Podcast
Questions and Answers
Which of the following gives the safety factor as per Allowable Strength Design for beam columns?
Which of the following gives the safety factor as per Allowable Strength Design for beam columns?
1.7
Beams in a moment resisting frame are considered beam-columns.
Beams in a moment resisting frame are considered beam-columns.
False (B)
What is the correction factor, Cm of a beam-column which is part of a braced frame without any transverse loads resisting equal magnitude of end moments with the same direction?
What is the correction factor, Cm of a beam-column which is part of a braced frame without any transverse loads resisting equal magnitude of end moments with the same direction?
0.2
These are additional secondary moments present on beam-columns when one end of the member translates with respect to the other?
These are additional secondary moments present on beam-columns when one end of the member translates with respect to the other?
When one sag rod is used, the moment about web axis
When one sag rod is used, the moment about web axis
The ratio of the maximum bending moments on weaker axis of purlin without sagrods and with sagrods at 3rd points is nearly
The ratio of the maximum bending moments on weaker axis of purlin without sagrods and with sagrods at 3rd points is nearly
In calculating weak-axis bending strength of beams, shape factor should be limited to this value to prevent excessive working load deformation.
In calculating weak-axis bending strength of beams, shape factor should be limited to this value to prevent excessive working load deformation.
In beam-column analysis, if the ratio of the ultimate compressive load to its design compressive strength is less than 20% then the member is considered more of a
In beam-column analysis, if the ratio of the ultimate compressive load to its design compressive strength is less than 20% then the member is considered more of a
In bi-axial bending, the shear center is always located on an axis of symmetry, thus the shear center will be at the centroid of a cross section with two axes of symmetry.
In bi-axial bending, the shear center is always located on an axis of symmetry, thus the shear center will be at the centroid of a cross section with two axes of symmetry.
What are purlins?
What are purlins?
When a single concentrated load acts normal to the longitudinal axis of the beam but is inclined with respect to each of the principal axes of the cross section, biaxial bending occurs.
When a single concentrated load acts normal to the longitudinal axis of the beam but is inclined with respect to each of the principal axes of the cross section, biaxial bending occurs.
In the analysis of bi-axial bending on purlins, when torsion is considered, only half the crosssection is considered to be effective with respect to its stronger axis.
In the analysis of bi-axial bending on purlins, when torsion is considered, only half the crosssection is considered to be effective with respect to its stronger axis.
If purlins are placed between joints of top chord of the roof trusses, top chord is then considered as what type of member?
If purlins are placed between joints of top chord of the roof trusses, top chord is then considered as what type of member?
A 7.6m restrained beam-column (both ends fixed) carries a uniformly distributed factored load of 67KN/m. An additional axial compressive factored load of 530KN is also applied on the beam-column. Bending is about major axis only. The design compressive and bending strengths are 2940KN and 460KN-m respectively. Fy=248MPa, E=200000MPa and Ix=222x10^6mm^5. Which of the following gives the value of the moment reduction coefficient, Cm?
A 7.6m restrained beam-column (both ends fixed) carries a uniformly distributed factored load of 67KN/m. An additional axial compressive factored load of 530KN is also applied on the beam-column. Bending is about major axis only. The design compressive and bending strengths are 2940KN and 460KN-m respectively. Fy=248MPa, E=200000MPa and Ix=222x10^6mm^5. Which of the following gives the value of the moment reduction coefficient, Cm?
What is the tagalog term for purlins?
What is the tagalog term for purlins?
Two 10mm thick steel plates are to be welded by an E60xx electrode. Based from AISC requirement, what is the minimum size of weld allowed?
Two 10mm thick steel plates are to be welded by an E60xx electrode. Based from AISC requirement, what is the minimum size of weld allowed?
As per code provision, the center to center spacing between bolts is preferably
As per code provision, the center to center spacing between bolts is preferably
_____ is a type of fastener installed by heating to a light cherry-red color, inserting it into a hole and then applying pressure to the preformed head while at the same time squeezing the plain end to form a rounded head.
_____ is a type of fastener installed by heating to a light cherry-red color, inserting it into a hole and then applying pressure to the preformed head while at the same time squeezing the plain end to form a rounded head.
The allowable shearing strength of weld metal is taken 60% of FExx.
The allowable shearing strength of weld metal is taken 60% of FExx.
(True or False) Fillet welds are weaker in shear than in tension and compression.
(True or False) Fillet welds are weaker in shear than in tension and compression.
(True or False) The effective area of fillet welds shall be taken as the effective length times the effective throat thickness.
(True or False) The effective area of fillet welds shall be taken as the effective length times the effective throat thickness.
On a fillet weld, the normal distance from the root to the theoretical face of the weld is called the _____ of the weld.
