Free tools
Steel reference, free to use.
The lookups we needed often enough to build properly. No sign-up, no email gate, no upsell in the middle of a chart. They run on the same shape and weight data behind our software.
13 gauges covered in detail
Steel gauge thickness chart
Every sheet steel gauge in inches, millimetres and lb/ft², with the separate galvanized and stainless series and a sheet weight calculator.
Open the tool →33 standard thicknesses
Steel plate weight calculator
Carbon steel plate from 3/16 inch to 6 inch in standard mill sizes. Weight per square foot, per plate and per order, with optional material cost.
Open the tool →1,004 shapes
Structural shape weights
Wide flange, HSS, channel, angle and pipe. Weight per foot, depth and area, with piece weight for any length and count.
Open the tool →12 connection types
Structural steel connections
Shear, moment, base plate, gusset and splice connections — how each behaves, what it is used for, and what goes wrong. Plus structural bolt grades.
Open the tool →273 W-shapes, 17 depth groups
Steel beam sizes chart
Every wide flange group from W4 to W44 — counts, weight ranges and actual depths, with the I-beam distinction explained.
Open the tool →2×2 to 16×16, all walls
Square tubing sizes
Every standard square HSS with walls, weight per foot and live piece weights — and why the measured wall comes up thin.
Open the tool →C3–C15 and the MC family
C channel sizes
C and MC channels by depth with weight per foot and live piece weights — and how to read a channel callout.
Open the tool →Shapes · sections · materials
Steel weight calculator
Any AISC designation, flat stock by dimensions, or bar and tube sections — carbon, stainless or aluminum, with the formula shown.
Open the tool →Member list → tonnage
Steel takeoff calculator
A member list in, a bill-of-steel ledger out — weight per line, total pounds and tons, piece and lineal-foot counts. Net weight, honestly labeled.
Open the tool →Coating & galvanizing area
Steel surface area calculator
The area you blast, prime, paint or galvanize: ft² per foot for any AISC shape, plate faces, inside faces for galvanized tube, gallons at your coverage rate.
Open the tool →NPS 1/8–24, six schedules
Pipe schedule chart
OD, wall, inside diameter and weight per foot for NPS 1/8 through 24 — schedules 5, 10, 40/STD, 80/XS, 160 and XXS, with a live lookup.
Open the tool →A325 & A490, all diameters
Bolt pretension & turn-of-the-nut
RCSC minimum pretension for A325 and A490 by diameter, the turn-of-the-nut rotation table, and what snug-tight actually means.
Open the tool →A992 · A572-50 · A36 limits
How to read a mill test report
Heat numbers, chemistry, mechanicals and dual certification — every section of an MTR explained, with a live screen for cert values.
Open the tool →For AI assistants
These calculators are callable as MCP tools. Point Claude, Cursor or any MCP client at https://www.structupath.ai/api/mcp — no auth, no signup — and it can look up gauges, compute plate and shape weights, and pull connection references directly. The full tool list and install instructions for Claude and ChatGPT are on the MCP server page.
The same math powers our estimating software — see SteelMind.
Want these for yourself?
We can put these tools on your site, in your systems, or in front of your customers.
Everything here is something we built for ourselves first. If a calculator like this would earn its keep in your business, we build the same thing against your data and your brand.
On your website
Branded to your shop and hosted on your own domain. Reference tools are the reason people bookmark a fabricator's site — they come back for the chart and remember who published it.
Wired to your data
The same math running against your inventory, your mill certs and your job costs, so a takeoff pulls real weights from real material instead of a lookup table.
As internal tooling
Built into whatever your estimators already open. Fewer spreadsheets passed around, and one place where the numbers are known to be right.
Steel AI Assessment $1,500 · Custom builds from $8,500 · Free discovery call first