC-035 | Adjusts strike engagement so the latch closes with normal effort, without rattle, and confirms privacy or passage function | |||
| FC-036 | Completes the full function inspection and documents every adjustment and any unresolved opening defect |
Mark one column per competency. Only Demonstrated Independently awards the competency; Demonstrated with Assistance authorizes additional supervised practice but does not complete the requirement.
Inspection Checklist — Function and Adjustment Worksheet
| Item | Inspected (Y/N) | Defect Found (Y/N) | Correction Applied | Reinspected (Y/N) | Result |
|---|---|---|---|---|---|
| Latch bevel orientation | |||||
| Faceplate seating | |||||
| Handle mounting and return | |||||
| Strike location and mortise | |||||
| Latch engagement | |||||
| Hinge-side contact | |||||
| Head-jamb contact | |||||
| Strike-side contact | |||||
| Floor clearance | |||||
| Privacy or passage function |
Total open deficiencies: ____________ Total closed deficiencies: ____________
Final function status: ______ (Approved / Conditional / Referred) Date: ____________ Installer name: ____________
Performance Check
With hardware installed and adjustments complete, review the Function and Adjustment Worksheet against the Acceptance Standards table and confirm the latch operates smoothly in both directions, the strike is securely fastened at the correct transferred location, the door closes and latches with normal effort and without rattle, the reveal at head, hinge, and strike jambs matches the tolerance established in Project 05, the door swings through its full arc without contact, and the handles return fully after operation. Complete the worksheet and record the final function status before beginning Project 07. If any item cannot be closed within the permitted correction scope, record it as an unresolved opening defect and identify the professional responsible for further correction.
Project Closeout
You have completed the sixth project in the interior finish carpentry sequence: installing interior door hardware and adjusting door operation. This project required you to install the latch set in the correct bevel orientation with a secure faceplate and handles (FC-031), mark and install the strike plate at the correct location (FC-032), adjust the door reveal within the permitted correction scope (FC-033), diagnose and correct hinge binding and other contact problems using approved methods only (FC-034), align latch operation for reliable engagement and correct privacy or passage function (FC-035), and inspect and document the finished door's function and any unresolved defects (FC-036).
You now have a fully operating interior door, ready for the casing work already completed in Project 04 to remain undisturbed around it. That documentation carries forward directly into the next project, where the same reveal, adjustment, and inspection standards are applied to window stool, apron, and casing work.
Store the completed Hardware Installation Record and Function and Adjustment Worksheet in the room file. You will reference this door's documented condition through the Chapter 20 capstone.