Are trusses stronger than rafters?

Yes, trusses are generally stronger because their triangular geometry distributes loads efficiently across multiple members, allowing them to span longer distances without intermediate support.

Which is cheaper to install, rafters or trusses?

Trusses are typically cheaper to install because they arrive prefabricated and require less on-site labor, whereas rafters demand more skilled carpentry time and material cutting.

What are the safety risks of cutting a roof truss?

Cutting a roof truss is dangerous because it can compromise the engineered load path, potentially causing structural failure or roof collapse under snow, wind, or live loads.

Can rafters be used in a house designed for trusses?

Yes, rafters can replace trusses only if a structural engineer verifies the wall thickness, ceiling height, and load-bearing capacity, since rafters require different support spacing and ridge beams.

What is a common beginner mistake when building with rafters?

A common beginner mistake is cutting birdsmouth joints too deep, which weakens the rafter and reduces its load-carrying capacity at the critical wall connection point.

Are rafters and trusses interchangeable for attic space?

No, they are not interchangeable because trusses typically use web members that block usable attic space, while rafter systems leave open areas that are easier to finish into rooms.

Can I switch from trusses to rafters during a renovation?

Yes, you can switch from trusses to rafters during renovation, but you must add a structural ridge beam and temporary shoring while removing each truss to prevent roof sagging.

Which is better for a cathedral ceiling, rafters or trusses?

Rafters are better for cathedral ceilings because they allow an open, uninterrupted interior space, whereas trusses require exposed webs or complex modifications that reduce the visual ceiling height.

What is the real-world use case where rafters are preferred over trusses?

Rafters are preferred for custom homes with complex roof shapes, such as hips, valleys, and dormers, where prefabricated trusses cannot match the unique geometry without costly custom engineering.

Difference Between

Difference Between Rafters and Trusses

Written byNex Virox Team

Editorial Team

Reviewed byVarshal Nirbhavane

Senior SEO & Organic Growth Professional · 5+ years

Published: September 4, 202619 min read

Quick answer

The main difference between Rafters and Trusses is that rafters are individual sloping beams installed one at a time, while trusses are pre-engineered triangular frames. Rafters is a single structural beam supporting a roof directly, while Trusses is a prefabricated framework of connected members that distributes weight evenly.

Key takeaways

Core distinction: Rafters are individual sloping beams installed on-site, while trusses are pre-engineered triangular frames shipped as complete units.
Structural mechanics: Rafters transfer roof load directly to walls, whereas trusses distribute weight across multiple members to exterior bearing points.
Cost and labor: Trusses cost 30–50% less in labor but require crane installation; rafters need skilled carpenters and more on-site time.
Best-fit use case: Choose rafters for cathedral ceilings, attic spaces, or custom designs; trusses suit simple, repetitive roof layouts with open floor plans.
Common decision mistake: Selecting trusses for a remodeled attic ignores their web members, which block usable space; rafters allow future interior modifications.

