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Hi, I'm working with BS5950 and I'm not clear about how to design against warping and torsion! Details are given about lateral torsional buckling but nothing resembling Vlassov or St Venants torsion seems to be taken into account. An tips on where the formulas are for determining that torsion...

I'm unable to find a forum concerning the British standards so I'm trying this forum. I have a quiry concerning Table 4.2 in BS8100-1 concerning towers. The question is whether or not internal and external refers to the plan or the elevation of the tower. Does internal mean actually inside the...

I'm trying to set up an excel spreadsheet for BS8100 concerning wind loading on masts but have not been able to find an equation for determioning Kr (terrain roughness factor). Does anyone out their know the equation?

OOPs! sorry!

I'm trying to set up an excel spreadsheet for BS8100 concerning wind loading on masts but have not been able to find an equation for determioning Kr (terrain roughness factor). Does anyone out their know the equation?

Thanks for the reply! all the best

Hi, I'm looking at how to determine a reduction factor for a wind load acting on a cylindrical form(diam. 550mm). The 50m/s wind load exerts a pressure of 1.5kN/m2 on the form. To determine a line load vertically on the form I simply multiply the pressure by the diam. which gives me a line...

I'm having trouble determining the value Kq for calculating shear loading on masts. BS8100-1-G.5.5 showes a ratio fq which has to be calculated from the Fq/F. It states that "Fq is the mean shear load carried by the bracings at level zq" and that "F is the mean shear load, normal to the...

I placed the telecomunication boxes on top of a blockwork structure housing the toilets in the pub. I set up a steel frame punctureing through the roof and resting in the block work. I used BS5628 for determining the strength of the blockwork wall. The old wall was not touched! What did...

I'm strictly not allowed to tamper with the steel. I've tapped the legs and have not been able to come to a satifying conclusion. This ultra sonic device sounds interesting! Do you know any manufacturers?

The wall is the last part of The Wall of Limerick so it is a Heritage site. There is a pub on the other side and the clients wanted the communication boxes above that roof. The Limerick County Council hadn't heard anything about this idea of building on the wall but I gave the clients an...

Are there any devices on the market for determining if a leg of a tower is solid or not without tampering with the steel? Can ultra sound be used? I'm analysing masts and have trouble finding out if the members are hollow or not.

Hi guys, This is a wall called Bourke House in Limerick Ireland. The actual house has disintergrated and only the front wall is left standing. The wall is 17 m long and 7.5 m high 0.735 m thick and I've been given the task of determining if a 1200 kg telecommunication box can be cantilevered at...

I'm investigating BS8100 concerning the design loads for lattice masts. I have problems with the The derivation of the ratio fq, concerning gust factors, which as stated is Fb/F. (Fb=mean bracing force and F=mean shear force)Ref:BS8100-2:1986 C.5.8 The Fb value appears negative while the F...