Hi,
I am using Autodesk Robot to model a standard low-pitch portal frame. In the software the rafters are modelled as two separate elements (broken by a central node at the apex).
There are separate settings for lateral buckling to define the spacing for adjoining members. However, I was...
Hello,
I have a question about tension laping bars described in EC2.
The Eurocode says that the arrangement of lapped bars should comply with Figure 8.7:
- the longitudinal distance between two adjacent laps should not be less than 0,3 times the lap length, l0;
And in the other parapraph states...
Hi there,
I am involved in design of a complex 2 storey reinforced concrete tank ,size approx. 33m x 100m. The tank will be piled.
The tank will be subjected to significant differential settlement. The walls have expansion joints. The base was designed as a stiff plate to cope with the...
Hi,
I am involved in design of extensive refurbishment and upgrade works of an existing shopping centre.
The original building consists of a light weight cladding roof on cold formed purlins on precast 4' pitch roof concrete beams on 300x300mm precast columns. The building is a single storey...
Hi All,
I am currently designing a large redevelopment of existing warehouse into a high-quality archive storage facility.The scope of work includes the construction of new intermediate floors within the existing one story warehouse to increase the vertical space of the warehouse area. The...
Hi,
I have a project where the Site Investigation indicated extremely acidic ground conditions with PH = 2. In the BRE special digest they say that anything below 2.5 is a problem. A contractor also highlighted that these conditions are very difficult for construction ??
Cheers
Hi,
I am designing a foundation for 27meter high steel silo, 15m in diameter, full of wood chips (density of green wood chips approx. 350kg/m3). The silo is supported on a braced steel frame structure, 10 meter high on a raft foundation approx. 1.2m deep. I have sized the steel frame and raft...
Hi ,
I am designing an underground tank (7x5m by 4m deep), my question is when the tank is empty should the base slab be designed for uplift pressure (due to ground water) plus upward pressure due to self weight of walls and a roof slab and live loads? I am not sure if these two forces are...
Hi,
I am designing a 30m span portal frame, 11m high. The frame has been analysed as a pinned frame. When designing the baseplate I found that due to horizontal forces I need to provide 30mm dim holding bolts. We also intend to cast the baseplates with concrete stubs.
My issue is that the...
Hi All,
I am designing a large slab on ground to the ACI standards, however I have only experience in designing to the EN codes and TR34. When using the ACI approach (unreinforced slab) I am getting a very thick section in comparison to TR34. The reason is that the ACI only allows to design...
All,
I am designing a 200mm ground slab for a large freezer warehouse operating at -30deg. I would like to eliminate the control joints by increasing reinforcement to 0.5% of a cross section. This normally works well for a standard dry warehouse but not sure if this is the best approach for the...
Hi All,
I have a project where need to design a 8m high blast resistant masonry wall. All interior walls for the refrigeration plant have to be designed to withstand outward pressure of at least 2.4kpa (50lb/SF) in excess of the design outward pressure of the other refrigeration plant room...
Hi All,
I am designing a large cold warehouse (100x100m) consisting of a standard steel beam to column frame. The building is operating at -30 deg. The frame is pinned and braced X as a big box. I did a 3D stick model, applied a drop temperature of -50deg to each steel member (assuming ambient...
