Custom Galvanized Steel Double-Channel Laced Column with Diagonal Bracing & Base Plate for Lightweight Structural Applications

Target Keywords

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Brief Description

Lightweight galvanized steel laced column with two parallel channel/I-beam chords connected by continuous zig-zag diagonal bracing. Offers high axial capacity with 30-40% less steel weight than a solid section column of equivalent strength.

Detailed Description

This laced (truss-type) column is a structurally efficient alternative to solid H-beam or box columns, particularly for lightly loaded columns in single-story industrial buildings, pipe racks, conveyor support structures, and equipment platforms. The column consists of two parallel vertical chords - one I-beam profile, one square hollow section (composition can be symmetric or asymmetric per design) - connected by a continuous zig-zag diagonal bracing system. The diagonals are welded at every node (chord-diagonal intersection), converting the two chords into a composite section that resists buckling as a single unit. The key advantage is weight efficiency: a laced column achieves the same Euler buckling capacity as a solid column but with 30-40% less steel, because the chords are positioned at the extreme fibers of the section (maximizing the moment of inertia I) while the lacing merely provides shear transfer between chords. The column is welded to a rectangular base plate with 4 pre-drilled anchor bolt holes (one per corner) and triangular gusset plates reinforcing the chord-base connections. The complete assembly is hot-dip galvanized to ISO 1461 (70-100μm), with the open lattice structure allowing excellent zinc coverage of all surfaces - including the inside faces of the chords - due to unrestricted zinc flow during immersion. Laced columns are also advantageous where services (pipes, conduits) must pass through the column zone - the open lattice gaps provide natural routing paths without requiring cast-in sleeves or core-drilled holes.

Product Attributes

Product Selling Points

30-40% weight reduction vs solid columns: By placing the chord material at the section extremes and using light lacing for shear transfer, the column achieves high I (moment of inertia) with significantly less total steel weight - saving material cost and foundation load

Open lattice = perfect galvanizing: The open structure allows unrestricted zinc flow during HDG immersion - every surface of every chord, every diagonal, and every weld joint gets full zinc coverage with zero trapped air pockets

Service-friendly design: Pipes, electrical conduits, and small cable trays can pass through the open gaps between lacing diagonals - no need for cast-in sleeves, core drilling, or post-installation penetrations through a solid column section

Customizable chord configuration: Mix I-beam and SHS chords, use different chord sizes for different loading directions, vary lacing spacing along the height - the design adapts to your load profile rather than forcing your loads into a standard section

Aesthetic alternative: The lattice pattern creates visual interest for exposed structures - mezzanine columns, canopy supports, and architectural steel features - at lower weight than equivalent solid sections

Inspection-friendly: All chord-lacing weld joints are visible and accessible for inspection at any time during the column's service life - no hidden welds inside closed sections

Company Advantages

Laced column engineering: Our team calculates the effective moment of inertia of the built-up section per AISC 360 Section E6 or EC3 Part 1-1 Section 6.4, accounting for shear deformation in the lacing system

Cost-effective for low-to-medium loads: Where a solid H-beam would be oversized (governed by minimum section rather than load), a laced column provides exactly the required capacity without wasted steel

Fabrication flexibility: We fabricate laced columns from standard hot-rolled sections (channels, angles, flats) - no custom rolling or special mill orders required, reducing lead time and material cost

Complete design package: We provide the buckling analysis, chord sizing, lacing design, and connection details as part of our standard engineering service

Global shipping optimized: Laced columns can be shipped knocked-down (chords and lacings separate) for container optimization, then assembled on site with bolted lacing connections - reducing freight volume by up to 60%

Frequently Asked Questions

Q1: When should I choose a laced column over a solid H-beam or box column?

A: Laced columns are optimal when: (1) The column is lightly to moderately loaded (axial load <200 tons) but tall (8-20m) - Euler buckling governs and a laced column achieves the required I with less steel. (2) Weight reduction is critical - reducing foundation size, seismic mass, or transport cost. (3) Services must pass through the column zone. (4) Appearance matters - the lattice pattern is a design feature. For heavy loads (>300 tons) or very short columns, solid sections are usually more economical.

Q2: How do you calculate the buckling capacity of a laced column?

A: The design accounts for shear deformation in the lacing, which reduces the effective buckling load compared to a solid section with the same gross I. Per AISC 360 Section E6, we calculate a modified slenderness ratio (KL/r)m that includes a shear flexibility term, then determine the buckling stress from the column curve. The lacing itself is designed to resist a shear force equal to 2% of the column axial load (AISC) or per EC3 Part 1-1 Section 6.4. We provide the full calculation in the design report.

Q3: Can the laced column be shipped disassembled and bolted on site?

A: Yes - this is a significant logistics advantage. The chords and diagonal lacings are fabricated with bolted connection plates and shipped as separate bundles (all parts labeled). On site, the crew bolts the diagonals to the chords using the pre-drilled connection plates. The bolted option is ideal for export projects where container volume is a cost driver. For domestic projects, we typically ship pre-assembled for faster erection.

Q4: What is the difference between lacing and battening in a built-up column?

A: Lacing uses diagonal bars (single or double zig-zag) that form a truss-like shear transfer system - efficient, lightweight, and preferred for columns. Battening uses horizontal plates (battens) connecting the chords at regular intervals - the chords between battens act as short columns in local buckling, which is less efficient than lacing for tall columns. Our default is single-lacing for most applications; we use double-lacing for heavy loads and battens only for short, lightly loaded columns or architectural preference.

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