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Safety Cue
Task-specific safety guidance for ordinary work hazards.
Project 16
Frame and Sheath a Shed Roof
Select the approved rafter or truss roof-framing option for the accepted shed walls, cut or set the roof structure, install ties, blocking, and permanent bracing, sheath the roof deck, and inspect the framed and sheathed roof before any weatherproof roofing assembly begins.
Field Cue System
These cues appear at the point of work. They identify safety, code, manufacturer, and measurement issues before they become rework or hazards.
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Critical Safety Cue
Serious injury, fall, or major damage is possible.
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Field Safety Cue
Practical work-area safety: footing, cords, roof-edge, 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 trusses, connectors, and sheathing.
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Measurement Cue
Clearance, spacing, pitch, and overhang guidance.
Job Overview
This project qualifies you to frame, brace, connect, sheath, and inspect one small shed roof using either site-built rafters or prefabricated trusses, exactly as specified by the approved shed plan. The finished work product is a fully framed, permanently braced, uplift-connected, sheathed, and inspected roof structure, protected temporarily and ready for the weatherproof roofing assembly covered by Book 5.
You will select the approved roof-framing option, confirm the walls beneath it are plumb, braced, and accepted, establish safe access and fall-protection controls, cut or receive the rafters or trusses, raise and connect them to the wall plates with listed uplift connectors, install ridge, ties, blocking, and permanent bracing, sheath the roof deck to the approved pattern and fastening schedule, and inspect the complete roof structure before any covering is installed.
This project assumes Project 15, Frame Shed Walls and Openings, is complete and accepted, and it hands off a structurally sound, protected roof deck to Project 17, which installs siding, trim, and the shed door, and to the roofing sequence in Book 5. No sheathing is covered with finish roofing, and no truss is cut, drilled, or notched, until this project's required inspections are complete.
Skills You Will Demonstrate
- OS-091 — Lay out roof framing from the approved span, pitch, and framing plan.
- OS-092 — Cut rafters or install prefabricated trusses according to the approved design and manufacturer instructions.
- OS-093 — Install roof framing, including ridge, ties, blocking, gable framing, and permanent bracing.
- OS-094 — Sheath the roof deck to the approved orientation, spacing, and fastening schedule.
- OS-095 — Maintain approved overhangs, spacing, and alignment throughout framing and sheathing.
- OS-096 — Inspect the completed roof structure before any weatherproof roofing assembly is installed.
Where This Skill Fits
This project sits between Project 15's wall framing and Project 17's siding, trim, and door work, and it is the structural handoff point to Book 5's roofing sequence. Every eave, rake, and roof-plane condition referenced later in the siding and trim work depends on the framing and sheathing accepted here. A roof that has not passed the framing and sheathing inspection required by this project cannot be covered in Project 17 or roofed under Book 5.
The habit built in this chapter — confirming wall readiness before loading the roof, keeping temporary bracing in place until the permanent load path is complete, and never modifying a prefabricated truss without written engineering authorization — governs every later roofed structure in this book, from a garden shed to the Chapter 20 capstone if the shed option is selected.
Scope and Intended Use
This project covers:
- selecting the approved roof-framing option of site-built rafters or prefabricated trusses
- establishing safe scaffold, platform, ladder, lifting, and roof-edge fall-protection controls before framing begins
- laying out, cutting, test-fitting, and installing rafters, or receiving, inspecting, and installing trusses without modification
- connecting rafters or trusses to wall plates with listed uplift connectors
- installing ridge, rafter ties, ceiling ties, blocking, gable framing, and permanent bracing
- sheathing the roof deck with approved orientation, spacing, clips, and fastening schedule
- inspecting the completed roof structure and installing temporary weather protection or coordinating immediate underlayment
This project does not authorize the learner to:
- cut, drill, notch, or otherwise modify a prefabricated truss without written engineering authorization
- remove temporary bracing before permanent ties, blocking, and bracing establish a complete stable load path
- load the roof frame or walk on unsupported sheathing edges before framing is inspected
- treat sheathing as a finished, weatherproof roof, or defer temporary weather protection when rain is possible before roofing begins
- proceed to Project 17 or to roofing under Book 5 with an incomplete or unsigned framing and sheathing inspection
Any framing member, connector, or sheathing condition that cannot be confirmed against the approved plan must be resolved before this project is declared complete.
