SDI Member · ANSI/SDI compliant
Steel purlin supplier in Miami
High-strength C & Z steel purlins in Miami for efficient roof and wall support.
Supplying Steel Purlins in Miami
General contractors and steel erectors in Miami rely on Miami Metal Deck for Steel Purlins on projects across Miami-Dade County and the South Florida region. Miami is close to our Miami Gardens facility, so stock items are available for same-day pickup and same-day delivery within South Florida.
Salt air and humidity near the coast in Miami favor heavier zinc coatings such as G90 galvanized. We match the finish to what your drawings call for. Miami-Dade County falls within the Florida Building Code's High-Velocity Hurricane Zone (HVHZ). Send us the deck and attachment requirements on your drawings so we can supply the specified gauge and lengths.
Product guide
Product specifications for your Miami project
Compare profiles, dimensions, material options and applications to prepare your order. Select a product below to explore its technical details.
C Purlin
Roof and wall applications commonly use C purlin because it is both strong and light. This C-shaped section comes in depths and gauges from 12 GA to 20 GA, follows ANSI standards, and is finished with G60 or G90 galvanizing.
Dimensions and profile
| Property | Dimension |
|---|---|
| Commercial Name | C Purlin |
| Gauge | 12 to 20 |
| Thickness | 0.039" to 0.094" |
| Weights | 1.2 to 6.78 lbs/ft |
| Size Range | C4x2 to C12x3 |
| Web Depths | 4 to 12 inches |
| Flanges | 2 to 3 inches |
C purlins span from C4x2 up to C12x3, with web depths between 4 and 12 inches. Gauges 12 to 20 correspond to thicknesses of 0.039" to 0.094" and weights from 1.2 to 6.78 lbs/ft. Flanges measure 2 to 3 inches, with lips up to 0.787 inches.
Sizes, thicknesses and weights
| Purlin Size | Thickness | Weight (lbs/ft) | Gauge | Web | Flange | Lip |
|---|---|---|---|---|---|---|
| C12x3-12 | 0.094 | 6.78 | 12 | 12 | 3 | 0.787 |
| C12x3-14 | 0.075 | 5.4 | 14 | 12 | 3 | 0.787 |
| C10x3-12 | 0.094 | 5.48 | 12 | 10 | 3 | 0.787 |
| C10x3-14 | 0.075 | 4.37 | 14 | 10 | 3 | 0.709 |
| C8x3-12 | 0.094 | 4.87 | 12 | 8 | 3 | 0.787 |
| C8x3-14 | 0.075 | 3.86 | 14 | 8 | 3 | 0.709 |
| C8x3-16 | 0.059 | 3.02 | 16 | 8 | 3 | 0.591 |
| C6x2.5-12 | 0.094 | 3.83 | 12 | 6 | 2.5 | 0.709 |
| C6x2.5-14 | 0.075 | 3.03 | 14 | 6 | 2.5 | 0.669 |
| C6x2.5-16 | 0.059 | 2.41 | 16 | 6 | 2.5 | 0.630 |
| C6x2.5-18 | 0.047 | 1.94 | 18 | 6 | 2.5 | 0.591 |
| C5x2-12 | 0.094 | 3.19 | 12 | 5 | 2 | 0.630 |
| C5x2-14 | 0.075 | 2.5 | 14 | 5 | 2 | 0.630 |
| C5x2-16 | 0.059 | 1.99 | 16 | 5 | 2 | 0.591 |
| C5x2-18 | 0.047 | 1.59 | 18 | 5 | 2 | 0.591 |
| C5x2-20 | 0.039 | 1.35 | 20 | 5 | 2 | 0.591 |
| C4x2-20 | 0.039 | 1.20 | 20 | 4 | 2 | 0.472 |
| C4x2-18 | 0.047 | 1.41 | 18 | 4 | 2 | 0.472 |
| C4x2-16 | 0.059 | 1.76 | 16 | 4 | 2 | 0.512 |
| C4x2-14 | 0.075 | 2.21 | 14 | 4 | 2 | 0.512 |
| C4x2-12 | 0.094 | 2.82 | 12 | 4 | 2 | 0.512 |
Gauges and thicknesses
| Gauge | Bare steel thickness (in) | Weight (lbs/ft) | Typical applications |
|---|---|---|---|
| 12 | 0.094 | Up to 6.78 lbs/ft | Heavy structural applications, large spans. |
| 14 | 0.075 | Up to 5.4 lbs/ft | Standard commercial structural support. |
| 16 | 0.059 | Up to 3.02 lbs/ft | Medium-duty roof and wall support. |
| 18 | 0.047 | Up to 1.94 lbs/ft | Light-duty applications. |
| 20 | 0.039 | Up to 1.35 lbs/ft | Light framing and small spans. |
Gauges 12 through 20 let you match the purlin to the load and span. The heavier gauges (12 and 14) suit large structural applications and heavy roofing loads, while 18 and 20 gauge fit lighter framing and short spans where weight and cost matter most.
