//script builds, supports, and loads a steel beam
//then finds the lateral bracing required to pass design checks

SetUnits("Kips & Inches");
DeleteAll();

//input
var w = 25*12;
var beamSection = "W14x22";
var beamMat = "ASTM A992 Grade 50";

//define nodes
var n1 = AddNode(0, 0);
var n2 = AddNode(w, 0);

//define member
var beam = AddMember("beam", n1, n2, beamSection, beamMat);

//pin the supports
Support(n1, true, true, true, true, false, false);
Pin(n2);

//load to the beam
LoadMember("D", beam, -0.25/12, "Force Y");
LoadMember("L", beam, -0.5/12, "Force Y");
LoadMember("S", beam, -0.35/12, "Force Y");

//find the beam's design group
await DesignGrouping();
var group = FindGroup(beam);

var bracing = new string[] { "Midpoint", "Third Points", "Quarter Points", "Continuous" };
foreach(var brace in bracing)
{
    ModifyDesignGroup(group, "Bracing", "Lateral Top (+y)", brace);
    await Design();
    var unity = Unity(beam);
    if(unity <= 1.0) { return $"{brace} bracing leads to a unity value of {unity}"; }
}
return "No bracing configurations satisfied the design checks.";