Table of Contents18 sections

Difference Between Rafters and Trusses: Comparison Table

Aspect	Rafters	Trusses
Definition	Sloped structural beams running from ridge to wall plate, installed individually.	Prefabricated triangular frames of connected members, engineered as one unit.
Purpose	Support roof covering and transfer loads directly to exterior walls.	Support roof loads and span open spaces without interior load-bearing walls.
Core Mechanism	Each rafter acts as an independent beam resisting bending and shear.	Triangular geometry converts loads into tension and compression in members.
Structural Action	Transfers vertical load through bending stress along each sloping member.	Distributes forces through axial tension and compression within triangulated web.
Load Path	Loads travel from sheathing to rafters, then down to bearing walls.	Loads travel from top chord to web members, then to bearing points.
Span Capability	Typically spans 12 to 20 feet before requiring intermediate support.	Can span 30 to 60 feet or more with no interior columns.
Material Volume	Uses more lumber per square foot due to solid beam sections.	Uses less lumber because triangulated members are smaller and spaced wider.
Weight	Heavier roof assembly because of larger solid timber sections.	Lighter overall structure due to smaller members and open web design.
On-Site Labor	Requires skilled carpenters to cut, fit, and fasten each piece.	Requires crane placement and bolting of pre-built units only.
Installation Speed	Slower erection, often taking several days for a standard home.	Much faster, with a whole roof set in one to two days.
Fabrication Location	Cut and assembled on-site using raw lumber and nails.	Manufactured in a factory with precision jigs and connectors.
Design Flexibility	Allows custom angles, cathedral ceilings, and unique rooflines.	Limited to engineered shapes; complex designs require special engineering.
Attic Space	Leaves open interior volume usable for living space or storage.	Web members block usable space, limiting attic conversion options.
Ventilation	Open bays allow natural airflow along the entire roof slope.	Webs restrict airflow; requires baffles and chutes for proper circulation.
Insulation Placement	Insulation fits neatly between full-depth rafters with no obstructions.	Insulation must navigate around web members, creating potential gaps.
Material Cost	Higher lumber volume typically raises total material expenditure.	Lower material cost per square foot because of reduced lumber usage.
Labor Cost	Higher skilled labor cost due to extensive on-site carpentry work.	Lower labor cost because factory assembly reduces field installation hours.
Overall Cost	Usually more expensive for simple roofs due to labor and material.	Typically 15-30% cheaper for standard residential roof spans.
Structural Accuracy	Prone to human error in cutting angles and aligning members.	Factory precision ensures consistent angles and exact member lengths.
Quality Control	Quality depends on individual carpenter skill and site conditions.	Manufactured under controlled conditions with consistent inspection standards.
Durability	Solid timber resists moisture damage well when properly detailed.	Thinner members may be more susceptible to rot if exposed.
Long-Term Performance	Performs reliably for decades with minimal structural movement over time.	Performs well but can suffer from joint loosening in extreme weather.
Maintenance	Individual members can be replaced easily if damaged or rotted.	Replacing one damaged member requires careful cutting and re-bracing.
Fire Resistance	Larger timber sections char slowly, offering longer fire resistance.	Thinner members fail faster in fire, though treatments improve performance.
Seismic Performance	Heavier mass increases seismic forces but provides ductile load paths.	Lighter weight reduces seismic demand; connections must resist racking.
Wind Resistance	Requires hurricane ties and clips to resist uplift at connections.	Engineered connectors provide strong uplift resistance when properly specified.
Compatibility	Works easily with any roof pitch, overhang, or architectural detail.	Best suited to standard pitches and simple rectangular roof layouts.
Availability	Raw lumber is widely available at any local building supply yard.	Requires ordering from specialized truss manufacturers with lead times.
Typical Users	Custom home builders and architects designing unique roof forms.	Production builders and developers seeking speed and cost efficiency.
Best-Fit Scenario	Choose for cathedral ceilings, living attics, or complex rooflines.	Choose for simple spans, tract homes, and budget-driven projects.

What Is Rafters?

Rafters are the sloping structural beams that form the skeleton of a pitched roof. They run from the ridge at the top down to the wall plates at the bottom. Rafters support the roof deck and transfer the weight of the roof to the exterior walls.

Definition of Rafters

Rafters are individual, parallel structural members installed on an incline to support the roof covering. They are typically spaced at regular intervals, such as 16 or 24 inches on center, and they define the pitch of the roof. They carry vertical loads like snow and wind directly to the bearing walls.

Key Characteristics of Rafters

Characteristic	What It Means in Practice
Sloped Orientation	Each rafter is angled to create the roof's pitch, directing water and snow off the structure.
Individual Members	Each rafter is a separate piece, so a single failure does not automatically collapse the entire roof.
On-Site Assembly	Rafters are cut and installed piece-by-piece by carpenters directly on the job site.
Open Attic Space	Because they are spaced apart, they leave the attic area largely open for storage or future finishing.
Field Cutting	They can be cut and adjusted on-site to accommodate unusual roof shapes or custom designs.
Load Path	They transfer roof loads straight down to the top of the exterior bearing walls, not to interior points.
Birdsmouth Cut	A notch at the bottom allows the rafter to sit flush and securely on the top of the wall plate.
Ridge Connection	The top ends meet at a central ridge board, which helps align them and provides lateral stability.
Material Flexibility	They can be made from dimensional lumber, engineered wood, or steel, offering design freedom.
Higher Material Use	They generally require more wood per square foot of roof than a comparable truss system.