Finishes and coatings
| Finish | Details |
|---|---|
| Galvanized G60 | Zinc coating of 0.6 oz/ft². Recommended for general environments. |
| Galvanized G90 | Zinc coating of 0.9 oz/ft². Ideal for highly corrosive environments. |
| Prime-Painted | Provides a base coat for additional protection or paint adhesion. |
| Bare Steel | Unfinished; typically for indoor use or controlled environments. |
C purlins are supplied galvanized (G60 and G90) or prime-painted. G60 protects against corrosion in general environments, and G90 has a thicker zinc layer for coastal or high-humidity work. The prime-painted option supplies a base coat when additional coatings will follow.
Material and finish options
Our C purlins are rolled from high-strength 55 KSI steel. Pick a corrosion-resistant galvanized finish that meets ANSI standards, a painted option when appearance matters, or bare steel for custom applications. Every finish is meant to extend durability and performance.
Custom lengths
We cut to the length your job calls for, from 6′-0″ on smaller projects to 40′-0″ spans on larger builds. Custom lengths for Miami projects help the pieces fit properly and keep waste low.
C Purlin features
With a high strength-to-weight ratio, quick installation, and corrosion-resistant coatings, our C purlins fit industrial buildings, solar panels, agricultural structures, and commercial roof and wall systems. They are a practical pick for Miami projects.
High Strength-to-Weight Ratio
Strong load-bearing performance in a light section means less dead load on the structure and easier installation.
Easy and Fast Installation
Because the section is light and symmetrical, crews spend less time and face fewer complications in roof and wall systems.
Galvanized or Prime-Painted Finish
G60 and G90 galvanized finishes, along with prime-painted, improve durability and corrosion resistance.
Ideal for Custom Applications
Fits industrial buildings, solar panels, agricultural structures, and a variety of other commercial structures.
Compliance with SDI Standards
Steel Deck Institute and ANSI guidelines are met, supporting quality and code compliance.
Versatile Design Options
Choose from C4x2 to C12x3 sizes in gauges 12 to 20 to suit different structural needs and load requirements.
Installation and connections
Installation practices
- C purlins should be installed perpendicular to the primary structural supports.
- Anchor them at every support by bolt, weld, or self-drilling screw.
- Purlins that overlap are secured with bolts or screws at 12" o.c.
Fasteners and attachments
- Connect to primary frames with ½" diameter bolts.
- Fasten along supports with #12 self-drilling screws at 6" o.c., and at overlaps with the same screws at 12" o.c.
- Secure overlapping joints using #12 self-drilling screws at 12" o.c.
Confirm the profile, gauge, span, loads and connections against your project drawings and the applicable product load tables before ordering.
Applications
Roof and Wall Structural Framing
Commercial and industrial buildings use C purlins as solid support for roofing and wall cladding, in vented and non-vented structures alike.
Mezzanine and Racking Support
Strong enough for mezzanine floors and industrial racking, they are a dependable option for warehouses and factories.
Standards and product documentation
Design and performance of the C purlin follow SDI (Steel Deck Institute) specifications, held to a high standard.
C Purlin questions
What is a C purlin, and what is it used for?
It is a cold-formed steel member with a 'C' shaped section. Its main job is structural support in the roofs and walls of industrial, commercial, and agricultural buildings.
How does a C purlin differ from a Z purlin?
The C purlin has a symmetrical 'C' section that gives strength and stability, and it works best in simple-span applications. A Z purlin has a 'Z' section that lets pieces overlap, which adds rigidity on longer continuous spans.
Which gauges and materials do C purlins come in?
Gauges 12 to 20 are available. They are made from galvanized steel (G60/G90) or prime-painted steel, depending on what the project requires.
What are the benefits of C purlins in Miami?
They offer high structural strength in a light profile, quick installation thanks to a standardized design, and flexibility across building types. Galvanizing adds corrosion resistance, and durability keeps maintenance and cost down.
Are custom C purlins available?
Yes. We make custom C purlins to order, with length (6' to 40'), gauge, and finish set to your project specifications.
Z Purlin
For roof and wall applications, Z purlin offers superior load-bearing capacity, and its overlapping design carries longer spans. Gauges 12–18 are available, the product meets ANSI standards, and G60 and G90 galvanized finishes are offered.
