Steel tube frame buildings rely on strong, readily available steel tubing to create sturdy frames for warehouses, workshops, and storage facilities. This guide highlights top steel tubes and related components from reputable brands, helping you compare options for DIY projects or small commercial builds. Each product is chosen for its material quality, ease of fabrication, and suitability for frame construction, with practical notes on sizing and compatibility.
Summary of chosen products:
- Small Parts ALL22183-4 Unpolished Rectangular Tube, 1″ x 2″, 4′ Length
- Generic DOM Steel Tubing, 1″ OD x 1/8″ Wall (5 ft)
- Generic DOM Steel Tubing, 1″ OD x 1/8″ Wall (48 in)
- Generic Mild Steel Square Tube, 1.5″ x 1.5″ x 40 in
- OnlineMetals A500/A513 Square Tubing, 1.5″ x 1.5″ x 36″, Hot Rolled
Small Parts ALL22183-4 Unpolished Rectangular Tube
Product overview and fit for frames: This unpolished mill rectangular tube measures 1″ by 2″ with a 0.120″ wall thickness and a 4′ length. Its rectangular profile is suited for panel frames, door supports, and cross members within small to mid-size steel frame builds. The 4′ length helps minimize joints in longer sections of a frame, while the 0.120″ wall offers a balance of rigidity and weight. Use with compatible fasteners, brackets, and welding or bolted connections for a robust structure.
Key considerations for this product: The rectangular geometry provides predictable torsional stiffness in frame corners, which is helpful for long spans in a shed or workshop. Availability of matching 1×2 members can simplify design, and the unpolished finish may require deburring or priming before coating. This option is well-suited to projects where visibility and access to interior framing are priorities, such as shelving supports or lightweight roofing frames.
1.00″ OD x 1/8″ Wall DOM Steel Tube, Seamless
Product overview and fit for frames: This seamless DOM (drawn over mandrel) steel tube features a 1″ outer diameter and 1/8″ wall thickness. DOM tubes are popular for frame construction due to their uniformity, smooth interior, and predictable bending characteristics. The 5 ft length option is convenient for mid-span framing in small buildings or as primary framing members in modular additions. Mild steel composition provides weldability and compatibility with common fasteners and brackets used in DIY steel frame projects.
Key considerations for this product: Seamless DOM tubes tend to have cleaner bends and fewer stress risers compared to some welded tubes. The trade-off is typically price and availability of longer lengths. When planning a frame, ensure your design accounts for precise OD tolerances and mating components for accurate joint assembly. This size is versatile for door frames, window headers, and supporting rails within a steel structure.
1.00″ OD x 1/8″ Wall DOM Steel Tube (48 in)
Product overview and fit for frames: This is the same DOM steel tube as the 5 ft version but in a shorter 48″ length. It provides the same advantages of consistent diameter and wall thickness, making it suitable for shorter frame sections, bracing, or custom connectors. The 1″ OD with 1/8″ wall remains a balanced choice for moderate load-bearing frames, especially in light commercial or agricultural buildings.
Key considerations for this product: Shorter lengths reduce waste from cuts and simplify shipping constraints. When used in conjunction with longer members, consider compatible joinery or gusset plates to maintain frame rigidity. It’s ideal for DIY users who need precise, repeatable tube sections for modular construction or repair projects.
1/8″ x 1.5″ x 1.5″ Mild Steel Square Tube
Product overview and fit for frames: This square tube option measures 1.5″ on each side with a 0.125″ wall thickness, offered in 40″ lengths. Square tubes provide straightforward corner geometry, which is advantageous for built-up frame structures, racks, or door frames. The 1.5″ square profile is common in light to medium-duty applications, balancing rigidity and ease of fabrication.
Key considerations for this product: Square tubing tends to stack well in frame assemblies, and it is compatible with standard 1/4″ or 3/8″ fasteners, gussets, and angle brackets. If your design emphasizes clean exterior lines or modular beam sections, this size is a reliable choice. Expect straightforward cutting and welding or bolting for strong frame joints.
OnlineMetals A500/A513 Square Tubing, 1.5″ x 1.5″ x 0.12″ Wall
Product overview and fit for frames: This hot-rolled square tubing is listed as 1.5″ x 1.5″ with a 0.12″ wall, a 36″ length. Made from A500/A513 carbon steel, it’s designed for structural framing, racks, and industrial fixtures. Hot-rolled stock offers good strength and predictable behavior under load, making it a staple for basic frame construction and fabrication projects.