Common Examples of Rafters

Common Rafters - The standard sloping members that run from the ridge to the wall plate on a simple gable roof.
Hip Rafters - The diagonal member at the external corner where two roof slopes meet, forming the hip line.
Valley Rafters - The diagonal member at an internal intersection where two sloping roofs join to channel water.
Jack Rafters - Shortened rafters that connect from a hip or valley rafter down to the wall plate, not reaching the ridge.
Flying Rafters - Rafters that extend beyond the exterior wall to create an overhang or eave without a supporting wall below.
Collar Tie Rafters - A pair of rafters connected by a horizontal tie near the ridge to prevent spreading under heavy snow loads.
Cathedral Ceiling Rafters - Exposed rafters that form a high, open ceiling, often finished with wood for a dramatic interior look.
Historic Timber Rafters - Large, hand-hewn oak members used in medieval buildings and barns, visible from the interior.
Pole Barn Rafters - Simple, widely spaced rafters resting on top of vertical poles, common in agricultural structures.
Gambrel Roof Rafters - Rafters with two distinct slopes on each side, creating a barn-like shape with extra headroom.

Advantages and Limitations of Rafters

Advantages	Limitations
Create open and usable attic space	Require skilled carpenters for accurate cutting and fitting
Allow for custom and complex roof designs	Use significantly more lumber, increasing material cost
Simple to modify or repair on site	Installation is slower, increasing labor time and cost
Provide natural ventilation through open spaces	Offer less structural rigidity against strong lateral wind forces
Easier to inspect for rot or insect damage	Long spans require heavy beams or intermediate support walls
Permit easy future attic conversion	Prone to shrinkage and warping of individual wood pieces
No need for heavy lifting equipment	Prone to spreading at the walls without proper collar ties
Ideal for small or irregular roof footprints	Harder to insulate effectively due to irregular shapes
Offer a classic, traditional aesthetic	More prone to on-site errors and measurement mistakes
Allow for phased construction of the roof	Provide less predictable structural performance than factory-built systems

What Is Trusses?

Trusses are prefabricated triangular frameworks of connected members that distribute roof or floor loads evenly to supports. They exist to span large distances without interior columns, using minimal material. Engineers design them for structural efficiency, making them a standard choice in modern residential and commercial construction projects.

Definition of Trusses

A truss is an engineered load-bearing assembly of straight members arranged in interconnected triangles, where joints act as pinned connections transferring axial forces—tension or compression—along each element. This geometric configuration provides inherent rigidity and stability, allowing the framework to carry substantial loads over long spans while minimizing overall weight and material consumption.

Key Characteristics of Trusses

Characteristic	What It Means in Practice
Triangulation	Every panel forms a triangle, preventing deformation under load and giving the structure its inherent stiffness.
Pinned joints	Connections allow slight rotation, simplifying force calculations and reducing bending stress on individual members.
Axial loading	Members primarily carry tension or compression, not bending, which maximizes the strength of each piece of lumber or steel.
Long-span capability	Trusses can clear 30 to 60 feet or more without intermediate supports, enabling open floor plans and large roofs.
Prefabrication	Factory-built with metal connector plates, trusses arrive on-site ready for rapid installation, reducing labor time significantly.
Lightweight design	Open web construction uses less material than solid beams, lowering transportation costs and easing crane placement.
Load path efficiency	Forces travel directly from top chord to bottom chord to bearing points, eliminating wasteful material in non-load areas.
Versatile profiles	Shapes include gable, hip, scissors, and flat configurations, adapting to varied architectural styles and roof pitches.
Consistent quality	Computer-aided manufacturing ensures each truss matches engineering specifications, reducing on-site errors and field modifications.
Spacing flexibility	Trusses can be set at 12, 16, or 24 inches on center, accommodating different decking materials and load requirements.

Common Examples of Trusses

King post truss – A single central vertical post supporting a ridge beam, ideal for short spans up to 16 feet in simple roofs.
Queen post truss – Two vertical posts create a wider clear span, typically used for 20 to 35 foot roof openings.
Fink truss – A W-shaped web pattern that efficiently distributes loads, making it the most common residential roof truss in the United States.
Howe truss – Diagonal members slope toward the center under compression, suited for heavy loads on bridges and industrial roofs.
Pratt truss – Vertical members handle compression while diagonals carry tension, optimal for steel bridges and long-span floors.
Warren truss – Equilateral triangles alternate compression and tension, providing a clean aesthetic for pedestrian bridges and roof decks.
Scissor truss – Angled bottom chords create a vaulted ceiling, offering architectural drama in living rooms and cathedrals.
Attic truss – A raised center section forms a room or storage space, maximizing usable square footage within the roof envelope.
Hip truss – Sloped ends meet at a ridge, forming a pyramid-like roof that sheds wind and rain effectively in all directions.
Mono truss – A single-sloped triangular frame used for sheds, carports, and lean-to additions where one side is higher.