Dimensions and profile
| Property | Dimension |
|---|---|
| Commercial Name | Z Purlin |
| Gauge | 12 to 18 |
| Thickness | 0.047" to 0.094" |
| Weights | 1.94 to 6.78 lbs/ft |
| Size Range | Z6x2.5 to Z12x3 |
| Web Depths | 6 to 12 inches |
| Flanges | 2.5 to 3 inches |
Z purlins cover Z6x2.5 to Z12x3, with web depths of 6 to 12 inches. Gauges 12 through 18 (thickness 0.047" to 0.094") carry weights of 1.94 to 6.78 lbs/ft. Flanges are 2.5 to 3 inches, and lips reach 0.787 inches.
Sizes, thicknesses and weights
| Purlin Size | Thickness | Weight (lbs/ft) | Gauge | Web | Flange | Lip |
|---|---|---|---|---|---|---|
| Z12x3-12 | 0.094 | 6.78 | 12 | 12 | 3 | 0.787 |
| Z12x3-14 | 0.075 | 5.4 | 14 | 12 | 3 | 0.787 |
| Z10x3-12 | 0.094 | 5.48 | 12 | 10 | 3 | 0.787 |
| Z10x3-14 | 0.075 | 4.37 | 14 | 10 | 3 | 0.709 |
| Z8x3-12 | 0.094 | 4.87 | 12 | 8 | 3 | 0.787 |
| Z8x3-14 | 0.075 | 3.86 | 14 | 8 | 3 | 0.709 |
| Z8x3-16 | 0.059 | 3.02 | 16 | 8 | 3 | 0.591 |
| Z6x2.5-12 | 0.094 | 3.83 | 12 | 6 | 2.5 | 0.709 |
| Z6x2.5-14 | 0.075 | 3.03 | 14 | 6 | 2.5 | 0.669 |
| Z6x2.5-16 | 0.059 | 2.41 | 16 | 6 | 2.5 | 0.630 |
| Z6x2.5-18 | 0.047 | 1.94 | 18 | 6 | 2.5 | 0.591 |
Gauges and thicknesses
| Gauge | Bare steel thickness (in) | Weight (lbs/ft) | Typical applications |
|---|---|---|---|
| 12 | 0.094 | Up to 6.78 lbs/ft | Heavy structural applications, large spans. |
| 14 | 0.075 | Up to 5.4 lbs/ft | Standard commercial structural support. |
| 16 | 0.059 | Up to 3.02 lbs/ft | Medium-duty roof and wall support. |
| 18 | 0.047 | Up to 1.94 lbs/ft | Light-duty applications and agricultural buildings. |
Gauges 12 through 18 allow you to match load and span needs. Use the heavier gauges (12 and 14) for large structural applications. Gauges 16 and 18 are for medium to light-duty work in commercial and agricultural structures.
Finishes and coatings
| Finish | Details |
|---|---|
| Galvanized G60 | Zinc coating of 0.6 oz/ft². Recommended for general environments. |
| Galvanized G90 | Zinc coating of 0.9 oz/ft². Ideal for highly corrosive environments. |
| Prime-Painted | Provides a base coat for additional protection or paint adhesion. |
| Bare Steel | Unfinished; typically for indoor use or controlled environments. |
Z purlins are offered galvanized (G60 and G90) and prime-painted. G60 resists corrosion in general environments, while G90 has a heavier zinc coating for coastal or high-humidity use. The prime-painted finish adds a protective base coat when more coatings are planned.
Material and finish options
Our Z purlins are made from high-strength 55 KSI steel. Options include corrosion-resistant galvanized finishes meeting ANSI standards, painted finishes for tailored aesthetics, and bare steel for custom applications. Each finish helps durability and performance.
Custom lengths
Lengths run from 6′-0″ for smaller projects to as much as 40′-0″ for larger construction, and we cut every one precisely and efficiently. Custom lengths give an optimal fit with minimal waste for Miami contractors.
Z Purlin features
Superior load-bearing capacity, an overlapping design for extended spans, and corrosion-resistant finishes define our Z purlins. They work well in large-scale commercial, industrial, and agricultural roofing and wall systems.
Superior Load-Bearing Capacity
Handles higher structural loads, and the overlapping design delivers continuous-span structural efficiency.
Overlapping for Extended Spans
At intermediate supports, Z purlins overlap and interlock to form continuous-beam behavior, giving greater efficiency across longer distances.
Corrosion-Resistant Finishes
Choose G60 or G90 galvanized, or prime-painted, for excellent durability in harsh environmental conditions.
Cost-Effective
Material and labor costs drop on large roofing and wall systems because spans are longer and intermediate supports fewer.
Compliance with SDI Standards
Quality and code compliance come from meeting Steel Deck Institute and ANSI guidelines.
