If the thickness of thinnest outside plate is 10 mm, then the maximum pitch of rivets in tension will be taken as
Maximum pitch of rivets in tension = 16t or 200 mm whichever is less,
∴ Pitch = 16 x 10 = 160 mm
When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which.
where, Fa is the load shared by each rivet due to axial load and Fm is the shearing load due to moment in any rivet
The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is
= Nominal diameter + 1.5 mm, φ≤ 25 mm
= Nominal diameter + 2 mm, φ > 25 mm φ = Nominal diameter
If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin’s formula will be
According to Unwin’s formula nominal diameter of rivet is given by,
According to IS Specifications, the maximum pitch of rivets in compression is
(where t is thickness of thinnest outside plate or angle)
Maximum pitch of rivets in compression = 12t or 200 mm whichever is less
Which one of the following is the mode of failure in a fillet weld material?
Load on connection is not eccentric for
In the case of double cover butt joint, eccentricity of force does not exist and bending is eliminated whereas it exists in the case of lap joint.
Match List-I (Failure mode) with List-II (Reason) and select the correct answer using the codes given below the lists:
A. Shear failure of plates
B. Bearing failure of plates
C. Tearing failure of plates
D. Splitting failure of plates
1. Insufficient edge distance
2. Strength of plate is less than that of the rivets
Possible failures of Bolted connection:
1. Tension failure of plate
2. Bearing failure of bolt
3. Shear failure of bolt
4. Shear failure of plate
5. Splitting failure of plate
6. Bearing failure of plate
Out of the above given failures, the last three failures i.e. shear failure, splitting failure and bearing failure of plate are occurred due insufficient end distance and can be prevented by providing proper end distance. For the first 3 failures, we need to design bolted connection.
The centre to centre maximum distance between bolts in tension member of thickness 10 mm is
The distance between centres of two adjacent rivets, in a line lying in the direction of stress, shaff not exceed 16t or 200 mm, whichever is less in tension members and 12t or 200 mm, whichever is less in compression member
∴ c/c distance = Lesser of (16 x 10, 200)
The type of stress induced in the foundation bolts fixing a column to its footing is
The axial force from column needs to be transferred from column to footing and thus, mainly type of stress induced in the foundation bolts is pure tension.