Hi,
I an following a tank design from 'The Design of Water Retaining Structures - Batty + Westbrooke'
I have bee looking at the RC circular tank with a fixed base 15m Dia.
The calculations suggets checking the wall with a fixed base and calculating reinforcement etc. then when designingt he...
Hi,
I am looking at a design of a rectangular balcony slab with 1 outer curved edge, the slab is well supported on the ends (built in) and also has a small amount of support at the ends of the curve, I would estimate the curve has a max. offset of 550mm and has an edge beam (down stand). As the...
Reinforced Concrete filled Steel mini Piles
Hi all,
Can anyone advise me of where I can find info on the design of reinforced concrete filled steel mini piles (preferably UK). The piles would be approx. 220mm dia with a central length of rebar.
As I see it I need to consider design for load...
Hi all,
I have a large gas genset (approx. 100KVA) when it is running for a while maybe 6-24hour I have notices the oil pressure is variable - this is normally around 5-5.5 bar but some times is dropping to approx. 2.8 bar this often returns to the correct pressure after approx 10 mins although...
Steel Frame or Not
I have a project where the architect had proposed a steel frame the building has dimensions 20x11.5m, 7.0m to eaves - with not internal walls etc. The budget is tight and the architect wants to investigate the possibility of using an external walls of 100/100/215 with steel...
Hi,
I have a residential project where a concrete yard area was poured. Approx. one and a half months later a cold snap came (temperatures 0 to -10 Deg Celceus). The concrete has spalled significantly on the surface and along the edges.
As the concrete was placed for this length of time I...
Hi Guys,
I hope you can help. I have a generator which has a piece of hardware for monitoring purposes. The hardware allows me to plug in a monitor and keyboard/mouse. When I plug these in and reset - the computer loads to the microsoft windows 95 startup menus. Here I have a number of options...
I have been asked to look as a domestic foundation solution for a site. the ground conditions are generally good (firm under foot) sandy gravelly ground. In one area of the building the contractor has gone through this layer into a different gravelly layer but of similar firmness.
To avoid the...
I have a large slab with a combination on longitudinal and contraction joints. Within the slab are a number of gullies and aqua channels. The channels are in line and approx. 2m long with a 2m gap between.
Q. should I make sure a joint in the slab runs along the line of aqua channels as if they...
If you place 1No. 215Dp. RC lintel over another and have a mortar bed between could these be considered to act compositely and have an increased effective depth therefore increased the capacity?
If not would you be able to add the 2 shear capacities together to increase shear load. (both would...
Can anyone point me towards a design example for helical stairs. The stair will only have support at the btm and top (concrete). I have looked at BS5395-2 but it seems to focus on the geometry.
I am designing some lighting brackets to fit to buildings for christmass lights. I need long brackets and the cantilever (by calculation) has high deflections. What would be a sensible limit for the cantilever deflection. (I usually assume L/180 is for carrying brittle finishes).
I am designing a stair with flat stringers using BS5950 and the SCI advisory note for the flat plates.
In a stair design the stringers extend across the landing at the top and have checker plate welded to brackets bolted to it at the top. I have analysised this section using software assuming...
We often used a guide set by the local authority and housing building association of changing to suspended slabs in a house when there is over 600mm Dp. of fill material.
I am now looking at a large factory building and will have aprox: 600mm - 1500mm of fill below the floor. I am considering...
If a structural screed is used over precast planks (hollow core units) this increases the load capacity of the units. Is this just due to the composite action of the reinforced concrete screed with the planks below giving an incresded effective depth the the prestressed strands or is the...
I have been looking at a wall already built. The lower 3.0m high section is a gravity boulder retaining wall with a 2.7m high anchor block and geotextile wall built of the top of it. The anchor wall seems to be adequate but I cannot prove the adequacy of the lower gravity wall when taking into...
I have to design a small flat slab platform approx. 12.5 X 15.0m. it will be supported by a grid of end-baering precast or mini piles. The platform is loaded with plant approx. 3.5kN/m2. (Will be designed by hand)
1. a small crane may have to be supported on the slab maybe 2-3 times in the life...
I was looking at designing a ground beam with a small cantilevered slab (900mm). The beam would be designed for all loads and torsion from the cantilevered slab off the side of the beam.
I am planning to use light reinforcement in the top of the beam - 10mm bars at 200mm ctrs. each way. (this...
BS 8110 Design
I aeem to recall that for a bar to be effectively lapped for continuity the bars must be within a certain distance of each other. Can anyone tell me where I can find the guidance on this?
