Beam Rebar List for Shop Drawing (After Design)

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Beam Rebar List for Shop Drawing (After Design)

A practical workflow used by site engineers: from structural design result → rebar schedule → shop drawing → BBS.

For RC Beam
Shop Drawing
BBS (Bar Bending Schedule)
Site + Fabrication Ready
What you must have before making the list
  1. Beam size: b × h, slab thickness (if T-beam).
  2. Clear cover (your project standard).
  3. Top bars (support) + bottom bars (midspan).
  4. Extra bars (negative moment bars at support).
  5. Stirrups dia and spacing: @100 / @150 zones.
  6. Lap splice & development length rules.
Tip: Freeze the design first. If design keeps changing, your rebar list will be wrong and shop drawing will be reworked.
Step 1 — Create Beam Rebar Schedule (Main List) Core Table▾

This is the main list used to generate shop drawings and BBS.

Beam ID Position Bar Type Dia Qty Shape Length Remark
B1 Support Top main DB16 3 01 (Straight) 3200 mm Negative moment zone
B1 Midspan Bottom main DB16 2 01 (Straight) 4000 mm Positive moment zone
B1 Support Extra top DB12 2 02 (L/Bent) 1200 mm Extend 0.30L
B1 All Stirrups R8 @100/@150 05 (Closed) — Shear zone + normal zone
Rule: One beam usually needs many rows. That is correct. The list must separate Support and Midspan.
Step 2 — Define Bar Shapes (Stop fabricator guessing!) Shape Code▾
  1. Shape 01 — Straight bar (top/bottom main).
  2. Shape 02 — L-bar / Bent bar (extra top bars).
  3. Shape 05 — Closed stirrup (rectangle with hooks).
Site Tip: Always put shape code + dimension in your drawing. If not, workers will bend with “feeling” and you will lose time & steel.
Step 3 — Calculate Bar Length (Fabrication length) Length▾

Use a simple method (works for Excel & CAD):

  1. Straight bars: span + development each end (or hook rule).
  2. Bent bars: straight parts + hook + bend allowance.
  3. Stirrups: perimeter (centerline) + hooks.
QC Check: Always check cover + stirrup dia + main bar dia. Wrong cover = wrong effective depth = wrong steel placement.
Step 4 — Assign Bar Marks (IDs) B1-01▾

Bar mark is the bridge between drawing, list, and cutting.

Bar Mark Meaning Example
B1-01 Beam B1 Top main 3DB16 (Support)
B1-02 Beam B1 Bottom main 2DB16 (Midspan)
B1-03 Beam B1 Extra top 2DB12 (0.30L)
S1 Stirrups type 1 R8 @100/@150
Tip: If two beams are identical, you can reuse the same bar marks to reduce confusion.
Step 5 — Make BBS (Bar Bending Schedule) BBS▾

This is what your steel yard + workers will use for cutting and bending.

Bar Mark Dia Shape Qty Length (mm) Total Length
B1-01 16 01 3 3200 9600
B1-02 16 01 2 4000 8000
B1-03 12 02 2 1200 2400
S1 8 05 24 920 22080
Final Check: Convert to number of 12m bars (stock length), estimate waste, and plan cutting order.
Quick Checklist (Site Engineer)
  1. Beam ID matches plan (B1, B2, B3…).
  2. Top bars split into: Support + extra bars.
  3. Bottom bars: midspan bars + continuity bars.
  4. Stirrups zones: near support tighter spacing.
  5. Bar marks: B1-01, B1-02… consistent everywhere.
  6. BBS totals match rebar schedule totals.
Common Mistakes:
  • Forgetting lap splice location.
  • No shape code → wrong bending.
  • Wrong cover assumption.
  • Stirrups spacing not separated by zones.
Smart Buttons

Tip: You can copy the template and paste into Excel or Google Sheets.

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