Modeling Of Howe Roof Truss 1nv6w

MODELING OF HOWE ROOF TRUSS

60mm

50

10mm

50 60mm

ST- Single Angle from Table ISA 60X60X10 mm 90

90

75

60

LD- Long Edge Connected Back to Back TOP CHORD – 2ISA 75x50x10 mm

SD- Short Edge Connected Back to Back BOTTAM CHORD- 2ISA 90X60X10 mm

OBJECTIVES • Create Skelton Structure of Howe Roof Model • Assign Structural Steel Material

with E=2e8 kN/m², Density =77 kN/m³ • Cross- Sections- Single Angel, Double Angel • Measure The Dimensions – Node to Node Distance, Dimension Beams • Assign Self weight of Truss • Check The Base Reaction.

N3

N1

N2

N=2

N=2

N=5 Connect Beam Along Y axis

Connect Inclined Beam

Manual Calculation Weight of Bottom Chord – 2ISA90X60X10 mm Length of Bottom Chord = 12 m; Density of Steel =77 kN/m³; Area of 2800 mm² = 2800e-6 m² Weight in kN=(2800e-6 )X77x 12 = 2.5872 kN

Weight of Top Chord – 2ISA75X50X10 mm Length of Bottom Chord = 6.325x2 = 12.65 m; Density of Steel =77 kN/m³; Area of 2300 mm² = 2300e-6 m² Weight in kN=(2300e-6 )X77x 12.65 = 2.24 kN

•

Manual Calculation- Cont. Weight of TIE & STRUT– ISA60X60X10 mm Length of Tie (Straight) = 2+(0.667+1.333)x 2 = 6 m; Length of Strut (Inclined) = (2.108+2.404)x 2 = 9.024 m; Total Length = 6+9.024 = 15.024 m Density of Steel =77 kN/m³; Area of 1100 mm² = 1100e-6 m² Weight in kN=(1100e-6 )X77x 15.024 = 1.273 kN Total Steel Weight in Gravity direction (Y Direction )= 2.5872+ 2.24 +1.273 = 6.1 kN (621.81 kgs)