I was designing abutments active end and passive end for prestressing. In the attached pdf 3m below ground part can be designed as short pile? Attached Structural concept will work since the load is very large approx 800 ton..? I am getting 30mm deflection for the abutments when ignoring bottom...
Hi
In calculating sum of overturning moment, apart from wind load or soil back fill load, should I have to consider Moment due to eccentricity of foundation? Please see attachment.
I think Mw + Nxe I should consider when calculating stresses under foundation.
Mw = Moment due to wind load
N =...
Hi everyone,
How to calculate equivalent static load due to vibrating mass.
To be specific, it is vibrating roller load.
Drum Load = 14.9 Ton
Frequency = 28 Hz (1680 vpm)
Amplitude = 0 - 2.5mm
Total load on soil considering vibration will be how much?
Thanks.
Hi
How wheel load is distributed on a slab buried 1m deep in soil? Is attached analysis is correct?http://files.engineering.com/getfile.aspx?folder=2a2ccc94-0131-4cf8-9100-fdb9f38d4805&file=IMG_20170208_165118.jpg
Hi
I have a full precast frame structure with plan size 100 x 50 m . Does this building require expansion joints? 20 mm gap between every beam and column at corbel is not sufficient?
Hi
What should be the minimum concrete cover to reinforcement for Precast cable trenches as per BS Codes for a durability of 40 years? 75mm is recommended in BS if concrete is cast directly on ground for cast in place concrete.Is there any other reference in BS which specifically talking about...
Which connection(column to footing) is suitable for precast column in an industrial building with gantry girder? Column in footing pocket or column with base plate connection?
Hi,
Can we use recycled steel bars came from a concrete block casted 2 years back. The steel is in the form of square rings which will be straighten up and used in the columns. Please suggest.
Hi
In the picture is Hollow core slab 150mm. What might cause such finish in the slab? Is it water content in concrete or poor compaction?http://files.engineering.com/getfile.aspx?folder=5da7fecb-987f-4718-8342-d8cd443bdd84&file=IMG_20160508_125715_HDR.jpg
Hello everyone
I have a boundary wall panel 200mm thick(6.2m L x 4.5m H) with outside elevation having 50mm recess covering 70% of panels elevation. Its subjected to wind pressure of 1.0 kN/m2 laterally(which can be from both direction) front and back. Can I use single wire mesh in the middle...
Hello everyone
Does ØMn > 1.2Mcr and ØMn > 2.0Mu as per ACI 318 should be satisfied at every section of Hollowcore or only at critical section where moment is maximum i.e at center?
See attachment from concise beam flexure graph. Would this be considered as section not safe in flexure as the...
I am planning to buy a land 1000 m2 , 20mins far from the city to live there. Right now I want to buy land and make boundary wall and keep it for future to make house and farm there. What are the cheapest options to make a fence for this purpose? Like block wall fence etc.
Thanks!
Hello all,
The project is in tender stage. Client is asking for a 100mm cladding, which will be supported on Cip beams top and bottom on each floor. I am afraid about Demoulding the panel which can be solved by using a tilting table. Embeds like Halfen channel might not be possible as the panel...
I am getting strand elongation for 9.3mm and 12.7mm as same 902mm. Am i doing something wrong? Please look at the attachment.http://files.engineering.com/getfile.aspx?folder=28f6cd8f-f199-494e-a50a-330fb929dfe4&file=prestressing_force.jpg
Hello everyone
I have designed a coupler to join 2 prestressing strands to avoid wastage ( see attachment )
1. For 9.3 mm dia strand
a. Load Capacity = 100kN ( strand A= 52mm2, fpu = 1770 N/mm2, 70% tensioning only)
b. Base thickness of plate = 15mm (limited to 15mm to maintain strand cover)
c...
Hello everyone
I have designed a coupler to join 2 prestressing strands to avoid wastage ( see attachment )
1. For 9.3 mm dia strand
a. Load Capacity = 100kN ( strand A= 52mm2, fpu = 1770 N/mm2, 70% tensioning only)
b. Base thickness of plate = 15mm (limited to 15mm to maintain strand cover)
c...
Hi everyone.
I have a hollow core, loaded with block wall(please see attachment). 300mm column cutout is there and wall load is present on this unsupported part. I want to ask, what would be the possible failures in the hollow core slab. Shear failure because of reduced bearing, failure in core...
