Structural steel supply
Galvanized steel in stock
HDG service available
Retail & wholesale, nationwide delivery
Supply — fabricate — galvanize, all under one roof. Full stock, factory pricing, nationwide pickup & delivery.
Supply • Fabricate • Galvanize — all in one place
Skip the multi-vendor coordination — HACHI sources the steel, fabricates the work, and hot-dips it in our own bath.
Structural Steel Supply
Full range of black & galvanized steel — H-Beam, I-Beam, Wide Flange, round/square tubes, plates, rebars — every size and thickness.
Hot-Dip Galvanizing (HDG)
We galvanize your fabricated frames, gratings, plates, J-bolts and all profiled steel to international standard. Door-to-door pickup & return.
Grating + Laser Cutting
We manufacture drain gratings and manhole covers to municipal, estate and factory spec — and laser-cut steel to your drawings.
Why choose hot-dip galvanized steel
Near the coast or any salt-air industrial zone, black steel rusts fast and painted coatings peel within 1–2 years. Hot-dip galvanized steel lasts 25–50 years with no repaint cycle.
Salt-air resistant
Proven across coastal Bangkok — Phra Pradaeng, Bang Khun Thien, Mahachai, Samut Sakhon and Samut Songkhram.
Inside-out coverage
Zinc bonds metallurgically to every surface — inside and outside the section. No flaking, 360° protection unlike paint.
Faster install
Hand the work over immediately — only weld points need touch-up. No primer, no top-coat, no waiting.
Saves labor + paint cost
Cuts the entire 3-coat paint cycle (primer, top, retouch) and the labor hours to apply it.
Why leading projects choose HACHI
TIS • JIS • ASTM Compliant
Every section meets Thai TIS, Japanese JIS and American ASTM standards, with mill certificates available on request.
In-house Galvanizing
Hot-dip galvanizing done in our own large bath — long structural pieces and big gratings handled in-house with full QA control.
Cut & Delivered
On-spec cutting (regular + laser) and direct delivery to site — less waste, less handling, faster builds.
One-Stop Supply
Black steel, galvanized steel, gratings, plates, J-bolts and flanges — all on a single transparent invoice.