Reference Conventions
Establish these references before any layout begins, and do not change them mid-project.
| Term | Definition |
|---|---|
| Rafter | A site-built sloped structural member running from the wall plate to the ridge, cut to the approved plumb, seat, and tail geometry |
| Truss | A prefabricated, engineered roof-framing assembly installed as delivered and never field-cut, drilled, or notched without written engineering authorization |
| Birdsmouth | The notch cut into a rafter where it bears on the wall plate; cut only within the approved notch limits so the remaining rafter depth carries the design load |
| Ridge | The horizontal member at the peak of the roof to which opposing rafters are connected |
| Rafter tie / ceiling tie | A horizontal member resisting outward thrust at the wall plates, installed per the approved spacing and connection detail |
| Uplift connector | A listed metal connector resisting wind uplift forces at the rafter-to-plate or truss-to-plate connection |
| Permanent bracing | The fixed bracing required by the approved design to keep rafters or trusses stable after temporary bracing is removed |
Site and Roof-Framing Record
Before cutting or raising any framing member, record the selected roof-framing option and reference data directly on the framing worksheet:
Roof-framing option (rafters / trusses): ______ Approved span: ______ Approved pitch: ______
Date started: ____________ Builder name: ____________
Prerequisites
- Project 15 wall framing complete, plumb, braced, anchored, and accepted by the required wall-framing inspection
- Approved roof span, pitch, snow, wind, and uplift design, with rafter or truss delivery documents on hand
- A defined lift plan and adequate workers or lifting equipment for raising rafters or trusses safely
- Fall-protection equipment, ladders, scaffold, or platforms rated for the height and duration of the work
- A full-size rafter pattern layout station, or truss manufacturer bracing instructions, ready before any member is raised
Common Field Fundamentals
Every roof framed under this project follows the same sequence: confirm the walls are ready, select and prepare the framing option, raise and immediately brace each member, connect with listed uplift hardware, install ties and permanent bracing, sheath to the approved schedule, and inspect before any covering goes on. Skipping ahead to sheathing before ties and bracing are complete is one of the most common causes of roof-framing rework.
Framing optionRafters or trusses selected and reviewed against the approved design
Access and fall protectionScaffold, ladders, lift plan, and fall protection staged before raising begins
Raise and braceEach member connected and temporarily braced before the next is set
Ties and permanent bracingRidge, ties, blocking, and permanent bracing installed per plan
SheathingPanels laid out, spaced, clipped, and fastened to the approved schedule
Inspection and protectionFraming and sheathing inspected; temporary weather protection installed
Rafters Versus Trusses
The approved plan specifies one roof-framing option, and that option is not substituted in the field. Site-built rafters require a verified pattern, correct birdsmouth geometry, and full ridge and tie connections. Prefabricated trusses require the exact bracing sequence in the manufacturer's shipping and installation documents and are never cut, drilled, or notched without written engineering authorization.
OS-091 – OS-096
Roof Framing and Sheathing Qualification
Frame and Sheath a Shed Roof
A. Finished-Project Specification
Deliverable: one complete shed roof structure using approved rafters or trusses, with ridge, ties, blocking, gable framing, permanent bracing, listed uplift connectors, sheathed roof deck, temporary weather protection, and a signed framing and sheathing inspection.
