Connection catalogue

The catalogue holds 26 connection models in 7 families. Each one declares how it behaves (simple, semi-rigid or rigid), which forces it transmits, how it is put together on site, and the limit states that usually govern it. The list below is read straight from the engine, so it is the same catalogue the editor offers at a node.

Three things describe a model

Stiffness

How much moment the joint carries before it rotates. Simple joints are meant to rotate; rigid ones are meant not to.

Forces transmitted

V is shear alone, V+N adds axial force, V+N+M adds bending. A model never carries what it does not declare.

How it is joined

Bolted, welded, or welded on one side and bolted on the other, which is the common shop and site split.

The same joint, three intents. The curve is what the stiffness label claims about the steel.

The 26 models, by family

The family is where the connection happens, and it is the first filter the editor applies. A beam-to-column model is never offered at a splice, and a base plate is never offered mid-span.

Beam to column14

Platine de cisaillement sur la semelle du poteauSingle plate (shear tab), column flangeSimpleVBolted and welded

Usually governed by: groupe de boulons (centre instantané de rotation), rupture en cisaillement, soudure sur l'appui

Platine de cisaillement sur l'âme du poteauSingle plate, column webSimpleVBolted and welded

Usually governed by: groupe de boulons, flexion locale de l'âme du poteau

Double cornière sur l'âmeDouble angle (double clip)SimpleVBolted and welded

Usually governed by: boulons dans l'âme de la poutre, rupture par bloc, effet de levier sur les cornières

Platine d'about de hauteur partiellePartial-depth end plate (header)SimpleVBolted and welded

Usually governed by: épaisseur de la platine (maintient l'articulation), soudure poutre-platine

Cornière d'assiseSeated connection (unstiffened)SimpleVBolted and welded

Usually governed by: plastification locale de l'âme (J10.2), enfoncement local (J10.3), flexion de la cornière

Platine d'about affleurante (flush)Flush end plateSemi-rigidV+N+MBolted and welded

Usually governed by: tronçon en T de la semelle, effet de levier (prying), zone de panneau

Cornières supérieure et d'assiseTop and seat anglesSimpleVBolted and welded

Usually governed by: plastification locale de l'âme (J10.2), enfoncement local (J10.3), flexion de l'assise

Platine d'about débordanteExtended end plate (4E/4ES/8ES)RigidV+N+MBolted and welded

Usually governed by: tronçon en T, zone de panneau du poteau, raidisseur de continuité

Platines de semelleBolted flange plate (BFP)RigidV+N+MBolted and welded

Usually governed by: traction dans la platine de semelle, zone de panneau

Soudure directe des semellesWelded unreinforced flange (WUF-W)RigidV+N+MWelded

Usually governed by: groupe de soudure excentré, zone de panneau

Platine de tête de POTEAUColumn cap plateSimpleVBolted and welded

Usually governed by: enfoncement local de l'âme de la poutre sous l'effort concentré, flexion de la platine, soudure en tête de poteau

Platine de tête de poteau avec RAIDISSEURSStiffened column cap plateRigidV+N+MBolted and welded

Usually governed by: flexion du raidisseur entre les semelles du poteau, traction dans le boulon par le couple du moment, flexion de la platine sous le boulon, soudure du contour sous N et M

Jarret verticalHaunched connection (vertical)RigidV+N+MBolted and welded

Usually governed by: section variable, déversement du tronçon de jarret

Jarret horizontalHaunched connection (horizontal)RigidV+N+MBolted and welded

Usually governed by: section variable, déversement du tronçon de jarret

Beam to beam4

Platine de cisaillement sur l'âme de la poutre principaleSingle plate to girder webSimpleVBolted and weldedcoped beam

Usually governed by: flexion au grugeage, rupture par bloc au grugeage, groupe de boulons

Double cornière sur poutre principaleDouble angle to girderSimpleVBolted and weldedcoped beam

Usually governed by: flexion au grugeage, effet de levier (prying), rupture par bloc

Cornière de pannePurlin cleat (clip angle to purlin web)SimpleVBolted

Usually governed by: pression diamétrale sur l'âme pliée, déchirure de l'âme pliée, flexion de l'aile

Platines de semelle sur poutre principaleBolted flange plates to girder (moment beam-to-girder)RigidV+N+MBolted and weldedcoped beam

Usually governed by: traction dans la platine de semelle, poutre avec semelle percée (F13.1), flexion et voilement au double grugeage, double cisaillement des boulons d'âme

Splices3

Épissure au cisaillement seulShear splice (web plates)SimpleVBolted

Usually governed by: groupe de boulons excentré, rupture par bloc dans les couvre-joints

Épissure de momentMoment splice (flange + web plates)RigidV+N+MBolted

Usually governed by: couvre-joints de semelle en traction, aire nette, glissement

Faîtage (arbalétrier-arbalétrier)Apex connectionRigidV+N+MBolted and welded

Usually governed by: platine d'about inclinée, tronçon en T

Column bases2

Pied articuléPinned base plateSimpleV+NBolted and welded

Usually governed by: écrasement du béton, flexion de la platine, ancrage dans le béton

Pied encastréFixed (moment) base plateRigidV+N+MBolted and welded

Usually governed by: bloc de pression, traction dans la tige d'ancrage, flexion de la platine

Truss joints2

Nœud de treillis avec goussetTruss gusset connectionSimpleV+NBolted and welded

Usually governed by: section de Whitmore, flambement du gousset, traînage de cisaillement

Nœud de treillis avec gousset soudéWelded truss gusset connectionSimpleV+NWelded

Usually governed by: cordon sur la diagonale, section de Whitmore, rupture par bloc

Bracing1

Gousset de contreventementBracing gusset (UFM)SimpleV+NBolted and welded

Usually governed by: méthode de la force uniforme (UFM), Whitmore, interface gousset-poutre

Tubular (HSS)1

Nœud tubulaire T/YHSS T/Y jointRigidV+N+MWelded

Usually governed by: plastification de la face de la membrure (chap. K), poinçonnement

What each engine was checked against

Every engine declares the published example it was reproduced against, and an automated test opens the stored reference and fails if the citation is not there. A declaration without a reference does not ship. The sources in use today:

AISC Design Examples V14.1, for single plates, double angles, header plates, seated angles, flange plates and web splices.
AISC Design Guide 1, for base plates under uniform bearing pressure.
AISC Design Guide 4, for extended end plates, and by extension for apex and haunched joints.
AISC Design Guide 16, for flush end plates.
AISC 360 chapters J and K, for welds, gussets, block shear and HSS face plastification.
AISI S100-16 with S3-22, chapter J, for the purlin cleat on cold-formed webs.

Where no solved example exists in the public literature, the engine says so in its own readiness note rather than implying an example nobody opened. Gussets, welded truss gussets and the tubular T/Y joint are in that group: the formulas are the code equations, but the numbers were never matched against a published worked example.

A model appearing in this catalogue does not mean it will be offered at every node. See how the editor filters the catalogue for one node.