1)  INTRODUCTION
2)  MORE INFO
3)  AUTHOR
4)  PRICES
5)  ORDERS
6)  TECHNICAL CARD

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CLASS4 is a new program dealing with the class 4 cross-sections effective properties calculation: effective area, Aeff, effective bending resistance moduli, Weff. The program is the outcome of years of study and work about class 4, and presents the results obtained studying and researching about cold formed cross-sections and about steel cross-section classification.
The following publications are examples of the research done about cross-section classification and about cold-formed cross-sections:

► P. Rugarli, Classification of I- or H- shaped cross-sections under mixed internal actions, Journal of Constructional Steel Research, 65, 1597-1606, 2009

► C. Bernuzzi, P. Rugarli, Prediction of the load carrying capacity of slender cross-section members under eccentric load, part 1: the approach, Costruzioni Metalliche, 5, 2009

► C. Bernuzzi, P. Rugarli, Prediction of the load carrying capacity of slender cross-section members under eccentric load, part 2: the validation, Costruzioni Metalliche, 6, 2009

► P. Rugarli, Calcolo di Strutture in Acciaio, EPC LIBRI, ROMA 2008

► P. Rugarli, Strutture in acciaio. La classificazione delle sezioni. Commento all'Eurocodice 3, EPC LIBRI, ROMA 2007

The effective properties evaluation is a very complex problem still partly under research done by experts. CLASS4 exposes to a wide public very complex algorithms referring to the evaluation of 19 cross-section types among the most frequent, as I rolled, C, L, Z and Hat cold-formed, with simple or double stiffener fold.

CLASS4 is the reduced version of a more general software, which is able to manage generic cross-sections. If cross-section types not falling within those considered by CLASS 4 are needed, you may ask to Castalia srl a computing service, referring to the cross-sections of interest.

CLASS4 is especially useful to steel structures designers, using cold formed cross-sections ( thin walled) or cross-sections that are in CLASS 4.

CLASS4 evaluates the effective properties according to the following standards:

► EN 1993-1-3  (Eurocode 3, supplementary rules for cold formed thin gauge members and sheeting)
► EN 1993-1-5 (Eurocode 3, supplementary rules for planar plated structures without transverse loading)
► D.M. 14 gennaio 2008 (NTC 2008)
► Circolare n. 617, C.S.LL.PP.
► D.M. 17 gennaio 2018 (NTC 2018)


CLASS4 computes many useful properties of the cross-sections, and referring to the cross-sections of the types enumerated (see technical card below) it computes:

► the effective area, A_eff;
► the difference of the positions of the gross cross-section center, and of the effective cross-section center (e_Ny, e_Nz);
► the bending resistance modulus for positive bending around axis y, W_eff,y,p;
► the bending resistance modulus for negative bending around axis y, W_eff,y,m;
► the bending resistance modulus for positive bending around axis z, W_eff,z,p;
► the bending resistance modulus for negative bending around axis z, W_eff,z,m;

so allowing to evaluate the formulae using these properties in order to check the resistance and stability of members.

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HTML GUIDE OF THE SOFTWARE (Copyright: all rights reserved)

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DOWNLOAD DEMO: 2 DAYS DURATION (Copyright: all rights reserved)

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The author of CLASS4 is Paolo Rugarli.

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CLASS4 is given in electronc format (internet download).

The normal cost for end-user is 240€ or 240$ depending on the Country: Euro is for Europe, Middle East and Asia including Japan, USD is for all other Countries (Americas, Australia and Africa)

The program is software protected (activation), and may be transferred from one computer to another.

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Who wants CLASS4 must order it by compiling personal and invoice data in the form obtained by following the link below.

Once the program has been ordered, it will be necessary to pay in advance by using two methods:

1. Using PAYPAL by the page got from link below (to be clicked after issuing the order).¹

   PAYPAL EURO PAYMENT (VISA, MASTERCARD,etc.): Europe, Middle East, Asia

   PAYPAL USD PAYMENT (VISA, MASTERCARD,etc.): Americas, Australia, Africa

2. By bank transfer using the following bank account:
   Unicredit Banca, Ag. Via Stradella Milano
   CC n. 2799059 Castalia srl
   BIC SWIFT CODE: UNCRITM1223
   IBAN: IT 22H 02008 01623 00000 2799059
   cause "CLASS4".
   
   

¹ If you use PAYPAL and the name on the credit card is not the same of the name input for the order, set as email address given to PAYPAL the same email address used for the order.

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Producer and Distributor	Castalia s.r.l.
Operating Systems	Windows 32 and 64 bit
Hardware requirements	Those of the operating system
Managed cross-section types:	IPE, HEA, HEB, HEM, H or I rolled, T cut from H or I rolled, H or I welded (equal or unequal flanges), T welded, C welded, RHS (rectangular hollow sections), rectangular box, hat cold formed with one or two folds, C cold formed with one or two folds, L cold formed with one or two folds, Z cold formed with one or two folds.
Program versions	English and Italian
Protection	software, PC locked
Software feature	Hyper text help, context sensitive help, tool tip, transferring of images to the clipboard. Guide CHM, guide PDF, on line guide HTML.