GFRP Rebar Pros and Cons: Is Fiberglass Rebar Any Good?
The real advantages and disadvantages of fiberglass (GFRP) rebar, what each one means on site and in design, and the jobs where it is worth using in Ontario.
The real advantages and disadvantages of fiberglass (GFRP) rebar, what each one means on site and in design, and the jobs where it is worth using in Ontario.
Fiberglass (GFRP) rebar sizes: CSA S807 diameters and nominal areas, weight per metre and per foot by grade from a real data sheet, and how they compare to steel.
How fiberglass (GFRP) stirrups, ties and dowels compare with steel: bend strength, stiffness, design rules, mixed systems, ordering and when GFRP shapes make sense.
Fiberglass (GFRP) rebar vs steel rebar: tensile strength, stiffness, weight, corrosion, cost drivers and the jobs where each one makes sense in Ontario.
How fusion-bonded epoxy goes on rebar: blasting, heating, electrostatic powder and curing, plus A775 vs A934 bar, green vs purple, and on-site repair.
What fiberglass rebar is made of and how it is produced: glass rovings, resin, the pultrusion line, surface coatings, factory-bent shapes and quality testing.
How rebar dowel length and embedment depth are set in Canada: CSA A23.3 development length, hooked dowels, OBC Part 9 minimums and drilled-in dowels.
Why there is no fixed bar count in a rebar bundle, how to work out bars per tonne for 10M to 35M, and what bundle tags and weights mean on a Canadian job.
Bar counts, metres and kilograms of rebar for a 30x40 slab and six other common slab sizes, in 10M and 15M at 400 mm and 300 mm spacing, with laps included.
How rebar pricing works in Canada: the base price, the extras added for size, grade, cutting and coating, wholesale vs retail, bulk orders and pricing by weight.
Where to buy rebar in Ontario: home centres, supply yards, rebar fabricators and supply-and-install. What each is good for, what to send, and how delivery works.
How to count dowel bars along a joint or wall, work out their length and unit weight, and total the tonnage, with worked examples for slab joints and wall dowels.
The rebar spacing conversion formula, worked swaps between 10M, 15M and 20M, imperial to metric conversions, and the checks that come after the math.
How to cut fiberglass (GFRP) rebar: which blades and saws work, why shears and torches are out, controlling glass fibre dust, PPE, cut ends and bent bars.
How rebar is doweled into existing concrete: who designs it, the adhesive, scanning, drilling, hole cleaning, setting and curing, and mistakes that weaken dowels.
How to tell what size rebar you have: read the rolled-on markings, measure the diameter, weigh a cut piece, and why paint colour is not a size code.
How to install fiberglass (GFRP) rebar: handling, cutting, non-metallic chairs, what to tie it with, laps and corners, and keeping a light mat from floating.
Epoxy-coated rebar is not banned in Canada or the US, but some owners stopped specifying it. What happened in Florida, where Ontario stands, and what it means.
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