Steel Roof Truss Design

Steel Roof Truss Design By : 1.Husain Nur Zharfan F 2. Kiki Setiawan 3. Kreshna !h"a# $ 4. %irna $urna"a S '. *i +u"e,ar

(141144013) (141144017) (141144017) (14114401&) (14114402&)

Definiton Pratt Truss is A type of truss with parallel chords, all vertical members in compression, and all diagonal members in tension. The diagonals slant toward the center.

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Contents

+e"etri! Stru!ture %ateria, a#s (/ye  "*inatin) Stru!ture a,uatin %iss!e,,aneus -ata

Geometric Structure

5m

Material

Material

SNI 03-1729-2002

Mechanical properties of steel : •Modulus of Elasticity E ! 200000 M"a •Shear Modulus # ! $0000 M"a •"oisson%s &atio ' ! 0(3

Table of Mechanical Properties of Structural Steel

S)*&+E: SNI 03-1729-2002

rame Section

.60.60.6

.50.50.7

2.'0.'0.'

Type of !oad

,he load that used on this calculation of this roof truss consist of : 

ead .oad /.



Super ead .oad /S.



.i'e .oad /..



ind .oad /



&ain .oad /.r

!oad Combination

*! 12   1 S./+o45o 1 *! 12   06 .  12 S./+o45o 2 *! 12   0$ 12 S.  1 . /+o45o 3 *! 12   13   12 S.  06 . /+o45o  *! +o45 1  +o45 2  +o45 3  +o45  /En'elope  ! ead .oad . ! .ife .oad S. ! Super I4posed ead .oad  ! ind

!oad of Structure

• Dead Load • Superimposed Dead Load  – Plafond  – Roof 

• Wind Load  – Pressure Wind  – Suction Wind

• Live Load  – worker 

Superimposed "ead !oad #Plafond$ 

ata  istance 5et8een truss  Epanse distance /.  eiht of "lafond +o4ponent

!64 ! 19 4 ! 1$ ;<42



,otal eiht  total ! eiht +o4ponent = istance = . ! 1$ ;<42 = 6 4 = 19 4 ! 1710 ;



eiht "er ?oint ?oint ! 1710 < 9 ! 190 ;

Superimposed "ead !oad #%oof$ 

ata  istance 5et8een truss  istance /o5li@ue  eiht of &oof +o4ponent

!64 ! 1031 4 ! 60 ;<42



,otal eiht  total ! eiht +o4ponent = istance = )5li@ue ! 60 ;<42 = 6 4 = /2  1031 4 ! 6166 ;



eiht "er ?oint ?oint ! 6166 < 11 ! $ ;

Superimposed "ead !oad #Plafond & %oof$

'ind !oad #Press 'ind$ 

ata  istance 5et8een truss  istance /o5li@ue  eiht of ind

!64 ! 1031 4 ! 26 ;<42



,otal eiht  total ! eiht = istance = )5li@ue  &eduction Aactor ! 26 ;<42 = 6 4 = 932 4  00 ! 77326 ;



eiht "er ?oint ?oint ! 77326 < 6 ! 166 ;

'ind !oad #Suction 'ind$ 

ata  istance 5et8een truss  istance /o5li@ue  eiht of ind

!4 ! 1031 4 ! 26 ;<42



,otal eiht  total ! eiht = istance = o5li@ue  &eduction Aactor ! 26 ;<42 =  4 = 1031 4  -0 ! 6166 ;



eiht "er ?oint ?oint ! 6166 < 6 ! 1031 ;

'ind !oad

Pressure Wind and Suction Wind

!ive !oad

eiht

"er ?oint ?oint ! 100 ; ,his .oad Bssin to 2 Coint in 4iddle truss

STRUCTURE EVALUATION 

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Capacity %atio & Misscellaneous "ata

1. 2L.50.50.5 2. L.60.60.6 3. L.90.90.7

• Ma( eflection : -1$$$9 44 D 61 44 • ,otal eiht : 12$199 ; • ,otal +ost : &p1 090 $90

(ase %eactions #)nvelope$

A*ial orce #)nvelope$

58

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Shear orce #)nvelope$

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N 44 +

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Moment #)nvelope$

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N 44 +

"eformed Shape #)nvelope$

# N 44 +

.endutan yan terCadi D .endutan yan diiCinan -1$$$$7 44 D 61 44 );F

Total 'eight & Cost

• ,otal Ara4e • ,otal eiht • ,otal +ost

: 37 fra4es : 2$01 ; : &p9(1(110

i* %oof Truss "esign

• 2.60(60(6 • .0(0( • .90(90(7

! 20 ! 10 !7

,otal ! 37 Ara4es

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Thanks for Attention!

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