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J - British joists with taper flange

There are many advantages to constructing with taper flange beams.The Structural Engineer must design the steel members and give guidelines for the connections.Some structural steel shapes such as I-beams have a high second moments of area, which can result in stiffness compared to cross-sectional area.The cold-formed sections are suitable for all types of welding such as spot welding, seam welding, projection welding, butt and groove welding, plug welding and arc welding. It is very important for engineers to have understanding of the taper flange columns.
The strength to weight ratio is excellent; metals join easily; efficient shapes are available; etc. All of these are applicable to both uncoated and zinc coated British joists with taper flanges. Most structural steel failures occur at connections, where a beam connects to a taper flange column, where a joist connects to a beam, etc.For example they are used in, building frames, roof trusses, floor framing, bench frames, gates, fences, cattle grids, scaffolds, tank stands, television towers, car trailers, rails, etc. 

Different shapes of structural steel (both hot-rolled and cold-formed) are available with specifications such as: I-beam’s, Z-Shape (half a flange in opposite directions), HSS-Shape (Hollow structural section such as square, , Channel ( [-shaped), Tee (T-shaped cross-sections).These advantages create challenges that are best solved by a good understanding of how the metals actually perform in a structure. Taper flange beam shapes are suitable for a wide variety of uses.

Dimensions:
BS 4-1: 2005

Tolerances:
EN 10024: 1995

Surface condition:
According to EN 10163-3: 2004, class C, subclass 1

 

 

 

Designation Mass
per
m
Depth
of
Section
Width
of
Section
Thickness of Root
Radius
Toe
Radius
Flange
Taper
M h b (web)s (flange)t r1 r2 a
kg/m mm mm mm mm mm mm Degrees
254x203x82 82 254 203,2 10,2 19,9 19,6 9,7 8
254x114x37 37,1 254 114,3 7,6 12,8 12,4 6,1 8
203x152x52 52,2 203,2 152,4 8,9 16,5 15,5 7,6 8
152x127x37 37,2 152,4 127 10,4 13,2 13,5 6,6 8
127x114x29 29,3 127 114,3 10,2 11,5 9,9 4,8 8
127x114x27 26,8 127 114,3 7,4 11,4 9,9 5 8
127x76x16 16,5 127 76,2 5,6 9,6 9,4 4,6 8
114x114x27 27 114,3 114,3 9,5 10,7 14,2 3,2 8
102x102x23 23 101,6 101,6 9,5 10,3 11,1 3,2 8
102x44x7 7,4 101,6 44,5 4,3 6,1 6,9 3,3 8
89x89x19 19,5 88,9 88,9 9,5 9,9 11,1 3,2 8
76x76x15 15 76,2 80 8,9 8,4 9,4 4,6 8
76x76x13 12,7 76,2 76,2 5,1 8,4 9,4 4,6 8