# Steel BBS Calculator A1 Pro — Steel bar, beam, column & slab

> Construction app for accurate steel reinforcement calculations and material estimation. (iPhone/iPad app by Binary And Bricks Pvt Ltd.)

- Source: https://appshunter.io/ios/app/steel-bbs-calculator-a1-pro/id1606618896 (this page in markdown: same URL + `.md`)
- Developer: [Binary And Bricks Pvt Ltd](https://appshunter.io/developer/1587170688)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Rating: 3.20/5 from 5 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 61 MB
- Languages: American English
- Released: 2022-01-23
- Data updated: 2026-10-24
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/steel-bbs-calculator-a1-pro/id1606618896/reviews.md

## What is Steel BBS Calculator A1 Pro?

COMPLETE REBAR DETAILING & BBS SUITE FOR CIVIL ENGINEERS & CONTRACTORS

Constropedia Steel BBS Calculator is the complete civil and structural engineering companion for reinforced concrete (RCC) design, site rebar estimation, and Bar Bending Schedule generation.

COMPREHENSIVE STRUCTURAL MEMBER COVERAGE:
- Footings & Foundations: Isolated Footings, Raft / Mat Foundations, Combined Footings, Strap Footings, and Pile Caps.
- Vertical Elements: Columns (Rectangular & Circular), Boundary-Confined Shear Walls, and Bored Cast-in-Situ Piles.
- Beams & Slabs: Continuous Beams, Plinth Beams, One-Way & Two-Way Slabs, Flat Slabs with Drop Panels, Cantilever Slabs, and Circular Slabs.
- Specialized Structures: Lintel with Chajja (Sunshade), Staircases (Waist Slab), Vehicular Ramps, Rectangular Water Tanks, and Circular Water Tanks.

ENGINEERING CAD REINFORCEMENT DRAWINGS:
- Auto-generated structural drawings detailing main bars, distribution steel, ties, and shear stirrups.
- Pan and zoom CAD viewer with grid overlay and real-time parameter callouts.
- Clean diagrams formatted for direct engineering review and site execution.

SMART SITE REBAR CALCULATORS:
- Rebar Substitution: Calculate exact bar counts or spacing adjustments when site diameters differ from design drawings.
- Area of Steel (Ast): Multi-layer bar combinations, steel percentage checks, and reverse spacing lookups.
- Coupler vs Lap Splice: Determine exact cost savings and steel tonnage saved by switching to mechanical couplers.
- Binding Wire, Chairs & Spacers: Estimate wire bundles, rebar chair heights and weights, and cover block quantities accurately.

QUALITY ASSURANCE & LAB COMPLIANCE:
- Mill Test Certificate (MTC) evaluation against IS 1786, ASTM A615/A706, BS 4449, AS/NZS 4671, and CSA G30.18.
- Visual ISO 8501-1 Rust Grading guide with actionable site acceptance recommendations.
- Code-compliant sample frequency estimator by batch tonnage.

GLOBAL REGIONAL STANDARDS:
- Switch effortlessly between Metric and Imperial units.
- Dedicated regional bar catalogues: India (6mm to 40mm), USA (#3 to #18), UK (H8 to H40), Gulf (T8 to T32), Australia (N10 to N36), and Canada (10M to 55M).

PROFESSIONAL BRANDED PDF REPORTS:
- Export multi-page reports featuring scaled CAD details, entered design parameters, and complete BBS weight breakdowns.
- Custom corporate headers with company name, address, contact details, and engineer logo.

## Key features

- Bar bending schedules for slabs, columns, footings, beams
- Steel weight estimation
- Quantity calculations for structural elements
- Cutting length and lap length calculations
- BBS shapes codes and tensile strength testing
- Integrated scientific calculator

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Version | $4.99 | one-time |


## Is Steel BBS Calculator A1 Pro safe?

Not enough ratings yet to assess Steel BBS Calculator A1 Pro.

## Is Steel BBS Calculator A1 Pro legit?

Steel BBS Calculator A1 Pro appears to be a legitimate app. The AppsHunter Legitimacy Score for Steel BBS Calculator A1 Pro is 90 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/steel-bbs-calculator-a1-pro/id1606618896/reviews.md

### 1/5 — NOT WORKING

*2024-12-08*

CANT BUY PREMIUM , App restarts

**Developer response:** Sorry for the inconvenience. Please update the app to the latest version and try again. If the issue continues, please email us at techsupport@binaryandbricks.com
 so we can help you. 🙏

### 5/5 — Good app

*2024-08-13*

Best for steel quantities and bbs

**Developer response:** Thank you for your support! We're glad the app is helpful for construction professionals.

## Frequently asked questions about Steel BBS Calculator A1 Pro

### What is Constropedia Steel BBS Calc used for?

Constropedia Steel BBS Calc is used for performing accurate steel reinforcement calculations. This includes generating bar bending schedules, estimating steel weights, and calculating quantities for various structural elements like footings, columns, beams, and slabs.

