Wall Rebar: settings and bar quantities

Complete 86-field reference with options and effects · Actual Revit model and generated results.

Use this with the Wall Rebar walkthrough. Open 01-Thep-vach-Revit-2024.rvt from the practice ZIP, then Save As. In a wall mesh, spacing normally controls the number of distributed bars; boundary bars also have a direct count field.

Choose the override scope first

Values inherit in this order: standard profile → layout template → project → core → storey group → branch → storey → zone. The most specific value wins. The right-panel breadcrumb shows the current scope. ○ means inherited; ● ↩ means a local override, and ↩ removes it.

Desired change	Select	Effect
Project baseline	Detailing standard… and apply the profile to the project	Used where no narrower override exists.
Whole core or several levels	Core or Storey group	Descendant branches/storeys inherit it unless overridden.
One wall branch	Branch	Only this branch and its inheriting levels.
One level	Storey or a storey-table cell	Only the selected branch and storey.
A wall end, opening edge, or joint	Zone on the plan	Only that selected area.

① core/branch selection; ② preview tabs; ③ scope breadcrumb and editable fields; ④ double-click a storey-table cell for one story; ⑤ Create rebar; ⑥ story range and standard.

Increase, decrease, and revise bars

Case	What to edit	Verify
More vertical web bars	Vertical web bars → Maximum spacing a, e.g. 200 → 150 mm.	Smaller spacing normally creates more bars. Inspect Plan and Statistics; actual count depends on branch length and distribution mode.
Fewer vertical web bars	Increase a, e.g. 150 → 200 mm; check Distribution.	Re-run Check for spacing, ratio, and clearance findings.
More/fewer horizontal rows	At Storey or Branch, decrease/increase Horizontal bars → Spacing a.	Inspect Elevation, first-row offset s0, and whether bars pass through the slab.
Change diameter only	Vertical web bars → Diameter or Horizontal bars → Diameter.	Recheck lap/anchorage length, clearance, and mass; diameter changes do not inherently change bar count.
More/fewer boundary bars	Select a boundary Zone → Bars per face nX and diameter.	Inspect the boundary section; this does not change the web mesh count.
More/fewer boundary hoops	Lower/raise a1 in hcr / a2 outside hcr.	Inspect Plan, Elevation, 3D, and hoop-spacing warnings.
More/fewer S-ties	Under S-ties, reduce/increase the number of vertical/horizontal bars between ties.	Check the tie layer and TIE_DENSITY.
Revise L/T/X joints	Select the joint Zone, edit diameter/maximum spacing; joint extension belongs to Core.	Inspect joint bars and anchorage warnings.
Different reinforcement by floor	Select a Storey group or edit Vertical / Horizontal / Boundary / Hoops / S-ties in the storey table, e.g. Ø16a150 → Ø14a200.	The edited cell becomes an override; inspect transitions and starter bars at the floor.
Copy a floor's arrangement	Copy storey → other storeys…, then select target storeys and one branch/whole core.	Read each target row before creating.
Change lap length/location	Vertical laps → Ll, position, e0, staggering, lap type.	Check Elevation and 3D; manual Ll below the calculated value raises LAP_SHORT.
Change opening reinforcement	Select the opening edge Zone, then edit edge bars, diagonals, boundary region, and lintel bars/stirrups.	Check the opening in Plan/3D and opening warnings.
Revert an edit	Click ↩ on an overridden field, or Undo before creating.	The field returns to ○ and inherits its parent value.

Exercise: on the F3 model, select storey group L6–Roof and branch V2. Change vertical maximum spacing from 150 to 200 mm and compare Plan/Statistics. Restore 150 mm; then select only L6 and change Ø14 to Ø16. Other storeys should stay unchanged. Click Check after every revision.

What each Detailing standard group controls

Open Detailing standard… at the top. Select a group at left, edit in the middle, read formulas/lap lengths at right, Save, then Apply to project. Units are mm unless a field states degrees, percent, bars, or a factor.

① groups; ② editable values; ③ rules and diameter-based anchorage/laps; ④ profile actions. Save is at the bottom-right. The screenshot shows the vertical-lap group.

Group	Purpose
Materials & cover	Concrete/main and tie steel for anchorage and bar types; wall/slab/foundation cover positions bars; horizontal bars inside/outside vertical bars.
Seismic	Selects None/Low/Medium/High rules for critical regions and confinement; follow the engineer's design.
Vertical web bars	Diameter, maximum spacing, and even or end-remainder distribution.
Horizontal bars	Diameter, spacing, first-row offset, through-slab option, U/90° free ends, L-corner and T-joint treatment.
Boundary regions	Enable/disable, length formula/fixed/count, bars per face, diameter, hoop diameter and a1/a2, C-ties, through-slab hoops.
L/T/X joint regions	Joint-branch extension, bar diameter and maximum spacing.
S-ties	Diameter, bars between ties horizontally/vertically, stagger/grid pattern, hook angles.
Vertical laps	Ll from standard, diameter factor, or manual mm; tension/compression, rounding, location/e0, staggering, web/boundary type, storeys per bar, stock length.
Storey transitions	Maximum offset, bend slope, and anchorage leg when wall alignment/thickness changes.
Wall base	Separate/continuous foundation starter bars, foot length/direction, ties in foundation.
Wall top	Bent leg into slab, U-cap, or straight starter; leg direction.
Openings & lintels	Ignore-small-opening threshold, edge/diagonal bars, jamb boundary, lintel top/bottom bars and stirrups.
Output & information	Rebar Partition, level parameter, view colorization, solid 3D display; affects output rather than strength design.
Check thresholds	Fourteen limits including cover, clearance, thin wall, S-tie density, bend slope, T-joint anchorage, and opening trim. These change warnings, not the number of bars; override only at Project.

Save and create again

1. Save settings stores the plan in the model. Check does a trial Revit write and rolls it back. Resolve cover, clearance, short-lap, or missing-shape/bar-type errors.
2. Create Rebar · N cores writes the bars. Compare the result table and Statistics by diameter, count, length, and mass; inspect the edited storey in Revit 3D.
3. Create again after changes: unchanged sets retain their Rebar IDs; changed sets are updated; obsolete sets are removed. If tool-created bars were manually edited, the prompt means Yes = keep manual changes; No = overwrite from the current plan; Cancel = stop.
4. If quantities did not change, check the scope, a narrower override, distribution mode, whether the core was ticked, and whether you ran Create again.

Engineering review

All numeric examples show UI operations only. The engineer must verify required steel area, cover, laps, anchorage, and detailing before issuing a model.