Architecture grids — three architectural planning systems, in one free tool.
Structural Grid (column placement and bay sizes), Le Corbusier Modulor (human-scale proportions based on phi), and Tartan Grid (two-direction structural rhythm). For architects, urban planners, and architecture students.
Architecture grids are planning grids drawn over architectural plans, elevations, or sites to organise structural elements, proportions, and rhythmic relationships. Grid Maker Pro ships three: the Structural Grid (column positions and bay sizes), the Le Corbusier Modulor (human-scale proportions based on phi and the average human body), and the Tartan Grid (two-direction structural rhythm with alternating wide and narrow bays, common in Renaissance Palladian architecture).
- Overlays in this category
- 3
- Codified
- 1570–1958 (Palladio → Mies)
- Dominant disciplines
- Architecture · planning · interiors
- Beginner-friendly count
- 1 of 3
- Advanced count
- 1 of 3
- Cost
- Free forever · in browser
Decision wizard — which architectural grid?
One question routes you to the proportioning system you need.
Why the grid system in architecture matters
Architecture without a grid is possible but inefficient. Every building has hundreds of dimensional decisions (column bay spacing, wall thickness, window placement, door heights, ceiling levels, parapet heights, stair widths) and managing them independently produces buildings that read as a collection of arbitrary measurements rather than a unified design. Grids solve this by reducing the available dimensions to a small canonical set; every element snaps to the structural grid lines, and the whole reads as integrated.
The three grids in this category each address a different dimensional layer. Structural grid handles the load-bearing skeleton (columns, beams, bearing walls). Modulor handles the human-occupied volume (ceilings, doors, windows, furniture). Tartan handles the rhythmic interplay between served and servant spaces (mechanical, electrical, plumbing risers between structural bays). A well-designed building typically uses all three at once, coordinated so the module and bay dimensions stay consistent across the project's drawings.
The historical context is worth noting briefly. Pre-industrial architecture used proportional systems anchored to specific construction methods (the cubit and palm of Egyptian temple architecture, the module of classical Greek and Roman orders, the foot and inch of medieval European cathedral construction). Industrial-era architecture introduced explicit grids tied to standardised structural materials (steel I-beams at 8-foot spacing, reinforced-concrete bays at 20-foot spans). Contemporary architecture combines both — the structural grid is industrially-derived, the human-scale grid is proportionally-derived (Modulor, Vitruvian, or contemporary anthropometric).
All 3 architecture grids
Reading existing buildings through their grids
One useful exercise for students and designers approaching the category for the first time is to take a building you know — your office, your school, a notable local landmark — and reverse-engineer its underlying grids. Where are the structural columns spaced? At what dimensions does the Modulor or anthropometric proportion appear (ceiling heights, door heights, window-sill heights)? Is there a Tartan rhythm between structural bays and service zones? The exercise teaches you to see the grids in built work, which is the prerequisite for using them in your own designs.
A brief history of architectural grids
Architectural grids predate modernism by millennia. Ancient Egyptian temple plans used proportional grids; Greek classical architecture (Parthenon, c. 432 BC) used metrical grids tied to column-spacing modules; Roman urban planning (the cardo-decumanus axis system, c. 1st century BC) imposed regular grids on entire cities. The Renaissance revived classical proportion through Vitruvius4 and Palladio, who used the Tartan Grid extensively in his Villa designs (Villa Rotonda, c. 1567).3
Modernist architecture made grids central to design methodology. Le Corbusier published The Modulor in 1948, proposing a universal human-scale proportional system based on phi;1 he extended and revised the system in Modulor 2 (1955) after a decade of building with it.2 Mies van der Rohe's steel-frame architecture (Seagram Building, 1958; Crown Hall, 1956) made the structural column grid the visible organising principle of the building. SOM and other corporate firms standardised the structural grid as a planning tool throughout the 20th century — a method since codified in architectural pedagogy.5
Contemporary architecture uses grids selectively. Postmodernism (Robert Venturi, Charles Moore) reacted against the Modulor's universalism. Computational design (Frank Gehry, Zaha Hadid) replaced regular grids with parametric systems. But structural grids remain essential for any building with a regular column system, and Modulor proportions still influence residential architecture where human-scale ergonomics matter.
Choosing between the three architecture grids
The three grids in this category solve fundamentally different problems and rarely substitute for one another.
Structural grid for any drawing where the column or load-bearing-wall positions are the design constraint. Used in floor plans, sections, and overhead axonometric views. The grid module is typically dictated by the structural system (8–12m steel-frame bays; 6–9m concrete-frame bays; ~3.5m timber stud spacing). Set the cell size to match your actual structural module.
Le Corbusier Modulor for human-scale design decisions — window heights, ceiling heights, door widths, furniture proportions, residential planning. The Modulor's red and blue series (70/113/183 cm and 86/140/226 cm respectively) define a φ-derived sequence that matches reachable, sittable, standable, and overheadable dimensions for the canonical 6-ft human. Most applicable to residential, hospitality, and human-occupied interior design; less applicable to industrial or warehouse architecture.
Tartan grid for designs where the rhythm of the structural module alternates between wide and narrow zones — Palladio's villas, Mies's curtain-wall buildings, modern office towers with regular structural bays interspersed with mechanical service zones. The Tartan creates a two-frequency rhythm that the eye reads as more sophisticated than a uniform grid.
The architectural-grid workflow from sketch to construction document
Working architects rarely use a single grid throughout a project. The grids serve different phases of the work and are layered as the design evolves from initial concept to construction drawing.
