We recently leased a warehouse space and decided to build modular workbenches on wheels using Semi Exact H-beam legs.
Project Overview
We ordered two sets of 32" tall, 40" wide H-beam legs in raw steel finish to create fraternal twin tables: one for welding and one for assembly work. Everything needed to be on wheels for flexible workspace layout.
Supplies used: Semi Exact H Beam Legs, Firm Grip Gloves, Powerpro #8 x 1-1/4" screws, wire cup brush, Lincoln MIG 140 welder, low profile locking casters, Evolution miter saw, Kreg Accu-Cut track system.
Building the Welding Table
We started with a 4ft square sheet of ¼" thick steel and removed surface rust using a wire wheel on an angle grinder.
Construction method:
- Built the table upside down to ensure leg alignment
- Positioned Semi Exact legs on the steel top
- Added pre-cut 2x2 square tubes as stretchers between legs for stability
- Cut bevels to clear weld beads on top stretchers
- Welded components together, alternating sides to minimize heat distortion
- Ground and dressed the weld beads for a clean appearance
- Stitch welded the frame to the steel tabletop
- Installed locking casters into threaded inserts on leg bottoms
Building the Assembly Table
For the second table, we constructed a plywood top using ¾" plywood.
Process:
- Used a Kreg Accu-cut attachment to cut the plywood sheet in half
- Applied wood glue generously to both halves
- Stacked and clamped the halves together
- Once dry, trimmed the perimeter for crisp edges
- Sanded with 120-grit sandpaper
- Positioned the Semi Exact legs on top
- Secured with 1-¼" Powerpro screws and washers into the leg slots
- Used shorter casters to accommodate the thicker tabletop
Final Result
Both tables feature the same leg system but serve different purposes: the welding table with its steel top for metal work, and the assembly table with its plywood top for general projects. Both roll freely on locking casters for workspace flexibility.