Hi everyone,
Looking for some advice/suggestions .
I work for a UK based manufacturer of bespoke precast concrete elements,specializing in curved and spiral staircases .
Mould and final product inspection is both labour and time consuming ,not to mention complicated.Is there a suitable
option on...
Hoping that someone out there can help .
I have recently started with a small bespoke precast company who specialise in curved stairs etc . I am trying to source someone who can produce the structural reinforcement details and production drawingsfor individual units ( CAD drawings ) , and...
Have been trying to comply with a concrete specification for an XD3 exposure class . BS 8500-1 Table A4 dictates that for an intended working life of 50 years with 40mm+ reinforcement cover a C45/55 is required with a minimum CEM content of 380 and maximum w/c ratio of 0.35 . Having difficulty...
I am trying to find out the predicted camber of a prestressed hollowcore unit . Rule of thumb is usually length/300 . However some publications say this is to determine the maximum allowable camber , whereas others say it is the predicted camber and subsequently has a 50% margin of error plus or...
Could anyone advise me on the effect a reduction of say 5% ,on the stress values on the strand in a hollowcore unit would have on the load / span capabilities of the slab . I assume that the tension to which the strand is stressed has a direct correlation to the physical properties of the...
Could anyone give me details of any procedure showing a method for load testing a hollowcore slab to destruction . Details of load increments and types of failure to consider , would be most helpful .
Cheers Maddog
I work for a hollowcore company , who are suffering from a problem at present , where after detensioning , the webs of the slabs are suffering from lateral cracking / splitting .The hollowcore is produced by a slipforming process where the top and bottom of the unit is produced in seperate...
I work for a prestressed concrete floor manufacturer , within the Quality Department . We test 24 hour and 7 day cubes in house but all 28 day cubes are sent to an independant laboratory for testing . I was hoping that someone could tell me the necessary measures or accreditation that a company...
I am trying to locate a supplier for steel fixing clips for
tying rebar . I reckon they are called either Quick Clips or Speedy Clips . If you could provide me with a name and / or supplier I would be grateful
I was hoping someone could give me some information regarding the posssibility of substituting 16mm rebar in
a cantilever with 9.3mm strand . I am told that it is possible , in this application of a hollowcore slab , but I was hoping for some other opinions . To achieve similar properties to...