B. Assessed Roof-Framing Schedule (Component Schedule)
| Component | Quantity | Format | Standard | Preparation / Purpose |
|---|---|---|---|---|
| Framing-option selection | 1 | Worksheet entry | Rafters or trusses per approved plan, not substituted in field | Confirms the correct engineered framing approach |
| Access and fall-protection plan | 1 | Worksheet + equipment check | Ladders, scaffold, lift plan, fall protection staged | Establishes safe conditions before raising begins |
| Rafter or truss installation | Per plan | Framing + photos | Raised, connected, temporarily braced immediately | Builds the primary roof structure |
| Ties, blocking, permanent bracing | Per plan | Framing + photos | Ridge, ties, blocking, gable framing, bracing per detail | Completes the stable, uplift-resistant load path |
| Roof sheathing | Per plan | Panel installation | Approved orientation, spacing, clips, fastening schedule | Forms the roof deck for the weatherproof assembly |
| Framing and sheathing inspection | 1 | Signed worksheet | All sections complete and confirmed | Authorizes handoff to Project 17 and Book 5 roofing |
C. Material and Resource Takeoff
- Framing members: approved rafter stock and ridge board, or the prefabricated truss package specified by the plan.
- Connectors: listed rafter or truss uplift connectors, rafter ties, ceiling ties, and blocking hardware per the approved schedule.
- Sheathing: roof sheathing panels, sheathing clips where specified, and the approved fastener schedule.
- Access and protection: ladders, scaffold or platforms, temporary bracing stock, fall-protection equipment, and temporary weather-protection material.
D. Acceptance Standards
| Check | Standard |
|---|---|
| Framing option | Rafters or trusses installed exactly per the approved plan and manufacturer instructions, with no unauthorized truss modification |
| Raising and bracing | Every rafter or truss temporarily braced immediately upon raising; no member left unbraced |
| Connections | Listed uplift connectors installed at every rafter-to-plate or truss-to-plate connection specified by the plan |
| Ties and permanent bracing | Ridge, ties, blocking, gable framing, and permanent bracing installed per the approved detail before temporary bracing is removed |
| Spacing and overhang | Rafter or truss spacing, ridge alignment, and overhangs verified at both eaves and both rakes |
| Sheathing | Panels installed to approved orientation, staggered joints, spacing, clips, and fastening schedule |
| Inspection and protection | Framing inspected before sheathing; completed roof inspected and temporary weather protection installed or roofing coordinated immediately |
E. Preparation — Framing-Option Review and Access Planning
- Select the approved roof-framing option. Confirm whether the plan specifies site-built rafters or prefabricated trusses, and do not substitute one for the other.
- Review roof span, pitch, snow, wind, uplift, overhangs, ridge, ties, connectors, sheathing, and ventilation requirements. Confirm the fall-protection plan for the height and duration of the work.
- Confirm shed walls are plumb, braced, anchored, and accepted. Verify the Project 15 wall-framing inspection is complete before loading the walls with roof framing.
- Establish safe scaffold, platform, ladder, lifting, and roof-edge controls. Stage temporary bracing stock and fall-protection equipment before the first member is raised.
F. Rafter Pattern Preparation (Site-Built Rafters)
- Prepare a full-size approved pattern. Use the approved span, pitch, and overhang dimensions from the plan.
- Mark plumb cut, seat cut, tail, ridge, and overhang. Lay out each cut line using a framing square and stair gauges.
- Verify birdsmouth and notch limits. Confirm the remaining rafter depth after the notch meets the approved bearing requirement.
- Cut the first rafter without overcutting. Stop each cut at the layout line to preserve full bearing and structural depth.
- Test-fit and approve the pattern. Set the first rafter in place at the wall plate and ridge location before cutting any additional rafters.
- Cut remaining rafters from the approved pattern. Use the tested rafter as the template only after it has been verified against the approved layout.
G. Truss Delivery and Handling (Prefabricated Trusses)
- Inspect delivery documents, orientation, damage, and bracing instructions. Confirm the truss package matches the approved design and span.
- Do not cut, drill, notch, or modify trusses. Any field change requires written engineering authorization before installation proceeds.
- Follow the manufacturer's temporary and permanent bracing instructions exactly. Truss bracing sequence is engineered and is not a field judgment call.
H. Raising, Connecting, and Bracing the Roof Structure
- Raise rafters or trusses using the approved lift plan. Use adequate workers or lifting equipment for the size and weight of each member.
- Install temporary bracing immediately. Brace each member before moving to the next so no framing is left unsupported.
- Connect rafters or trusses to wall plates with listed uplift connectors. Install every connector specified by the approved plan; do not omit or substitute hardware.
