Piperack Quantity Estimations

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Structural Quantity Estimate for Steel buildings - Thumbrule Goto page 1, 2, 3, 4, 5 Next

www.sefindia.org Forum Index -> SEFI General Discussion View previous topic :: View next topic Author gpsarathyy ...

Message Posted: Sat Feb 05, 2011 8:41 am Thumbrule

Post subject: Structural Quantity Estimate for Steel buildings -

Dear Sefians, I need to know the rough estimate quantity for the building and steel structures. For the structures like, Joined: 28 Jun 2010 Posts: 466 Location: chennai

Work shop building without crane - (xx) T/m³ Work shop building with crane - (xx) T/m³ Simple Piperack Structure - (xx) T/m³ Piperack Structure with Air fin coolers at top etc., - (xx) T/m³ structural steel wt in Metric tonnes. Volumn of the building - L X B X H in m³ If you are having interms of Tonne/m length also ok. These details can be maintained by the experienced Engineers only. I too have some values for the above listed structure, before putting that here, I like to get the values from the other Experienced Engineers. If I put now all will comment and suggest based on that value only. The above value is not same through out the world, it depends on the design code, site location, construction material available, type of construction etc., Still we can have some rough value for each structure. Like a rule of thumb. After finishing our design we can cross check our design where we stand, whether overdesigned or it is economical design... If we get this one for all kinds of structure we can list here in SEFI. which will be very useful for the young Engineers who are working in design. Senior Engineers please give your opinion on this topic. Regards, G.Parthasarathy Chennai. [email protected]

http://www.sefindia.org/forum/viewtopic.php?p=33011

4/8/2015


Back to top gpsarathyy ...

Posted: Sat Feb 05, 2011 8:48 am

Post subject:

Dear Sefians, If it is available in any textbooks or hand books, please let me know. If anybody is not interested in posting this in public forum, please mail it to me. Joined: 28 Jun 2010 Posts: 466 Location: chennai

Regards, G.Parthasarathy Chennai. [email protected]

Back to top gpsarathyy ...

Posted: Sun Feb 06, 2011 10:48 am

Post subject:

Dear Sefians, I am waiting for your opinion and sharing of knowledge in this topic. Regards, G.Parthasarathy Joined: 28 Jun 2010 Posts: 466 Location: chennai

Chennai [email protected]

Back to top Dr. N. Subramanian General Sponsor

Posted: Sun Feb 06, 2011 7:34 pm Thumb

Post subject: Re: Structural Quantity Estimate for Steel buildings -

Dear Er Parthasarathy, App. steel quantities for Steel multi storey buildings may be assumed as below: 3-4 storey building- 35-40 kg/m^2 6-8 storey building

40-50 kg/m^2

The dead weight of truss,inclusive of bracings may be assumed as about 10% of the weight it is going to support. Joined: 21 Feb 2008 Posts: 4865 Location: Gaithersburg, MD, U.S.A.

Formula for app. weight of truss is(when LL less than 2 kN/m^2) w = 53.7 + 0.53 A where A is the area of one bay.

Best wishes, NS gpsarathyy wrote: Dear Sefians, I need to know the rough estimate quantity for the building and steel structures. For the structures like, Work shop building without crane - (xx) T/m³ Work shop building with crane - (xx) T/m³ Simple Piperack Structure - (xx) T/m³ Piperack Structure with Air fin coolers at top etc., - (xx) T/m³ structural steel wt in Metric tonnes. Volumn of the building - L X B X H in m³ If you are having interms of Tonne/m length also ok. These details can be maintained by the experienced Engineers only. I too have some values for the above listed structure, before putting that here, I like to get the values from the other Experienced Engineers. If I put now all will comment and suggest based on that value only. The above value is not same through out the world, it depends on the design code, site


4/8/2015


location, construction material available, type of construction etc., Still we can have some rough value for each structure. Like a rule of thumb. After finishing our design we can cross check our design where we stand, whether overdesigned or it is economical design... If we get this one for all kinds of structure we can list here in SEFI. which will be very useful for the young Engineers who are working in design. Senior Engineers please give your opinion on this topic. Regards, G.Parthasarathy Chennai. [email protected] Back to top gpsarathyy ...

Posted: Fri Feb 11, 2011 5:29 am

Post subject:

Dear NS Sir, Thanks for you reply. I also like to have the values for the sheds (steel structure). Regards, Joined: 28 Jun 2010 Posts: 466 Location: chennai

G.Parthasarathy Chennai [email protected]

Back to top nwalavalkar ...

Posted: Fri Feb 11, 2011 6:14 am

Post subject:

Piperack without fin fan coolers shall go up to 20 to 25 kg/m3 Joined: 18 Nov 2010 Posts: 57

With Fin fan coolers it is 23 to 28 kg/m3. This is for pinned base and with deflection limit H/200.