Phase 1 — concept sketches. The Modulor and golden ratio establish overall proportional logic for the building's massing and major dimensions. At this phase the architect is sizing the building's relationship to the human body and to the site; structural specifics are not yet defined.
Phase 2 — schematic design. The structural grid becomes the dominant tool. The architect picks a structural module (8m steel bays, 6m concrete bays, whatever the structural engineer recommends for the project's span and loading) and lays the floor plan to that grid. The Modulor remains in the background to govern ceiling heights and human-occupied interior dimensions.
Phase 3 — design development. The Tartan grid often emerges at this phase when the architect introduces service zones (mechanical, electrical, plumbing risers) between the structural bays. The two-frequency Tartan rhythm of "structural bay + service zone + structural bay" is the working layout for most commercial and institutional buildings.
Phase 4 — construction documents. All three grids are documented explicitly on the drawing set. The structural grid carries column-line designations (A1, A2, B1, B2 ...) that locate every element on the drawings. The Modulor is implicit in the documented ceiling and door heights. The Tartan rhythm shows in the reflected ceiling plan and the mechanical-services drawings.
The workflow is not strictly sequential — architects iterate back through earlier phases as the design develops — but the grid sequence is consistent enough that it can serve as a useful mental model for both teaching and practice.
When NOT to use a grid
Not every architectural project benefits from grid-based planning. Parametric and computational architecture (Gehry's Bilbao Guggenheim, Hadid's MAXXI Rome) deliberately abandons regular grids in favor of curved structural systems whose geometry is derived from CAD/CAM workflows. Vernacular architecture (adobe, mud-brick, organic accretion) almost never uses a Western-style abstract grid — the dimensions emerge from material, climate, and incremental addition. Use grids when the project's structural logic is repetitive and modular; skip them when the project's design intent is one-of-a-kind.
Who uses Architecture overlays
Frequently asked questions
What is an architecture grid?
An architecture grid is a planning grid drawn over an architectural plan, elevation, or site to organise the placement of structural elements, proportions, and rhythmic relationships. The Structural Grid marks column positions and bay sizes. The Le Corbusier Modulor uses human-scale proportions based on phi and the average human body. The Tartan Grid uses two-direction structural rhythm with alternating wide and narrow bays, common in Renaissance Palladian architecture.
Why use architectural grids?
Architectural grids organise structural decisions before they're committed in built form. Column placement, bay sizes, ceiling rhythm, and window/door modules all need to align coherently — a grid makes that alignment visible and prevents costly mid-construction changes. Modernist architects (Le Corbusier, Mies van der Rohe) made grids central to their design methodology; Renaissance architects (Palladio) used proportional grids derived from classical Roman precedent.
Is the Modulor still used?
Yes, though less prescriptively than in Le Corbusier's lifetime. The Modulor (Le Corbusier, 1948) proposed a universal human-scale proportional system based on the 6-foot human body, phi, and the Fibonacci sequence. Contemporary architects use Modulor proportions selectively rather than as a complete design framework, but the system remains influential — particularly in residential architecture where human-scale ergonomics matter most.
What is the difference between a column grid and a structural grid?
The terms overlap heavily and are often used interchangeably. A column grid describes the lines that locate vertical columns and set the column bay spacing. A structural grid is the broader set of structural grid lines that locate every load-bearing element — columns, beams, and bearing walls — and carries the column-line designations (A1, A2, B1 ...) used to reference positions across a drawing set. In a simple column-and-beam building the two are effectively the same grid.
How do you set out a column grid for a new building?
Start from the structural module your engineer recommends for the span and loading — commonly 8–12m for steel frames and 6–9m for concrete frames. Lay regular grid lines at that spacing in both directions, label them (letters one way, numbers the other), and align major plan elements to the resulting bays. In Grid Maker Pro you can set the structural grid overlay's cell size to match your real module and check the fit against a plan or site photo. Human-scale dimensions then come from the Modulor sequence rather than the column grid.
References
- Le Corbusier. The Modulor: A Harmonious Measure to the Human Scale Universally Applicable to Architecture and Mechanics (1948). English trans. Peter de Francia & Anna Bostock, Faber & Faber (1954); MIT Press (1968). ISBN 978-0-262-62035-7. The source text for the human-scale proportion ladder.
- Le Corbusier. Modulor 2 (Let the User Speak Next) (1955). English trans. Faber & Faber (1958); MIT Press (1968). ISBN 978-0-262-62036-4. The revised system after a decade of built application.
- Palladio, Andrea. The Four Books of Architecture (I Quattro Libri dell'Architettura, 1570). Isaac Ware English ed. (1738); Dover reprint (1965). ISBN 978-0-486-21308-6. Proportional and tartan-rhythm villa plans.
- Vitruvius. The Ten Books on Architecture (De architectura, c. 15 BC). Trans. Morris Hicky Morgan, Harvard University Press (1914); Dover reprint (1960). ISBN 978-0-486-20645-3. Classical module-and-proportion theory.
- Ching, Francis D. K. Architecture: Form, Space, and Order. Van Nostrand Reinhold (1979); Wiley 4th ed. (2014). ISBN 978-1-118-74508-3. Standard treatment of grids and ordering systems in architectural pedagogy.
Notes from the studio · Practitioners on the architecture grids catalogue
Illustrative composites of how the tool gets used in practice — not quotes from named individuals.
Two-point perspective for nearly every facade I document. Phi rectangle for sacred or Romanesque proportion.
Modulor on every residential section drawing. Door, sill, handrail — the proportions land on the ladder.
Tartan grid for structural plans. Column-to-column rhythm before the first line.
Open the architecture overlays
Tartan, structural, Le Corbusier Modulor — every architectural-proportion overlay.
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