- Install ridge, rafter ties, ceiling ties, blocking, gable framing, and permanent bracing as specified. Complete every connection called for in the approved detail.
- Maintain spacing and overhang. Check rafter or truss spacing and overhang continuously as each member is set, not only at the end.
- Inspect framing before sheathing. Confirm spacing, ties, blocking, connectors, and permanent bracing are complete and correct before any sheathing panel is installed.
I. Roof Sheathing Installation
- Lay out roof sheathing with approved orientation and staggered joints. Follow the panel layout specified by the approved plan.
- Maintain panel spacing. Leave the specified gap between panels for material movement.
- Install clips where specified. Use panel edge clips called for by the approved design between supports.
- Fasten panels using the approved schedule. Follow the specified fastener type, size, and spacing pattern exactly.
- Keep workers off unsupported panel edges. Work from framing members or established supports, not from an unfastened panel edge.
- Complete eave, rake, and opening details. Finish sheathing at all roof edges and any specified openings per the approved detail.
J. Roof Inspection and Temporary Protection
- Inspect roof plane, pitch, framing, ties, connectors, bracing, sheathing, overhangs, and fasteners. Confirm every item on the Acceptance Standards table.
- Install temporary weather protection or coordinate immediate roof underlayment and covering. Do not leave sheathing exposed to weather without protection.
- State clearly that sheathing alone is not a finished roof. Confirm the weatherproof roofing assembly under Book 5 is scheduled before considering the roof complete.
- Document roof inspection and roofing handoff. Record framing, connector, sheathing, and protection details for the project file.
K. Recheck and Closeout Procedure
- Recheck every incomplete or unclear item. Classify each gap as missing documentation, an unconfirmed connection, an unresolved spacing or overhang issue, or an unresolved sheathing condition before closing it out.
- Label and retain the completed roof-framing and sheathing package. Store it for reference and reuse throughout the rest of this book.
Common Inspection Review
Inspect the completed roof structure using the same checks regardless of whether rafters or trusses were selected.
- Framing-option check: confirm the installed structure matches the approved plan and no truss was modified without engineering authorization.
- Connection check: confirm every listed uplift connector, tie, and blocking piece specified by the plan is installed.
- Bracing check: confirm permanent bracing is complete before any temporary bracing was removed.
- Spacing and overhang check: confirm rafter or truss spacing, ridge alignment, and overhangs meet the approved plan at both eaves and both rakes.
- Sheathing check: confirm panels are installed to the approved orientation, spacing, clips, and fastening schedule.
- Protection check: confirm temporary weather protection is installed or roofing is scheduled immediately.
Complete the Roof Framing and Sheathing Worksheet in the Inspection Checklist section below before beginning Project 17.
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Failure Points and Troubleshooting
Cleanup
This project ends with the roof structure documented, protected, and staged for the next project, not discarded.
- Leave permanent bracing in place; remove only bracing explicitly designated as temporary once the permanent load path is verified complete
- Photograph the completed framing before it is concealed by sheathing, and photograph the completed sheathing before roofing
- Store leftover rafter stock, connectors, and sheathing offcuts for reuse in Project 17 or later trim work where appropriate
- Label and file the completed framing worksheet, connector schedule, and inspection records together
- Return the signed roof-framing and sheathing worksheet to the project records for reference throughout the rest of this book
Field Terms
- Rafter
- A site-built sloped structural member cut to the approved plumb, seat, and tail geometry.
- Truss
- A prefabricated, engineered roof-framing assembly installed without field modification.
- Birdsmouth
- The bearing notch cut into a rafter at the wall plate.
- Ridge
- The horizontal member at the roof peak connecting opposing rafters.
- Rafter Tie / Ceiling Tie
- A horizontal member resisting outward thrust at the wall plates.
- Uplift Connector
- A listed metal connector resisting wind uplift at framing connections.
- Permanent Bracing
- The fixed bracing required to keep framing stable after temporary bracing is removed.
- Roof Sheathing
- The structural panel deck installed over the roof framing.
