DESIGN OF BRACKET

DESCRIPTION SYMBOL UNITBRACKET WIDTH a MMBRACKET HEIGHT h MMLOAD REACTION POINT PROJECTION L2 MMTOP PLATE THICKNESS tt MMBOTTOM PLATE THICKNESS tb MMGUSSET PLATE THICKNESS tg MM

A

YIELD STRENGTH fy

ALLOWABLE BENDING STRESS = 0.66 * fy fba

ALLOWABLE TENSILE STRESS fta

ALLOWABLE SHEAR STRESS = 0.4 * fy fbs

LOAD CARRYING CAPACITY W KGNUMBER OF BRACKETS N NOS.LOAD PER BRACKET = W / N F KGBENDING MOMENT = F * L2 M KG-MM

fb

SHEAR STRESS IN BRACKET = F / A fs

MOMENT OF INERTIA OF BRACKET @ X-X AXIS = a*h3/12 - (a-tg)*(h-tt-tb)3/12

IXX MM4

SECTION MODULUS OF BRACKET @ X-X AXIS = IXX / (h/2)

ZXX MM3

CROSS SECTIONAL AREA OF BRACKET = a*tt + a*tb + tg*(h-tt-tb)

MM2

KG/MM2

KG/MM2

KG/MM2

KG/MM2

BENDING STRESS IN BRACKET = M / ZXX KG/MM2

KG/MM2

VALUE