### Who is the target audience for Constropedia Steel BBS Calc?

The app is designed for civil engineers, construction contractors, site managers, and estimation engineers. It aims to support a wide range of construction-related tasks for professionals in the field.

### Does Constropedia Steel BBS Calc offer advanced calculation features?

Yes, it offers advanced features such as precise bar bending schedules for multiple structural elements, an advanced steel weight calculator, and detailed insights into total and individual bar lengths and weights.

### How user-friendly is Constropedia Steel BBS Calc?

The app features a user-friendly interface designed to be accessible to both technical and non-technical users. Accurate calculations can be performed with just a few taps, whether on-site or in the office.

### What kind of structural elements can Constropedia Steel BBS Calc calculate steel for?

Constropedia Steel BBS Calc can calculate steel quantities for footings, columns, beams, and slabs. It also includes calculations for cutting length and lap length with various options to suit different construction needs.

### Does Constropedia Steel BBS Calc have ads?

Constropedia Steel BBS Calc does not contain advertisements. It is a free application focused on providing calculation tools without interruptions.

### What is the rating and age appropriateness of Constropedia Steel BBS Calc?

The app has a rating of 3.8 stars from 4 ratings and is considered appropriate for users aged 4 and above. It is available on iPhone, iPad, and iPod.

### How often is Constropedia Steel BBS Calc updated?

The latest version of Constropedia Steel BBS Calc is 2026.03.01, and it was last updated on March 12, 2026. This indicates regular updates to maintain functionality and potentially add new features.

## Version history (last 5 releases)

### 2026.10.01 — 2026-10-03

WHAT IS NEW IN THIS VERSION:

11 NEW STRUCTURAL ELEMENTS:
- Raft and Mat Foundations, Combined and Strap Footings, Pile Caps.
- Boundary-confined Shear Walls, Plinth Beams, Lintel with Chajja.
- Flat Slabs with Drop Panels, Water Tanks (Rectangular and Circular), Access Ramps.

CAD DRAWINGS AND DETAILING:
- Scaled 2D structural reinforcement drawings with pan, zoom, grid, and live dimensions.
- Full-bleed drawing layout preventing any edge cutoff.

ADVANCED SITE REBAR TOOLS:
- Rebar substitution by bar count or spacing.
- Area of Steel (Ast) suite with multi-group bar combinations.
- Coupler vs Lap splice cost-benefit analyzer.
- Binding wire, chair rebar, and cover block calculators.

QUALITY AND TESTING:
- Lab test compliance checker for IS 1786, ASTM A615/A706, BS 4449, AS/NZS, CSA.
- ISO 8501-1 visual rust grading guide and sample frequency planner.

GLOBAL REGIONAL STANDARDS:
- Dynamic rebar catalogues for India, USA, UK, Gulf, Australia, and Canada.

MULTI-PAGE PDF REPORTS:
- Export CAD drawings with entered dimensions, complete BBS quantity take-offs, and company logo.

### 2026.03.01 — 2026-03-12

International Rebar Standards
Now supports 5 global design standards — IS 456, ACI 318 (USA), BS 8110 (UK/Gulf), AS 3600 (Australia), and Eurocode 2 (Europe). Bar sizes, grades, and designations update automatically when you switch standards. ACI bars show actual ASTM A615 diameters (#3 = 9.525 mm, #4 = 12.7 mm, etc.).

Unit System Selector
Choose between Metric, Imperial, or International units. All calculators respect your choice — weights in kg or lb, lengths in meters or feet, dimensions in mm or inches. Centimeter input now supported.

New Calculators

Cover Calculator — find nominal cover by element type and exposure condition
Development Length — compute development and lap splice lengths per your standard
Shape Calculator — rebar shape estimation with custom diameter support
BBS Quantity PDF Export
Export your Bar Bending Schedule quantity summary as a branded PDF with your company logo and details.

Bug Fixes & Improvements

Fixed cutting length formulas for L, U, and Stirrup shapes
Improved dark mode styling across all screens

### 2024.08.01 — 2024-08-12

We've added powerful new tools to boost your calculations:
Lap Length & Types
New Cutting Length Section
Unit Converter: Length, Area, Volume
Bond Strength & Corrosion Tests
Dimensional, Fatigue & Hardness Tests
Update now to explore all the new features!

### 2023.23.03 — 2023-08-12

*minor bug fixes

### 1.0.4 — 2022-03-09

* bug fixes

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-24.*