On a fillet weld, the normal distance from the root to the theoretical face of the weld is called the _____ of the weld.
(True or False). Connecting unusual members such as pipes is easier by welding than by bolting.
(True or False). Connecting unusual members such as pipes is easier by welding than by bolting.
(True or False) The effective area of fillet welds shall be taken as the effective length times the effective size of the weld
(True or False) The effective area of fillet welds shall be taken as the effective length times the effective size of the weld
What is the tensile strength of an E60xx electrode?
What is the tensile strength of an E60xx electrode?
In beam-column analysis, if the ultimate compressive load of the member is 20% of its design compressive strength, which of the following statements is true?
In beam-column analysis, if the ultimate compressive load of the member is 20% of its design compressive strength, which of the following statements is true?
Which of the following is not true about sag rods?
Which of the following is not true about sag rods?
Which of the following is false on moment amplification factor B1 for beam-columns?
Which of the following is false on moment amplification factor B1 for beam-columns?
Which of the following sections below has one or more of its elements in the beam have the possibility of buckling before the beam is able to attain section plasticity?
Which of the following sections below has one or more of its elements in the beam have the possibility of buckling before the beam is able to attain section plasticity?
A 7.6m restrained beam-column (both ends fixed) carries a uniformly distributed factored load of 67KN/m. An additional axial compressive factored load of 530KN is also applied on the beam-column. Bending is about major axis only. The design compressive and bending strengths are 2940KN and 460KN-m respectively. Fy=248MPa, E=200000MPa and Ix=222x10^6mm^5. Which of the following statements is true?
A 7.6m restrained beam-column (both ends fixed) carries a uniformly distributed factored load of 67KN/m. An additional axial compressive factored load of 530KN is also applied on the beam-column. Bending is about major axis only. The design compressive and bending strengths are 2940KN and 460KN-m respectively. Fy=248MPa, E=200000MPa and Ix=222x10^6mm^5. Which of the following statements is true?
A grade 50 WF section (Sx=179000mm^3, Zx=206000mm^3, Sy=18000mm^3, Zy=29000mm^3) is used as a purlin on a roof truss with slope of 4H to 1V. The trusses are spaced at 5.2 meters on centers. There are 6 purlins on the windward side likewise on the leeward side of the truss. The ultimate (factored) roof loads are as follows: Dead load =1.8 KN/m (purlin selfweight included). Live load = 1.5 KN/m, Wind load pressure = 0.25KN/m. Assume purlins are compact section and with no lateral-torsional buckling. Sagrods and tierods are placed at midspan. After checking the adequacy of the purlin, the purlin is SAFE and ADEQUATE! Is it True or False?
A grade 50 WF section (Sx=179000mm^3, Zx=206000mm^3, Sy=18000mm^3, Zy=29000mm^3) is used as a purlin on a roof truss with slope of 4H to 1V. The trusses are spaced at 5.2 meters on centers. There are 6 purlins on the windward side likewise on the leeward side of the truss. The ultimate (factored) roof loads are as follows: Dead load =1.8 KN/m (purlin selfweight included). Live load = 1.5 KN/m, Wind load pressure = 0.25KN/m. Assume purlins are compact section and with no lateral-torsional buckling. Sagrods and tierods are placed at midspan. After checking the adequacy of the purlin, the purlin is SAFE and ADEQUATE! Is it True or False?
When two sag rod is used, the moment about web axis
When two sag rod is used, the moment about web axis
While erecting channel section purlins, it is desirable that they are erected over rafter with their flange
While erecting channel section purlins, it is desirable that they are erected over rafter with their flange
In beam-column analysis, if the ratio of the ultimate compressive load to its design compressive strength is less than 20% then the member is considered more of a __
In beam-column analysis, if the ratio of the ultimate compressive load to its design compressive strength is less than 20% then the member is considered more of a __
Two 12 mm thick steel plates are to be welded by an E60xx electrode. Based from AISC requirement, what is the maximum size of weld allowed?
Two 12 mm thick steel plates are to be welded by an E60xx electrode. Based from AISC requirement, what is the maximum size of weld allowed?
Flashcards
What are purlins?
What are purlins?
Structural members that support roof loads between main supports, typically installed perpendicular to the roof slope.
What are secondary moments?
What are secondary moments?
Additional moments that occur in beam-columns due to the translation of one end of the member relative to the other.
Shear center location in bi-axial bending?
Shear center location in bi-axial bending?
Located on an axis of symmetry; at the centroid in sections with two axes of symmetry
What is a rivet?
What is a rivet?
Signup and view all the flashcards
Beam-column analysis: Low compression?
Beam-column analysis: Low compression?
Signup and view all the flashcards
Fillet weld leg?
Fillet weld leg?