Key considerations for this product: Hot-rolled stock typically requires deburring and surface finishing before painting or coating. The square profile is ideal for bolted or welded frame systems, with easy compatibility to other common sizes in shop-built structures. For larger frames, consider combining with larger members or gusset plates to distribute stress more evenly across joints.
1-1/2″ x 1-1/2″ x 11 Gauge A500 Steel Square Tube
Product overview and fit for frames: This square tube is constructed from A500 alloy steel, sized at 1.5″ by 1.5″ with 11 gauge thickness, and 48″ in length. It’s built for durability in higher-load frames, such as heavy-duty sheds, small industrial frames, or equipment cages. The 11 gauge implies a thicker wall for added rigidity and resistance to deformation under stress.
Key considerations for this product: The thicker wall increases weight and handling effort but improves stiffness and load-bearing capacity. When designing a frame, ensure joint connections can accommodate the heavier wall and that brackets or gussets chosen support the 11-gauge thickness. This size is well-suited for structural components requiring higher stiffness without escalating overall frame size.
Vigorous 1″ OD Stainless Steel Tube, 3 Ft
Product overview and fit for frames: This package includes two 3-foot lengths of 1″ OD, 0.065″ wall stainless steel tube. Stainless steel adds corrosion resistance, which is beneficial for outdoor or humid environments. The welded construction enhances joint integrity, and the 304 stainless grade is common for frames requiring long service life with minimal maintenance.
Key considerations for this product: Stainless steel tubes are pricier than mild steel options but offer superior corrosion resistance and aesthetics. If the frame will be exposed to moisture or chemicals, this material can reduce maintenance costs over time. For structural purposes, ensure compatibility with fasteners and welding practices suitable for stainless steel to maximize joint performance.
Hicarer 1-1/2″ OD Stainless Steel Tubing, 2 Feet
Product overview and fit for frames: This 1-1/2″ OD stainless steel tube with a 0.06″ wall thickness is 2 feet long. It’s designed for applications needing a robust yet manageable stainless steel member, offering good strength-to-weight characteristics and corrosion resistance. The polished surface is suitable for visible frames or decorative elements in addition to functional structures.
Key considerations for this product: Consider fabrication needs, as 304 stainless steel can be harder to cut or weld than mild steel. Ensure proper tooling, filler materials, and welding technique for stainless to achieve strong joints. This size is useful for precision frames, supports, or fixtures where stainless properties are advantageous.
Buying Guide: Key Purchase Considerations for Steel Tube Frame Projects
- Material type: Choose between mild steel, carbon steel (A500/A513), or stainless steel based on corrosion exposure, load requirements, and budget.
- Profile and size: Rectangular, square, or round tubes offer different structural characteristics. Consider load paths, joint methods, and compatibility with brackets and gussets.
- Wall thickness: Thicker walls increase stiffness and load capacity but add weight and cost. Match wall thickness to the expected service loads and fabrication method.
- Length and availability: Longer lengths reduce joints but can complicate shipping and handling. See if standard lengths fit your design and whether you can weld or bolt sections together efficiently.
- Finish and corrosion resistance: Outdoor or damp environments benefit from stainless or coated steel and rust-resistant hardware. Plan for primer, paint, or protective coatings as needed.
- Fabrication methods: Welding, bolting, and gusseting are common. Consider ease of assembly, required tools, and connection hardware when selecting tubes.
- Compatibility: Ensure selected tubes mate well with brackets, end caps, connectors, and reinforcement components within your frame system.
- Cost and availability: Compare prices and lead times across suppliers. Bulk orders may lower per-unit costs, while special finishes may raise the budget.
- Project type: For lightweight structures like hobby sheds or racks, milder tubes can suffice. For outdoor or high-stress frames, prioritize thicker walls or stainless options.
In summary, selecting steel tubing for tube frame buildings involves balancing strength, weight, cost, and fabrication practicality. The highlighted products provide a spectrum of options—from economical mild steel square and rectangular tubes to corrosion-resistant stainless steel lengths—helping you tailor your build to specific environmental and structural needs.