I'm evaluating an existing building for an increased crane capacity. Client wants to go from 30 Ton to 35 Ton. Overhead double girder, top running.
Everything is looking okay, except for lateral deflection on one of the crane runway beams. The runway beam on one side is on the exterior...
On a two-way concrete slab (w/ drops at columns) contractor forgot to add some piping sleeves near a column and has decided it would be okay to core without scanning for rebar.
I looked in the hole and they cut 1 of the 3 bottom integrity bars.
Anyone have recommended repair details?
I am looking at an expansion for an existing 5 story wood frame structure. (Residential)
The existing doesn't have capacity for additional gravity loads so the structure will need to be independent.
With the effects of settlement (footings) and shrinkage, I am concerned about the differential...
I need to review and existing slab for a 3 storey building and discuss coring options with the owner.
How can I tell without drawings if the 2nd floor slab is post-tensioned?
If I have a 20ft x 20ft room with a sump in the middle, is it best to run the control joints diagonally from the corners of the room to the corners of the sump pit?
Or saw cut down the centre with orthogonal pattern?
Do I need to consider slab on grade loads (Dead and Live) on adjacent grade beams or foundation walls?
Is there a difference if I key and dowel the slab into the grade beam?
I have heard mixed advice. The most common approach I have heard is to take 1 meter of tributary width of the slab on grade.
Yes the design is a portal frame, the question is more about the fixity of the connection.
Stiffeners are required?
Any other design guides for this type of connection?
The foundation is an existing slab on grade that I don't want to rely on for moment capacity.
The lateral loads are relatively light (interior equipment stand).
Is it possible to create a rigid frame to resist lateral forces using a connection as shown in the attached sketch? Continuous beam running on top of columns.
http://files.engineering.com/getfile.aspx?folder=a6ff9427-9c46-4ded-bddc-c9440ef4ceaf&file=Moment_Frame.pdf
I have a two consecutive simple span steel beams, designed accordingly for uniformly distributed load and only positive moment (wl^2/8). If the beam at the central column makes the beam continuous over the column, I will have a negative moment at the column. 2 questions:
1) If I do not have...
I am reviewing the structural steel design for a school. The building is 2 storeys with steel beam/column framing and open web steel joists. The walls consist of vertical steel studs between columns. The studs are connected at the bottom to the concrete floor slab and connected to the top at the...
