LSF (Light Steel Framing)

Market and catalog

In the new project wizard, the 9 x 7 m house gets sections, steel, spacing, loads and wind without anyone typing a number: what fills them in is the project market, the Brazil · NBR 14762 chip in the header. Here you see what the catalog brings for each country, what a country inherits from Brazil and why the Finish button sometimes reads N missing.

Overview

One country, one package of defaults

An LSF project does not start blank. Before the first wall, the project needs a section for each of the 14 roles (stud, track, header, floor joist, chord, purlin and the others), a steel, a stud spacing, the board loads and a wind standard. In CalcSteel all of this arrives together, in one package per country: the project market.

The package comes from the CalcSteel catalog. It also carries what comes later: the screws of each joint, the sheathing boards, the roll-forming machines and the files they read.

For the example house the answer is short: the market is Brazil, the only one with all 14 roles defined. This page shows the rest because the question comes up. A client with a project abroad, an IP that says somewhere else, a colleague who changed the chip by accident. Knowing what each country brings keeps you from calculating with a default that does not exist.

  • 4: markets with their own package: Brazil, United States, Australia and New Zealand
  • 14: section roles; only Brazil defines all 14
  • 2: roles defined in the other three: stud and track
  • 0: fields to fill in on the example house, in Brazil
QuestionShort answer
Wherein the chip at the top of Project settings; click it to see the markets
Who choosesyour last choice; otherwise the country of your internet connection; otherwise the one on your account
Country without a rowinherits the whole Brazil package
N missingfields the market does not define and the project does not fill in by itself
In the calculationsections, steel, loads and wind go in; the member check follows the project design standard

What it is for

From the catalog to the project settings

The market answers a question the engineer asks without noticing: what is sold and built here? In Brazil, the 90 mm stud in ZAR steel, the 400 or 600 mm module, the 11.1 mm OSB board and the 4.2 x 19 mm pan head screw. In the United States, another family of sections, another steel, another spacing. CalcSteel keeps these answers in the catalog, one package per country, and hands each project the package of its country.

From the catalog to the project: the country package fills in sections, steel, loads and wind; what it does not bring, the project asks for
Part of the catalogWhat it gives the project
market conditionsthe country row: section per role, steels, spacing, maximum bar, ceiling height, loads, pieces, joints, sheathing and standard details
sectionsthe sections with the LSF mark of the country standard, and the ones the row cites (the Brazilian hat section and strap)
screws and anchorsscrews and anchors by country, each with its declared source
machines and filesthe roll-formers, the sections they form and the file format they read
joint modelsthe drawing of the wall joint for each fabrication

Price is not included. The catalog carries no price: the price of a section belongs to the company, and stays out of the package.

What the standard says

Steel, module and wind change from country to country

In the market, the standard is a variable like the section: each country has its own. The Brazil row declares NBR 14762, the Brazilian standard for cold-formed steel design; the United States row declares AISI S100; Australia and New Zealand, AS/NZS 4600. What changes with it, in practice, is the steel you can use, the module the market sells and the wind standard. The examples use only the Brazilian standards.

NBR 14762:2010 · 4.1.1.

Steel for cold-formed sections, to enter the calculation, needs an fu/fy ratio of at least 1.08 and an elongation of at least 10 % in 50 mm, or 7 % in 200 mm.

NBR 14762:2010 · 4.1.2, Table 1.

The table lists the steels with structural qualification, among them ZAR 250, 280, 320, 345 and 400. Steels with fy below 250 MPa do not appear in it.

NBR 14762:2010 · 4.1.3.

Steel outside Table 1 may be used as long as it meets 4.1.1.

NBR 14762:2010 · 4.2.

Steel without structural qualification only enters with fy of at most 180 MPa and fu of at most 300 MPa.

The default ZAR-230

The default steel in Brazil is ZAR-230, with fy 230 and fu 310 MPa. It is not in Table 1: it enters through 4.1.3, because fu/fy = 310/230 = 1.35, above 1.08. The Brazil row declares NBR 15253, the Brazilian standard for galvanized LSF sections, as the source of its steel list.