Advantages and Limitations of Trusses

Advantages	Limitations
Spans long distances without interior walls, enabling open-concept layouts and flexible interior design.	Requires careful crane or manual handling during installation, adding equipment costs and site coordination complexity.
Uses up to 30% less lumber than traditional stick framing, reducing material expenses and forestry impact.	Prefabricated dimensions are fixed, so last-minute design changes require costly re-engineering or full replacement.
Factory fabrication ensures precise angles and cuts, minimizing waste and accelerating on-site assembly time.	Attic storage and future HVAC modifications are severely restricted by the web members blocking access.
Engineered load paths eliminate guesswork, providing predictable structural performance under snow, wind, and seismic forces.	Moisture exposure at metal connector plates can cause corrosion, weakening joints over time if leaks are not repaired.
Lightweight components reduce dead load on foundations and walls, potentially lowering foundation construction costs.	Fire resistance is limited because thin lumber members burn quickly, requiring additional sprinklers or drywall protection.
Versatile shapes accommodate complex roof geometries, including vaults, hips, and dormers, with minimal custom framing.	Transportation of long trusses exceeds legal truck lengths, necessitating special permits and route planning.
Consistent quality control in manufacturing reduces human error, producing uniform members that meet code requirements.	On-site storage space is needed for stacked trusses, which can be damaged by wind or improper stacking before installation.
Rapid installation—a typical residential roof can be set in one day—shortens construction schedules and labor costs.	Web members create a maze that complicates electrical, plumbing, and ductwork routing, increasing mechanical installation effort.
Lower overall weight than solid beams reduces seismic inertia, improving performance in earthquake-prone regions.	Repairing a damaged truss is complex; cutting any member compromises the entire structural integrity and requires professional assessment.
Economical for repetitive designs, as mass production drives down per-unit costs for tract housing and commercial buildings.	Maximum spans are limited by material strength; beyond 100 feet, trusses become heavy and uneconomical compared to steel girders.

Similarities Between Rafters and Trusses

Shared Aspect	How Rafters and Trusses Are Alike
Core Purpose	Rafters and trusses both support the roof deck and transfer its weight to the walls.
Structural Category	Rafters and trusses are both classified as roof-framing members in residential and light commercial construction.
Primary Material	Rafters and trusses are both most often fabricated from dimensional lumber or engineered wood products.
Load Input	Rafters and trusses both carry dead loads from roofing materials and live loads from snow and wind.
Load Transfer	Rafters and trusses both direct roof loads downward to bearing walls or support beams.
Design Goal	Rafters and trusses both aim to create a stable, rigid roof plane that resists deflection.
Slope Support	Rafters and trusses both establish the roof's pitch and provide a nailing surface for sheathing.
Building Code	Rafters and trusses both must comply with the same local and international residential building codes.
Engineering Input	Rafters and trusses both require structural calculations to confirm span and spacing are safe.
Installation Crew	Rafters and trusses are both typically installed by professional carpenters or roof framing crews.
On-Site Tools	Rafters and trusses both require similar tools such as hammers, nail guns, and levels for placement.
Fastening Method	Rafters and trusses both rely on metal connectors, nails, or screws to secure them to the wall top plate.
Spacing Rules	Rafters and trusses both use standard center-to-center spacing like 16 or 24 inches on center.
Material Grade	Rafters and trusses both depend on lumber grade and moisture content for long-term strength.
Weather Exposure	Rafters and trusses both must withstand the same local climate conditions including rain and heat.
Sheathing Base	Rafters and trusses both provide the top chord or top edge onto which roof decking is fastened.
Insulation Cavity	Rafters and trusses both create a space between members that can hold roof insulation.
Ventilation Need	Rafters and trusses both require proper attic airflow to prevent moisture buildup and rot.
Fire Resistance	Rafters and trusses both share similar fire-resistance ratings because they are made of wood.
Termite Risk	Rafters and trusses both are vulnerable to wood-destroying insects if left unprotected.
Rot Risk	Rafters and trusses both face decay risk when exposed to chronic leaks or poor ventilation.
Inspection Point	Rafters and trusses both are inspected by building officials before roof sheathing is installed.
Quality Control	Rafters and trusses both undergo visual grading or factory checks to ensure dimensional accuracy.
Cost Driver	Rafters and trusses both have total cost driven mainly by lumber prices and local labor rates.
Repair Method	Rafters and trusses both can be repaired by sistering new lumber alongside a damaged member.
Maintenance Need	Rafters and trusses both require periodic checks for cracks, sagging, or fastener corrosion.
Longevity Span	Rafters and trusses both can last 50 years or more when kept dry and structurally sound.
Failure Mode	Rafters and trusses both typically fail by bending, splitting, or connection pull-out under overload.
Replacement Scope	Rafters and trusses both are difficult to replace individually after the roof finish is installed.
Design Flexibility	Rafters and trusses both can be customized in size and shape to fit a building's specific roof layout.

