How are steel column connected to the footing?
In columns with rigid column-footing connection, the column base plate is connected to the RC pedestal by anchor bolts designed to resist both the design gravity and lateral loads. When a vehicle collides with the first story steel column, the column-pedestal joint tends to be the weakest link in the whole structure.
What is the maximum distance between main steel bar in a slab?
What Is The Maximum Bar Spacing In Slab As Per IS-Code? In the case of the RCC slab, the maximum spacing between the two parallel main reinforcement bars should be 3D or 300 mm or whatever. In the case of the RCC slab, the maximum spacing between two secondary parallel wires should be 5D or 450 mm or whatever.
How do the steel columns are connected to the concrete foundation?
The steel column is connected to a base plate, which is attached to the concrete foundation by some form of so-called “holding down” assembly.
How much reinforcement is required at the interface between the columns?
The amount of reinforcement that is required at the interface between a column or wall and the footing depends on the type of stress in the longitudinal bars of the supported member under all applicable load combinations. Dowels are commonly used as interface reinforcement between columns or walls and footings.
What are isolated footings for columns?
When there are individual footings for columns they are called isolated footings. In somecases, it may not be possible to provide such isolated footings-may be because the columns are at closer spacing or due to the low value of the safe bearing capacity of the soil. In such cases two or more columns in a row may be combined to provide footing.
Should reinforcing bars be on a regular grid or orthogonal?
Where the column spacing is not on a regular, symmetric grid, the layout of the reinforcing bars in the mat should be placed on an orthogonal grid and should not be skewed to follow the column layout. Additional bars can be placed at locations in the regular grid wherever required. This dramatically simplifies placing the bars in the field.
What is the distribution of flexural reinforcement in a rectangular footing?
Distribution of flexural reinforcement in a rectangular footing. The amount of reinforcement that is required at the interface between a column or wall and the footing depends on the type of stress in the longitudinal bars of the supported member under all applicable load combinations.