The module

The 400 or 600 mm spacing in Brazil comes from a product study declared in the row itself, and matches the 1.20 m board. The United States uses 305, 406 and 610 mm, which are 12, 16 and 24 inches. Australia and New Zealand, 450 and 600 mm.

MarketDeclared standardWindDefault steel
BrazilNBR 14762NBR 6123ZAR-230 · fy 230 / fu 310 MPa
United StatesAISI S100ASCE 7-22A1003 Type H · fy 228 / fu 310 MPa

The chip standard is the country's; the calculation standard is the project's. The market brings sections, steel, spacing, loads and wind. The member check follows the project design standard, and the LSF checks of their own follow NBR 16970-2, the Brazilian light steel framing standard, and NBR 14762 (see What the engine does).

The 9 x 7 m house

Brazil, and nothing to fill in

The 9 x 7 m single-story house, with a 2.80 m ceiling height, is in Brazil. The header chip reads Brazil · NBR 14762, the fabrication is Roll-formed on the FRAMECAD F325iT and the button at the end of the settings reads Finish: the market left no field empty.

The header of Project settings on the example house: the market chip on top, the fabrication model and the machine below.
The header of Project settings on the example house: the market chip on top, the fabrication model and the machine below.

What the Brazil row puts in the house, role by role. In a roll-formed project, the roles the machine forms get its section on top of the market: that is why the stud comes out as the 89 mm FRAMECAD section, and not the C 90 of the Brazilian catalog.

RoleBrazil rowIn the house (FRAMECAD)
Stud, trackC 90x40x12x0.95 · U 92x38x0.95C 89x41/39x12x0.95
HeaderC 200x40x12x1.25C 89x41/39x12x1.15
Blocking, gable, ridgeU 92x38x0.95C 89x41/39x12x0.95
Chord, hipC 90 and C 140, 0.95C 89x41/39x12x0.95
Truss web memberC 90x40x12x0.80C 89x41/39x12x0.75
BracingRET 50x0.95 strapRET 50x0.95 strap
Floor joist, floor track, rim closureC 200 and U 202, 1.25same as the row
Purlinhat section 30x40x12x0.95hat section 30x40x12x0.95
  • 600 mm: default spacing
  • 6000 mm: maximum bar for track and stud
  • 2.80 m: default ceiling height
  • 0: missing fields: Finish enabled

Step by step

1. See where the chip came from

In a new project the market arrives by itself, in this order: the last choice made in this browser; the country of your internet connection; the country on your account. The first answer that exists wins. The choice is stored in the browser, so whoever changed the chip once sees the same country in every new project from then on.

2. Click the chip

The Project market list opens. Each row shows the country, the declared standard, the accepted spacings and the steels. The list has only the countries with their own package: Australia, Brazil, New Zealand and the United States.

Brazil in the Project market list: the standard, the accepted spacings and the steels of the row.
Brazil in the Project market list: the standard, the accepted spacings and the steels of the row.

3. Choose another country, if needed

A project with no walls switches at once. A project with members asks for confirmation first: it says how many members change section and how many stay as they are because the new market has no section for their role, and warns that spacing, steel, loads and wind standard change too. One Ctrl+Z undoes the whole switch.

4. Switch to the United States and open Structure

The United States row defines only two roles: track and stud, in the SSMA family. The other twelve turn amber with no default for this market: choose, and the tab gets the orange dot with 12. The steel becomes A1003 Type H and the spacing, 406 mm.

The United States in Roll-formed on the FRAMECAD. Stud and track come from the machine; each amber row asks you to choose the section for that role.
The United States in Roll-formed on the FRAMECAD. Stud and track come from the machine; each amber row asks you to choose the section for that role.

Look at the right side: the maximum bar and the whole sheathing (OSB 11.1 mm, fiber cement 10 mm, gypsum ST 12.5 mm) are the Brazilian ones. The United States row does not define these fields, and the project inherits them.

5. Change to Stick-built and go back to Structure

Without the machine on top, you see what the market really brings: 362S162-33 for the stud and 362T125-33 for the track, and nothing else. Changing the model sends the settings back to the Building envelope tab; go back to Structure to see the sections.