Signup and view all the flashcards
Allowable weld shear strength?
Allowable weld shear strength?
Signup and view all the flashcards
Effective area of fillet welds?
Effective area of fillet welds?
Signup and view all the flashcards
Fillet welds weaker in shear?
Fillet welds weaker in shear?
Signup and view all the flashcards
Top chord between roof truss joints?
Top chord between roof truss joints?
Signup and view all the flashcards
Study Notes
- In beam-column analysis, if the ultimate compressive load is 20% of the design compressive strength, further analysis is needed to determine the specific statement that holds true.
- Need to know the specific safety factor as per Allowable Strength Design for beam columns.
- Beams in a moment resisting frame are considered beam-columns.
- Information is needed to evaluate statements about sag rods and identify the untrue one.
- To determine the correction factor $C_m$ of a braced frame beam-column without transverse loads and resisting equal end moments in the same direction, further information is needed on relevant standards or guidelines.
- Additional secondary moments occur in beam-columns when one end translates with respect to the other.
- With one sag rod, the moment is about the web axis.
- The ratio of maximum bending moments on the weaker axis of a purlin without sag rods to one with sag rods at 3rd points is needed
- To determine the false statement about the moment amplification factor $B_1$ for beam-columns, further information is needed on relevant standards or guidelines.
- When calculating the weak-axis bending strength of beams, the shape factor should be limited to prevent excessive working load deformation.
- In beam-column analysis, if the ratio of ultimate compressive load to design compressive strength is less than 20%, the member is considered more of a beam
- With two sag rods, the moment is about the web axis.
- In bi-axial bending with two axes of symmetry, the shear center is located at the centroid of cross section.
- Purlins are structural members
- When a single concentrated load acts normal to the longitudinal axis of the beam and is inclined with respect to the principal axes, biaxial bending occurs.
- When erecting channel section purlins, they should be erected over the rafter with their flange.
- In bi-axial bending analysis of purlins where torsion is considered, only half the cross-section is effective with respect to its stronger axis.
- Sections with elements in the beam that have the possibility of buckling before the beam attains section plasticity are susceptible to local buckling.
- If purlins are placed between joints of the top chord of roof trusses, the top chord is considered a continuous member.
- A 7.6m restrained beam-column with fixed ends carries a uniformly distributed factored load of 67KN/m and an additional axial compressive factored load of 530KN. Bending is about the major axis only. Design compressive and bending strengths are 2940KN and 460KN-m. $F_y$=248MPa, E=200000MPa and $I_x$=222x$10^6mm^5$. Value of the moment reduction coefficient, $C_m$ .
- A 7.6m restrained beam-column with fixed ends carries a uniformly distributed factored load of 67KN/m and an additional axial compressive factored load of 530KN. Bending is about the major axis only. The design compressive and bending strengths are 2940KN and 460KN-m. $F_y$=248MPa, E=200000MPa and $I_x$=222x$10^6mm^5$. Need to check statement is true
- A grade 50 WF section ($S_x$=179000$mm^3$, $Z_x$=206000$mm^3$, $S_y$=18000$mm^3$, $Z_y$=29000$mm^3$) is used as a purlin on a roof truss with a slope of 4H to 1V. The trusses are spaced at 5.2 meters on centers. There are 6 purlins on the windward and leeward sides of the truss. The ultimate factored roof loads are: Dead load = 1.8 KN/m, Live load = 1.5 KN/m, Wind load pressure = 0.25KN/m. Purlins are compact with no lateral-torsional buckling. Sag rods and tierods are placed at mid-span. The purlin is SAFE and ADEQUATE.
- In beam-column analysis, if the ratio of the ultimate compressive load to its design compressive strength is less than 20%, then the member is considered more of a beam.
- Need to know the tagalog term for purlins
- For two 10mm thick steel plates to be welded by an E60xx electrode, the minimum size of weld allowed based on AISC requirement is needed.
- The center-to-center spacing between bolts is preferably a certain distance per code provision.
- A type of fastener is installed by heating it to a light cherry-red color, inserting it into a hole, and applying pressure to the preformed head while squeezing the plain end to form a rounded head.
- The allowable shearing strength of weld metal is 60% of $F_{Exx}$.
- Fillet welds are weaker in shear than in tension and compression.
- The effective area of fillet welds is the effective length times the effective throat thickness.
- On a fillet weld, the normal distance from the root to the theoretical face of the weld is called the throat of the weld.
- Connecting unusual members such as pipes is easier by welding than by bolting.
- The effective area of fillet welds shall be taken as the effective length times the effective size of the weld
- For two 12 mm thick steel plates to be welded by an E60xx electrode, the maximum size of the weld allowed based on AISC requirement is needed.
- Need to know the tensile strength of an E60xx electrode
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