Rafters or Trusses: Which Should You Choose?

The decision comes down to available time and labor cost. If skilled carpenters are on site and you value cathedral ceilings or attic storage, choose Rafters. If you need a fast, budget-friendly roof and want simple open floor plans, choose Trusses. Trusses win for most new residential construction.

When to Use Rafters

Choose Rafters when you need cathedral ceilings, attic living space, or complex rooflines. They fit smaller structures like sheds and garages, and suit projects with plenty of build time and skilled labor. Rafters allow custom on-site adjustments and are ideal for renovations where the existing roof pitch must be matched exactly.

When to Use Trusses

Choose Trusses when you want fast installation, lower material cost, and clear spans over 30 feet. They work best for simple gable roofs on residential builds where attic storage is not a priority. Trusses are pre-engineered in a factory, so they suit tight budgets and strict construction timelines where weather delays threaten the schedule.

Common Misconceptions About Rafters and Trusses

Common Myth	The Reality
Rafters and trusses are basically the same thing with different names.	Rafters are individual sloping beams, while trusses are pre-engineered triangular frames made of multiple connected members.
Trusses are always stronger than rafters for every roof design.	Rafters can handle heavy point loads better than trusses, making them superior for specific load-bearing scenarios.
You can easily convert a truss roof into a finished attic space.	Trusses use internal web members that block attic space, so converting them requires costly structural engineering modifications.
Rafters are cheaper to install than trusses on any project.	Trusses cost less to install on most projects because they arrive prefabricated and require less on-site labor and skill.
Trusses cannot support solar panels or heavy roof-mounted equipment.	Trusses can support solar panels, but only if the installation points align with specific engineered node locations.
Rafter roofs always leak more than truss roofs because they have fewer supports.	Leakage depends on installation quality and flashing, not on whether the roof uses rafters or trusses.
All trusses look identical, so any truss works for any house.	Trusses are custom-engineered per building, with different profiles, spans, and load ratings for each unique design.
Rafters are outdated and no modern homes use them anymore.	Rafters remain common in custom homes, cathedral ceilings, and renovations where trusses cannot fit the design.
Trusses are made only from wood, so they rot quickly in humid climates.	Trusses are also made from steel, and wood trusses receive pressure treatment or coatings for moisture resistance.
You can cut truss webs or chords to run ductwork without any problems.	Cutting any part of a truss compromises its structural integrity and can cause catastrophic roof failure.
Rafter roofs cannot span long distances without intermediate support walls.	Rafters can span long distances when sized correctly with larger lumber or engineered wood products like LVLs.
Trusses are always prefabricated off-site, never built on location.	Contractors can build trusses on-site using truss plates, though factory-built trusses are more common and precise.
Rafters provide zero attic storage space because they block the interior.	Rafters actually leave the attic open and clear, offering more usable storage space than trusses provide.
Trusses are environmentally unfriendly because they waste large amounts of lumber.	Trusses use less lumber than rafters for equivalent spans because engineered members maximize material efficiency.
Rafter roofs are always steeper than truss roofs by design.	Both rafters and trusses can be built at any pitch, from low-slope commercial designs to steep residential styles.
Trusses cannot be modified later to add skylights or dormers.	Skylights and dormers can be added to truss roofs, but only with engineered reinforcement around the openings.
Rafters require no engineering because they are simple, traditional framing.	Rafters still require structural calculations for sizing, spacing, and connections to meet local building codes.
Trusses are too heavy for a small crew to lift into place.	Trusses are lightweight relative to their strength, and small crews can lift them with cranes or manual labor.
Rafter roofs cannot accommodate vaulted ceilings without losing structural support.	Rafters are ideal for vaulted ceilings because they expose the ceiling line while providing the necessary roof support.
Trusses fail suddenly without warning signs, making them unsafe for homes.	Trusses show warning signs like sagging, cracking, or nail popping, and engineered trusses rarely fail without visible distress.
Rafters are always visible from inside, ruining the finished ceiling appearance.	Rafters are hidden behind drywall or ceiling finishes unless you specifically choose exposed rafter-tail designs.
Trusses cannot be used for curved or uniquely shaped roof designs.	Trusses can be engineered for curves, hips, valleys, and complex geometries using specialized truss configurations.
Rafter installation is faster than truss installation because it uses simpler parts.	Truss installation is faster because each truss is one piece, while rafters require cutting and fitting each individual member.
Trusses are only suitable for simple rectangular or gable roof shapes.	Trusses adapt to hip roofs, gambrel roofs, and complex floor plans with engineered multi-piece truss assemblies.
Rafters cannot be used for flat or low-slope roofs because they lack strength.	Rafters work fine on flat roofs when properly sized and supported, though drainage and deflection require careful design.
Trusses are always more expensive than rafters when you compare material costs.	Trusses cost less than rafters in total project cost because they reduce labor, waste, and on-site construction time.
Rafter roofs cannot be insulated effectively because of exposed framing gaps.	Rafter roofs insulate well with batt, spray foam, or rigid board insulation installed between and over the rafters.
Trusses are not code-compliant for hurricane or high-wind regions.	Trusses are code-compliant in high-wind areas when engineered with proper connections, bracing, and tie-downs.
Rafters and trusses cannot be combined in the same roof structure.	Hybrid roofs mix rafters and trusses, with rafters for vaulted sections and trusses for standard spans in one building.
Choosing rafters always gives you a better quality roof than choosing trusses.	Quality depends on engineering, materials, and installation, not the framing type, so both rafters and trusses perform well.