The United States in Stick-built. The project does not calculate with another country's section: a role with no market section stays empty.
The United States in Stick-built. The project does not calculate with another country's section: a role with no market section stays empty.

6. The button at the end reads 12 missing

On any tab, the Finish button turns gray and changes its text: 12 missing. Hover over it and the tip reads in full: "12 fields missing that the project market does not define". Changing the steel in the picker does not change the count, because the twelve missing fields are sections. The wind standard, here, came from the market: ASCE 7-22, with the United States map.

Wind action in the United States. The corner button shows 12 missing.
Wind action in the United States. The corner button shows 12 missing.

Country without a row: inherits Brazil, except the wind

The picker list has four countries, but the project can arrive with any other: through the internet connection of whoever opened it, or through the country on the account. Take Spain, which has no package of its own. It inherits the whole Brazil package: the 14 roles, the ZAR steels, the 600 mm spacing and the loads. Only one thing does not come along.

7. Open Wind action

The wind standard is not inherited: it is the one of the project country, and EN 1991-1-4, which covers all of Europe, does not come in by itself. The Standard field turns amber, with choose the standard, and the button reads 1 missing.

Spain. Standard empty, 1 missing.
Spain. Standard empty, 1 missing.
EN 1991-1-4 chosen: the button goes back to Finish.
EN 1991-1-4 chosen: the button goes back to Finish.

8. Choose the standard, then check the V₀

Choosing the standard clears the missing field. Next, check the V₀ and enter the one for the project site: the EN map shows Europe between 22 and 32 m/s. The pressure in the blue box follows the chosen standard and V₀.

Standard and V₀ go together. Choose the standard first, then the V₀, and only then read the pressure in the blue box.

Shortcuts

  • CFG↵

    Project settings

    Opens the project wizard: envelope, structure, loads and wind.

  • 2

    Structure tab

    Goes straight to the Structure tab of the wizard.

    in the project wizard

  • 4

    Wind tab

    Goes straight to the Wind tab of the wizard.

    in the project wizard

  • Ctrl+Enter

    Next or finish

    Goes to the next step. On the last one, finishes.

    in the project wizard

The catalog, table by table

Brazil and the United States side by side

Everything on this page was read from the CalcSteel catalog in October 2026. A field marked BR is inherited from Brazil.

FieldBrazilUnited States
Declared standardNBR 14762AISI S100
Roles with a section14 of 142 (SSMA)
Sections in the catalog32283
SteelsZAR 230, 250, 280, 345A1003 H, A653 SS33, SS50
Spacings (mm)400, 600305, 406, 610
Default spacing600406
Default ceiling height2.80 mBR
Loads, maximum bardefinedBR
Sheathing, standard details, piecesdefinedBR
WindNBR 6123ASCE 7-22
Own screws62

Inheritance, the rule

A country without a row receives the whole Brazil row. A country with an incomplete row is completed field by field; pieces and joints, item by item. The section per role is not inherited: a role with no section from the country stays empty and counts as missing.

The catalog section

In Brazil, 15 C sections (90, 140 and 200 mm) and 15 U sections (92, 142 and 202 mm), from 0.80 to 2.00 mm, plus the hat section and the strap the row cites. In the FRAMECAD, Howick and SSMA sections, the catalog thickness is already the base steel, without the zinc.

Project units. In any market, the project works in millimeters: spacing, section and dimension.

Machines, files, details and screws

MachineSections it formsFileNote
FRAMECAD F325iTC 89x41/39x12 in 0.55, 0.75, 0.95 and 1.15 mmFRAMECAD Detailer CSVmachine of the new project; default sections per role
Howick FRAMA 320027 Howick sections, from 45 to 150 mm, in 0.75, 0.95 and 1.15 mmHowick v113 and 34.1 mm holes

The machine is the same in any market; its sections come in on top of the market in the roles it forms.

CountryScrews and anchors in the catalog
Brazilpan head 4.2 x 19 · hex head 4.8 x 19 · bugle head 3.5 x 25 and 4.2 x 32 · wing tip 4.2 x 32 · Glasroc 3.5 x 35, each with a manufacturer or course handout as source
United States#8 pan head · 1/2" anchor
Australia, NZ10g hex head

Brazilian joints, as they are in the catalog.

