Table of Contents
- 1 What is lacing column?
- 2 Why lacing is provided in the columns?
- 3 What is single lacing and double lacing?
- 4 How many types of column are there?
- 5 What is minimum slenderness ratio for designing a laced System column?
- 6 What is the allowable slenderness ratio of lacing bar in a column 1 point?
- 7 How do you find the effective length of a lacing member?
- 8 What is the maximum spacing between two lacing bars?
- 9 What is the effective slenderness ratio of laced columns?
- 10 What is the minimum diameter of lateral ties in column?
What is lacing column?
Laced Columns: Lacing consists of connecting the components of the column by a system of generally flat plates. (In some cases angles and channels are also used as lacings). Lacing plates may be 50 mm to 75 mm wide and 8 mm to 10 mm thick.
Why lacing is provided in the columns?
1. A system of members (e.g., bars or batten plates) used to connect two component elements of a composite girder, strut, or column to make them act as one member.
What is the maximum slenderness ratio of lacing bars in built up columns?
The slenderness ratio of the lacing bar for the compression members shall not exceed 145.
What is single lacing and double lacing?
Single lacing system 2. Double lacing system. 3. The compression member comprising two main components laced and tied should, where practicable, have a radius of gyration about the axis perpendicular to the plane of lacing not less than the radius of gyration at right angles to that axis.
How many types of column are there?
These four types of columns were Doric, Ionic, Corinthian, and Tuscan. These columns look straight and uniform from a distance.
What is the difference between lacing and bracing?
What is the difference between lacings and battens in a column bracing system? – Quora. The main difference is in the purpose for which they are provided-Lacing flats carry no force but their sole purpose is to prevent buckling of column while Battens along with to check buckling plays a role in force transfer.
What is minimum slenderness ratio for designing a laced System column?
Explanation: Slenderness ratio is the ratio of effective length by radius of gyration. Slenderness ratio of lacing shall not exceed 145. 5.
What is the allowable slenderness ratio of lacing bar in a column 1 point?
145
Slenderness ratio of lacing shall not exceed 145. 5.
IS 800 1871 lacing bars resist transverse shear equal to?
According to I.S. : 800 – 1871, lacing bars resist transverse shear equal to. E. 4.0\% of the axial load.
How do you find the effective length of a lacing member?
Explanation: Effective length shall be taken as length between inner end bolts/rivets of bars for single lacings and 0.7 times length between inner end bolts/rivets of bars for double lacings.
What is the maximum spacing between two lacing bars?
The maximum spacing of lacing is depended on the factors like spacing of two member which are joined together to form built-up section ,angle of inclination of lacing bar and properties of main member which are being laced together. In this a1 is vertical spacing between two lacing . in this case a is a1.
What is the maximum spacing of reinforcement in column as per code?
maximum spacing of reinforcement in column as per is code Normally these spacing will be as mentioned below : For beams, these distances are 300 mm, 180 mm and 150 mm for grades of main reinforcement of Fe 250, Fe 415 and Fe 500, respectively. (ii) The maximum spacing between two secondary parallelbars shall be 5dor 450 mm or whichever is less.
What is the effective slenderness ratio of laced columns?
(iv) The effective slenderness ratio (KL/r) e of laced columns shall be taken as 1.05 times the (KL/r) o, the actual maximum slenderness ratio, in order to account for shear deformation effects.
What is the minimum diameter of lateral ties in column?
Spacing of longitudinal bars measures along the periphery of a column should not exceed 300mm. It maybe in the form of lateral ties or spirals. The diameter of the lateral ties should not be less than 1/4 th of the diameter of the largest longitudinal bar and in no case less than 6mm.