Back to top vikram.jeet General Sponsor

Posted: Fri Feb 11, 2011 6:47 am Thumbrule


Dr NS sir has very appropriately provided the figures for estimation of steel quatty. Rough computation is seen as under: Joined: 26 Jan 2003 Posts: 2212

Approx. Quatty of steel slabs - - - 80 to 100 Kg/m3 Beams - - - 200 to 250 Kg/m3 columns - - 200 to 225 kg/m3 ( taking average for full height) footings - - 50 to 60 Kg/m3

Illustration: A normal panel of size 5m X 5m (4 storied@ 3.5m ht) Area = 25 sqmX 4 = 100 sqm footing size 3.5X3.5m X 0.60 th column size - - 40X40cm Beam size - - 30 X 45cm Slab th- - 150 thk Slabs = (5*5-0.3*5*2)*0.15*90 *4 =1134 Kg Beams = (5+5)*(0.3*0.45)*225 *4 =1215 Kg Columns = (4*3.5+1.2)*0.4*0.4*212.5 =517 Kg Footings = 3.5*3.5*0.60*60 =441 Kg Total = 3307 Kg Steel per sqm= 3307/100 = 33 Kg


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(thus 35 to 40 Kg/m2 is appropriate) For raft foundation it will be higher in case of high rise. best regards vikramjeet

Dear Er Parthasarathy, App. steel quantities for Steel multi storey buildings may be assumed as below: 3-4 storey building- 35-40 kg/m^2 6-8 storey building 40-50 kg/m^2 The dead weight of truss,inclusive of bracings may be assumed as about 10% of the weight it is going to support. Formula for app. weight of truss is(when LL less than 2 kN/m^2) w = 53.7 + 0.53 A where A is the area of one bay.

Best wishes, NS -Posted via Email Back to top gpsarathyy ...

Posted: Fri Feb 11, 2011 2:25 pm

Post subject:

Dear MR.Vikram Jeet, Thanks for giving the values. For concrete the estimate values are given in the codes (I think it is given in the code IS 2974) and books also, likewise for the steel structure any code or book is available? If yes please let me know. Joined: 28 Jun 2010 Posts: 466 Location: chennai

Dear W

alavalkar, Thanks for giving your opinion and values for the piperack. But I think it is for Indian code IS 800 and with Limit state method design. If possible givethe values for the other steel structures also.

Regards, G.Parthasarathy Chennai [email protected] Back to top vikram.jeet General Sponsor

Posted: Sat Feb 12, 2011 4:07 am Thumbrule


Dear Er G. Parthasarthy


4/8/2015


For steel structures kindly see Indian standard IS SP-38 Handbook for typified designs for structures with steel roof trusses and IS SP-40 for steel portal frames Detailed Quatty for steel columns,base plates, trusses purlins Joined: 26 Jan 2003 Posts: 2212

and other components are also given alongwith design for A type as well as LTR trusses in SP -38 (spans upto 30m) Quatty in terms of Kg/m2 is also available in both the codes. Best regards vikramjeet

Dear MR.Vikram Jeet, Thanks for giving the values. For concrete the estimate values are given in the codes (I think it is given in the code IS 2974) and books also, likewise for the steel structure any code or book is available? If yes please let me know. -Posted via Email Back to top vikram.jeet General Sponsor

Posted: Sat Feb 12, 2011 5:16 am Thumbrule


Dear Er G Parthasarthy ji After checking from IS SP-38 for 24.0m span truss the exact weights are as under (for wind pressures 150 Kg/m2): Joined: 26 Jan 2003 Posts: 2212

Weight = Truss members+gusset,+Purlins+Tie runners Truss - - A type (24.0m span) Tubular /slope 1 in 3 /purlin spacing 4.5m - - - - 13.8 Kg/m2 Tubular /slope 1 in 4 /purlin spacing 4.5m - - - - 15.2 Kg/m2 Tubular /slope 1 in 5 /purlin spacing 4.5m - - - - 15.9 Kg/m2 Tubular /slope 1 in 3 /purlin spacing 6.0m - - - - 16.9 Kg/m2 Tubular /slope 1 in 4 /purlin spacing 6.0m - - - - 17.3 Kg/m2 Tubular /slope 1 in 5 /purlin spacing 6.0m - - - - 18.3 Kg/m2 Truss - - A type(24.0m span) Angle /slope 1 in 3 /purlin spacing 4.5m - - - - 18.6 Kg/m2 Angle /slope 1 in 4 /purlin spacing 4.5m - - - - 19.5 Kg/m2 Angle /slope 1 in 5 /purlin spacing 4.5m - - - - 20.9 Kg/m2 Angle /slope 1 in 3 /purlin spacing 6.0m - - - - 21.3 Kg/m2 Angle /slope 1 in 4 /purlin spacing 6.0m - - - - 22.0 Kg/m2 Angle /slope 1 in 5 /purlin spacing 6.0m - - - - 23.5 Kg/m2 A-type vs LTR truss Truss - - A type Span - - - 12.0m Tubular /slope 1 in 5 /purlin spacing 4.5m - - - - 13.9 Kg/m2 Tubular /slope 1 in 5 /purlin spacing 6.0m - - - - 17.0 Kg/m2 Truss - - Lean-to-roof Span - - - 12.0m Tubular /slope 1 in 5 /purlin spacing 4.5m - - - - 12.9 Kg/m2 Tubular /slope 1 in 5 /purlin spacing 6.0m - - - - 15.3 Kg/m2 Effect of span on weight =Truss members+gusset,+Purlins+Tie runners


4/8/2015


Tubular /slope 1 in 5 /purlin spacing 4.5m Span 9.0m weight = 14.1 kg/m2 Span 12.0m weight = 13.9 kg/m2 Span 18.0m weight = 14.1 kg/m2 Span 24.0m weight = 15.9 kg/m2 Span 30.0m weight = 17.3 kg/m2 Hope above data may be useful for estimation best wishes and regds vikramjeet -Posted via Email Back to top Display posts from previous: All Posts

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Piperack Quantity Estimations

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