T, X and corner joints: 4.8 x 19 hex head screw in the web, staggered, every 200 mm. Track splice: 4.2 x 19 pan head, 4 per side, 150 mm lap. Stud in track: pan head, in the flange, 2 per end. The declared source is a course handout. In a roll-formed project, the wall joint follows the machine model (FRAMECAD default).

Common mistakes and refusals

When the button reads N missing

"N missing" counts the fields the market did not define and you have not filled in yet. Each missing field lives on a tab, which gets the orange dot with the number. Filling in the field clears it at once. On a new roll-formed project on the FRAMECAD:

Project marketMissingWhat, and where to fill it in
Brazil0nothing
India (no row)0inherits Brazil, and IS 875-3 lists India
United States12section for 12 roles · Structure
Australia, New Zealand12section for 12 roles · Structure
Spain, Portugal, Argentina, Mexico, Chile1wind standard · Wind action
  1. I changed the steel and the number did not drop. The steel only clears a missing steel. Missing sections go away one by one, role by role, on the Structure tab.
  2. Every new project opens in another country. The last choice in the picker is stored in the browser and wins over the internet country and the account country. Change the chip back once: the new choice takes over.
  3. I switched countries and want to go back. A market switch is a single Ctrl+Z step: it brings back sections, steel, spacing, loads and wind as they were. After switching, read the Structure tab again.

The countries that are not on the list

Only four countries appear in the picker. A fifth country only reaches the project through the internet connection of whoever opened it or through the account country, and then it inherits Brazil. That has two readings, and both matter to the engineer:

What inheritance guarantees

The project is never left without sections, steel, loads or joint rules. Every country receives a complete package, and the project opens ready to draw.

What to check

That this package is sold in the country. A project in Portugal opens with Brazilian sections, ZAR steel and screws, and Finish only asks for the wind standard. Check section, steel and screw with the local supplier.

Project outside Brazil: check the package with the local supplier. The picker brings four markets; in the ones outside Brazil, stud and track are the country's, and the rest of the row comes from the Brazilian package. Replace whatever the local supplier does not sell.

Message on screenWhen it appears
Detecting the market…new project, while the catalog arrives
Market not setamber chip: the project has no country yet
We could not tell your countryno saved choice, no country from the internet connection and no country on the account; choose from the list
Could not read the catalogthe connection failed; try again

An old project, saved before the market existed, opens as Brazil and with nothing missing. The market is not recalculated on opening: the project keeps the country and the missing fields it had.

What the engine does

The market fills in; the calculation reads the settings

The market acts once, when the project receives the package or switches country. It writes numbers into the project settings. From then on, the calculation reads the settings as they are, and does not ask which country they came from.

From the marketDoes it reach the calculation?
Section of each roleyes it is the section of the drawn members
Steelyes fy and fu of the members
Spacing, maximum bar, ceiling heightyes through the geometry the drawing generates
Board loadsyes loading of the walls and the ceiling
Wind standardyes the wind pressure
Joints, sheathing, standard detailsyes in the tools that draw the pieces
Declared standard on the chiplabel identifies the country; the calculation follows the project design standard

NBR 16970-2:2022 · 7.2.

It is the reference that the restraint checks of the LSF engine declare, in any market.

NBR 14762:2010 · Annex D, Table D.2.

Web crippling by D.2. The only row that comes from outside is the one for the plain U with the flange connected, which D.2 does not have: the engine uses the equivalent AISI S100 table, and the coefficients match those of D.2.

Shortcuts

  • Ctrl+Enter

    Calculate the project

    Sends the project to the engine, like the Calculate button.

Summary

The path, in one line

Project settings → header chip → check the country → if it is another, choose it from the list → Structure: choose the section for each amber row → Wind action: choose the standard and the V₀ of the site → Finish.

The example so far

  • BR: project market
  • 14: roles with a section
  • 230 MPa: fy of ZAR-230
  • 0: missing fields