DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
(OP)
Dear Engineers,
I need one clarification for using Design strength of Bolt in AISC and BS standards. Please look my following queries,
I. I’m using Grade 8.8 bolt in AISC connection calculation, what is the design strength of tension and shear strength….?
II. As per AISC-LRFD 2005, design strength of bolt should be multiplied by 0.75.
For eg,
Please find the attachment.
Please tell me how to find the design strength of question marked in table.
Your Budding Engineer
Arun S
I need one clarification for using Design strength of Bolt in AISC and BS standards. Please look my following queries,
I. I’m using Grade 8.8 bolt in AISC connection calculation, what is the design strength of tension and shear strength….?
II. As per AISC-LRFD 2005, design strength of bolt should be multiplied by 0.75.
For eg,
Please find the attachment.
Please tell me how to find the design strength of question marked in table.
Your Budding Engineer
Arun S





RE: DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
Your table is incorrect, the tensile strength is larger than the shear strength.
AISC 360 Specification for Structural Steel Buildings shows the following values for A325: 620 MPa for tension and 330 MPa for shear (assuming threads in the shear plane)
EN 1993-1-8 Eurocode 3 : Design of steel structures, Part 1.8 : Design of joints shows the following values for 8.8: 576 MPa for tension and 320 MPa for shear (assuming threads in the shear plane)
Cory
RE: DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
Have a look at this site for 8.8 bolt strengths
http://www.roymech.co.uk/Useful_Tables/Screws/Stre...
RE: DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
Sorry I had typed wrongly, thank you.
please find the attachment.
Dear Engineers,
I wanna know what the design strength of 8.8 grade (as per BS) bolt when we using in AISC connection design formula.
As per AISC-LRFD 1999,
Tension capacity of bolt, Rut = Ф X Ft X Ab where Ф = 0.75 and Ab is nominal body area of bolt.
In which Ft = 560 N/mm2 (Tension strength of grade 8.8 bolt as per BS) or it will vary.
Please describe it.
RE: DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
The AISI S100 specification for cold formed steel covers smaller bolts and uses a larger reduction to the tensile strength for the smaller bolts because the ratio of the threaded area to unthreaded area is smaller on smaller bolts. Since metric bolts are being used, it would be wise to check this ratio of the net tensile area to the nominal area of the unthreaded bolt before using the AISC equations. With bolt in the US, the net tensile area is commonly calculated using with 0.7854 x ( d - 0.9743 / n)2. Where d is the nominal diameter and n is the threads per inch.
The current AISC specification (AISC 360-10) and commentary can be downloaded for free from AISCs website, the entire Steel Construction Manual with the design aids and tables can be purchased on the website.
RE: DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
According to BS 5950 the values are 575N/mm^2 tensile and 375 N/mm^2 shear.
Desertfox
RE: DESIGN STRENGTH OF BOLT BETWEEN AISC AND BS STANDARD
now i'm clear from your reply.
hi desertfox,
please refer BS 5950_1:2000, table 34 for Tension strength of bolt.
for grade 8.8 bolt tension strength was 560N/mm2.