Versatile Applications
With sizes from Z6x2.5 to Z12x3 and gauges 12–18, Z purlins serve commercial, industrial, and agricultural structural applications.
Installation and connections
Installation practices
- Install Z Purlins perpendicular to the primary structural supports.
- Anchor at each support using bolts, welds, or self-drilling screws.
- Overlap and interlock purlins at intermediate supports, secured at 12" o.c.
Fasteners and attachments
- Connect to primary frames with ½" diameter bolts.
- Fasten along supports with #12 self-drilling screws at 6" o.c., and at overlaps with the same screws at 12" o.c.
- Secure overlapping joints using #12 self-drilling screws at 12" o.c.
Confirm the profile, gauge, span, loads and connections against your project drawings and the applicable product load tables before ordering.
Applications
Long-Span Roofing Systems
Roofing on large commercial and industrial buildings gains from continuous spans and fewer intermediate supports. Overlapping maximizes structural efficiency across long roof runs.
Continuous Wall Cladding Support
Z purlins act as continuous wall girts behind metal cladding in industrial, commercial, and agricultural buildings. The interlocking profile gives superior lateral stability.
Standards and product documentation
Compliance with SDI (Steel Deck Institute) specifications means the Z purlin meets high standards of design and performance.
Z Purlin questions
What is a Z purlin?
A Z purlin is a cold-formed steel structural member whose section resembles the letter 'Z'. It is used chiefly as roof purlins and wall girts in commercial, industrial, and agricultural metal building systems.
How are Z purlins better than C purlins?
Overlapping and interlocking at intermediate supports gives Z purlins continuous-beam behavior. Over longer spans, this brings greater structural efficiency and load capacity than simple-span C purlins.
What are the available sizes and gauges for Z purlins?
Sizes go from Z6x2.5 to Z12x3, in gauges 12 through 18. Web depths are 6 to 12 inches, and flanges are 2.5 to 3 inches.
What finish options exist for Z purlins?
You can choose G60 or G90 galvanized finishes for corrosion resistance, or prime-painted finishes for projects requiring additional coatings.
Can Miami projects get customized Z purlins?
Yes. Custom Z purlins are offered with length (6' to 40'), gauge, and finish tailored to specific project specifications.
Planning your order
Steel Purlins supply for Miami
Send your project drawings or material list so our team can review quantities, profile requirements and cut lengths. We can help with takeoffs and shop drawings, then confirm pricing and delivery options for your Miami project.
Send your drawings for a quoteWhat to include in your quote request
- The profile, gauge and finish shown in your specifications.
- Quantities and lengths, or the drawings we can take them off from.
- The Miami job site address, your target delivery date and any access limits.
- Load tables, attachment details or other documents your engineer specified.
How We Work
We Guide You Through the Process
From manufacturing to delivery, we ensure precision, efficiency, and compliance with industry standards.
Takeoff and Shop Drawings Services
We provide specialized takeoff services for accurate quotations and detailed shop drawings to produce optimized cutting lists for sheets, ensuring efficient execution and waste-free outcomes in your projects.
Manufacture
We manufacture metal decks to SDI and ANSI standards, ensuring strength, durability, and compliance. We provide custom lengths and high-precision fabrication for optimized performance in roof, floor, and form deck applications.
Swift Deliveries & Nationwide Reach
While based in South Florida, we serve clients nationwide, ensuring quality, efficiency, and timely deliveries across the U.S., reflecting our commitment to excellence without boundaries.
Frequently Asked Questions
Do you supply steel purlins in Miami?
Yes. We deliver C and Z purlins to Miami with 1-day delivery available. Contact us at 305-760-2575.
What is the difference between C and Z purlins?
Z purlins overlap and interlock at supports for continuous-span efficiency. C purlins suit simple-span applications where continuity is not required.
What is the function of a steel purlin?
A steel purlin supports roof and wall sheeting. It transfers loads from the cladding to the main structural frame and runs horizontally across the rafters or columns of the building.
Which purlin types do most buildings use?
Most use C or Z Purlins. C Purlins are chosen for simple, non-overlapping spans. Z Purlins overlap and interlock to form continuous spans, giving better structural efficiency over long distances.
What distinguishes a C Purlin from a Z Purlin?
At intermediate supports, Z purlins can overlap and interlock, giving more efficient continuous beam behavior. C purlins are used in simple spans where that continuity is not required.
Are purlins suitable for roof and wall support?
They are. C and Z purlins serve as roof purlins for roof panels and as wall girts for wall cladding, which is why metal building systems use them so widely. Contractors in Miami use both.
Which materials and coatings can I order?
Galvanized steel with G90 or G60 coatings is available for every purlin, giving corrosion resistance and long-term performance in commercial, industrial, and agricultural environments.