- Overhang
- The horizontal projection of the roof beyond the wall face at the eave or rake.
- Framing Inspection
- The required checkpoint verifying framing is complete before it is concealed by sheathing.
Skill Check
- Why must the approved roof-framing option, rafters or trusses, never be substituted in the field?
- What must be verified about a rafter's birdsmouth cut before that rafter is accepted for installation?
- Why is a prefabricated truss never cut, drilled, or notched without written engineering authorization?
- Why must temporary bracing be installed immediately after each rafter or truss is raised, rather than after several members are set?
- What is the purpose of a listed uplift connector, and why can it not be substituted with ordinary fasteners?
- Why must framing be inspected before sheathing conceals it?
- What is the difference between temporary bracing and permanent bracing, and when can temporary bracing be removed?
- Why is sheathing alone not considered a finished roof?
- What are three possible reasons a roof-framing inspection might find an incomplete item, and how does the learner confirm which one occurred?
- Why must temporary weather protection be installed if roofing will not begin immediately after sheathing?
Competency Rubric
| Competency | Independent Pass Standard | Not Demonstrated | With Assistance | Independently |
|---|---|---|---|---|
| OS-091 | Lays out roof framing accurately from the approved span, pitch, and framing plan | |||
| OS-092 | Cuts rafters or installs trusses exactly to the approved design and manufacturer instructions, without unauthorized modification | |||
| OS-093 | Installs ridge, ties, blocking, gable framing, and permanent bracing per the approved detail | |||
| OS-094 | Sheaths the roof deck to the approved orientation, spacing, and fastening schedule | |||
| OS-095 | Maintains approved overhangs, spacing, and alignment throughout framing and sheathing | |||
| OS-096 | Inspects the completed roof structure and installs temporary protection before any weatherproof roofing assembly begins |
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 — Roof Framing and Sheathing Worksheet
| Item | Standard | Recorded Finding | Confirmed (Y/N) | Correction (if any) |
|---|---|---|---|---|
| Framing-option selection | Matches approved plan; no unauthorized truss modification | |||
| Bracing | Temporary bracing on every raised member; permanent bracing complete | |||
| Connectors and ties | Listed uplift connectors, ridge, ties, and blocking installed per plan | |||
| Spacing / overhang | Verified at both eaves and both rakes | |||
| Sheathing | Approved orientation, spacing, clips, and fastening schedule followed | |||
| Protection | Temporary weather protection installed or roofing scheduled immediately |
Framing option used: ____________ Rationale summary: ____________
Roof structure declared ready for roofing: ______ (Pass/Fail) Date: ____________ Builder name: ____________
Performance Check
With all six worksheet items recorded, review the completed roof structure against the Acceptance Standards table and confirm the correct framing option was used without unauthorized modification, every rafter or truss was braced immediately and remains permanently braced, listed uplift connectors and ties are installed per the approved plan, spacing and overhangs are verified at both eaves and rakes, sheathing follows the approved orientation and fastening schedule, and temporary protection is installed before roofing. Complete the Roof Framing and Sheathing Worksheet and correct any incomplete item before beginning Project 17. If an item is incomplete, identify whether the gap is missing documentation, an unconfirmed connection, an unresolved spacing or overhang issue, or an unresolved sheathing condition before rechecking it.
Project Closeout
You have completed the sixteenth project in the outdoor structures sequence: framing and sheathing a shed roof. This project required you to lay out roof framing (OS-091), cut rafters or install trusses without unauthorized modification (OS-092), install ridge, ties, blocking, gable framing, and permanent bracing (OS-093), sheath the roof deck to the approved schedule (OS-094), maintain approved spacing and overhangs (OS-095), and inspect the completed roof structure before any roofing assembly begins (OS-096).
You now have a fully framed, braced, connected, sheathed, and inspected shed roof, protected temporarily and ready for the weatherproof roofing assembly coordinated with Book 5. That structure carries directly into the next project: installing shed siding, trim, and the shed door.
Store your signed roof-framing and sheathing worksheet with the project records. You will reference the framing option, connector schedule, and sheathing details recorded here throughout the rest of this book.