System Shoring

A modular shoring tower built from Ø65.0 mm posts and H1 ledgers, carrying wet concrete slab loads down to the deck below through U-head jacks, primary beams and adjustable base jacks.

Star Flange Node

Built to Carry Load Straight Down

Shoring posts run Ø65.0 mm and carry a 8.0T star flange measuring 120 × 120 mm. The heavier post and flange are what separate shoring from access scaffolding: the tower's job is vertical load transfer, not providing a walking platform.

Five post lengths — P-17, P-12, P-08, P-04 and P-02 — combine with screw-adjustable base and U-head jacks so the tower height can be tuned to the slab soffit on site.

Request a Quotation → Compare with Hybrid Support

Shoring posts P-17, P-12, P-08, P-04 and P-02 drawn to scale with their lengths in millimetres, alongside a detail of the 120 × 120 mm star flange — Shoring posts, P-17 to P-02, with star flange detail

Engineering Data

Posts & Ledgers

Dimensions and unit weights as published in the SEIYON SYSTEM shoring manual.

Shoring Post

Product	Length	Unit Weight
P-17	1,725 mm	8.0 kg
P-12	1,291 mm	6.4 kg
P-08	863 mm	4.3 kg
P-04	432 mm	2.7 kg
P-02	216 mm	1.8 kg

Outside diameter Ø65.0 mm · star flange 8.0T, 120 × 120 mm

Shoring Ledger

Product	Length	Unit Weight
H1-18	1,768 mm	4.6 kg
H1-15	1,463 mm	4.0 kg
H1-12	1,158 mm	3.3 kg
H1-09	853 mm	2.6 kg
H1-06	549 mm	2.0 kg
H1-03	244 mm	1.7 kg

An H1-18 ledger sets a post spacing of 1,829 mm.

Shoring ledger sizes H1-18 through H1-03, showing the ledger pin, head casting and pin hole for diagonal brace connection — Ledger range with pin and head casting callouts

Close-up of the shoring ledger head casting — Ledger head casting

Component Range

Shoring Components

U-Head Jack

UH-43 · Ø43, 600 mm · 5.0 kg

Base Jack

JB-43 · Ø43, 600 mm · 3.9 kg

Socket / Coupler

Ø60.5 × 120 mm · 0.9 kg

Shoring Truss

TR-1524 · 1,524 mm · 16.7 kg

Diagonal Brace

Six sizes, B1715 to B1209
3.8 – 5.3 kg

Primary Beam

75 × 125 × 2.9T
1.0 m to 3.0 m

Diagonal Brace

Product	Length	Unit Weight
B1715	2,139 mm	5.3 kg
B1712	1,974 mm	5.0 kg
B1709	1,845 mm	4.7 kg
B1215	1,807.5 mm	4.6 kg
B1212	1,609 mm	4.2 kg
B1209	1,447.5 mm	3.8 kg

The code pairs the post with the bay it braces: B17xx suits a P-17 lift, B12xx a P-12, and the final digits give the bay spacing.

Primary Beam

Length	Section	Unit Weight
1.0 m	75 × 125 × 2.9T	9.0 kg
1.5 m	75 × 125 × 2.9T	13.4 kg
2.0 m	75 × 125 × 2.9T	17.7 kg
2.2 m	75 × 125 × 2.9T	19.1 kg
2.5 m	75 × 125 × 2.9T	21.7 kg
3.0 m	75 × 125 × 2.9T	26.5 kg