Conclusion

Difference Between Rafters and Trusses comes down to structure and cost. Rafters offer design flexibility and attic space, while trusses provide superior strength and affordability. Choose rafters for custom roofs or livable attics. Choose trusses for clear spans, speed, and budget-conscious projects.

FAQs on Difference Between Rafters and Trusses

What is the main difference between rafters and trusses?: Rafters are individual sloping beams installed one at a time, while trusses are pre-engineered triangular frames that combine multiple members into a single structural unit.
Are trusses stronger than rafters?: Yes, trusses are generally stronger because their triangular geometry distributes loads efficiently across multiple members, allowing them to span longer distances without intermediate support.
Which is cheaper to install, rafters or trusses?: Trusses are typically cheaper to install because they arrive prefabricated and require less on-site labor, whereas rafters demand more skilled carpentry time and material cutting.
What are the safety risks of cutting a roof truss?: Cutting a roof truss is dangerous because it can compromise the engineered load path, potentially causing structural failure or roof collapse under snow, wind, or live loads.
Can rafters be used in a house designed for trusses?: Yes, rafters can replace trusses only if a structural engineer verifies the wall thickness, ceiling height, and load-bearing capacity, since rafters require different support spacing and ridge beams.
What is a common beginner mistake when building with rafters?: A common beginner mistake is cutting birdsmouth joints too deep, which weakens the rafter and reduces its load-carrying capacity at the critical wall connection point.
Are rafters and trusses interchangeable for attic space?: No, they are not interchangeable because trusses typically use web members that block usable attic space, while rafter systems leave open areas that are easier to finish into rooms.
Can I switch from trusses to rafters during a renovation?: Yes, you can switch from trusses to rafters during renovation, but you must add a structural ridge beam and temporary shoring while removing each truss to prevent roof sagging.
Which is better for a cathedral ceiling, rafters or trusses?: Rafters are better for cathedral ceilings because they allow an open, uninterrupted interior space, whereas trusses require exposed webs or complex modifications that reduce the visual ceiling height.
What is the real-world use case where rafters are preferred over trusses?: Rafters are preferred for custom homes with complex roof shapes, such as hips, valleys, and dormers, where prefabricated trusses cannot match the unique geometry without costly custom engineering.