10M Rebar: Diameter, Weight and Common Uses
10M rebar explained: 11.3 mm diameter (0.445 in), 0.785 kg/m, how it compares to 3/8 and 1/2 inch bar, bend and hook sizes, laps and where the OBC calls for it.
Home / Blog
Straight answers on rebar, structural steel, beams, lintels and fabrication, from the team that cuts, bends and welds it every day.
10M rebar explained: 11.3 mm diameter (0.445 in), 0.785 kg/m, how it compares to 3/8 and 1/2 inch bar, bend and hook sizes, laps and where the OBC calls for it.
How 10M, 15M, 20M and 25M rebar is priced: weight per bar, metres per tonne, and why fabricated small bars cost more per tonne. Plus how to compare quotes.
15M rebar explained: 16.0 mm diameter (0.630 in), 1.570 kg/m, why it matches 5/8 inch #5 bar and not 1/2 inch, bend and hook sizes, laps and where the OBC uses it.
20M rebar is 19.5 mm and 2.355 kg/m; 25M is 25.2 mm and 3.925 kg/m. Sizes in inches, US equivalents, hooks, laps and where each bar is used.
How ACI 318 and CSA A23.3 set rebar lap splice lengths: development equations, Class A and B, minimums, compression laps, bar size limits and a side-by-side example.
How US rebar detailing to ACI 318 and CRSI differs from Canadian practice under CSA A23.1, A23.3 and RSIC: bar sizes, grades, hooks, bend diameters, cover and laps.
When a telepost can be a permanent basement support under the 2024 Ontario Building Code, what the CGSB label means, and when to use fixed steel posts.
Why a load-bearing wall can't simply disappear, and the real options instead: flush beams, beams above the ceiling, posts and partial removal.
How anchor bolts and base plates fit together: oversized plate holes, plate washers, edge distance in steel and concrete under CSA A23.3, spacing and projection.
Are rebar prices going up in Canada? What the price indexes and 2025 to 2026 steel trade measures show as of October 2026, and how to protect your project budget.
Why steel beams get a wood top plate, how nailers are fastened to the top flange with bolts, pins or screws, and why shop-drilled holes save time on site.
How base plate layouts and anchor bolt plans are drawn, what a base plate template is, how it holds anchor bolts for the pour, and how to check them.
Base plate size and thickness chart for steel columns: the cantilever method, the Ontario minimum plate, standard thicknesses in mm and inches.
Base plates, end plates and gusset plates compared: where each goes, what it carries and how it is attached, plus cap plates, shear tabs, stiffeners and splices.
Base plate, sole plate, sill plate and bearing plate explained: what each one is, steel or wood, where it sits in a building and what the Ontario code says about it.
The 2024 Ontario Building Code rules for basement columns: steel pipe sizes, end plates, teleposts, wood and masonry minimums, footings, fastening and scope.
How to cover lally columns and steel posts in a basement: wrap kits, boxed columns, posts inside walls, what never to do to the column, and when Type X is required.
Does a basement floor slab need rebar under the Ontario Building Code? What Section 9.16 requires, when reinforcement is needed, and what size and spacing to expect.
Free quotations
Email your structural or rebar drawings and we'll come back with a detailed quote.