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Anonymous Poster

# L Angle Weight Calculation Formula

02/23/2010 4:37 AM

I get how to calculate weight but conversion in meter to be carried out.

so i need to know how directly calculating weight in mm.....

65*65*5mm -------- then 65x65x5x7.85/?????

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Anonymous Poster
#1

### Re: L angle weight calculation formula in mm

02/23/2010 5:01 AM

Weight is calculated in Kgs (not mms)

calculate the volume x multiply by density then convert the units as you want mm, microns cm,...

65x65x5 = volume of a square plate 5 thick and 65 x65 section

Density = 7.85 x 103 Kg/m3 = 7.85 T/m3

Guru

Join Date: May 2009
Location: Richland, WA, USA
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#2
In reply to #1

### Re: L angle weight calculation formula in mm

02/23/2010 11:22 AM

In meters, 0.065 x 0.065 x 0.005 x 7.85 ≈ 0.000166 tonnes = 0.166 kg = 166 grams.

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Anonymous Poster
#3
In reply to #2

### Re: L angle weight calculation formula in mm

02/23/2010 1:05 PM

he wanted it in mm not grams..

(Another of long list of posts- weight of channel, angle, and now there is a formula of u channel : formula for what? )

Off Topic (Score 5)
Guru

Join Date: Dec 2007
Location: 18 29 N 73 57E
Posts: 1387
#7
In reply to #1

### Re: L angle weight calculation formula in mm

02/23/2010 11:48 PM

The OP is asking for weight of an angle (L). All we are multiplying 65 with 65. Thus we are calculating weight of a square plate of 65 mm X 65 mm 5 thick.

Weight of an angle 65X 65 with web thickness of 5 will be (65 + 65 - 5)X5 X 1000 X7.8/1000000= 4.875 Kg per meter. (neglecting web end radius).

Here (65 + 65 - 5) is total length of web of 5 mm thick

5 is thickness of the beb

1000 is for 1 miter length of the angle.

7.8 density gms/cm^3 for steel.

Divided by 1000 to make mm^3 to cm^3

Divided by 1000 to make gms to kg.

But why to calculate. You have ready tables for all sections available in the market.

Power-User

Join Date: Apr 2007
Location: Toronto, Ontario
Posts: 118
#4

### Re: L Angle Weight Calculation Formula

02/23/2010 10:41 PM

What is the material? Steel? Aluminium? GFRP?

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Associate

Join Date: Jan 2009
Posts: 45
#5

### Re: L Angle Weight Calculation Formula

02/23/2010 11:31 PM

Helo

I think the basic approach is to find the volume of the given section per unit running length (either in per meter or per feet). L x b x H. It is preferbale to arrive at the volume in the same unit at which the density of the material is normally being given. I think the density is generally given in gms/cubic centimeters. So you should arrive at the volume in cubic centimeters in such a case.

Step 2:- When you know the material then find its density from standard tables

Step 3:- Then calculate the weight :- volume (say in cm3) x density (gms / cm3) this will give you the weight of the section per unit length

Step 4: multipy the arrived weight per unit length with the actual length of your section.

alternate option:- Now a days the weight of the standard sections have been tabulated and available in many technical handbooks. You can straight away refer from these handbooks.

Regards

Ramesh

Participant

Join Date: May 2009
Posts: 3
#6

### Re: L Angle Weight Calculation Formula

02/23/2010 11:44 PM

let us assume the material is steel (since value 7.85 is used)

weight = volume x density

= 6.5 cm x 6.5 cm x 0.5 cm x 7.85 gms / cm3

= 165.83 gms

This way we can calculate for different materials with different densities.

Basically we need to convert all the dimensions its to same metric unit.

Guru

Join Date: May 2009
Location: Richland, WA, USA
Posts: 20122
#8

### Re: L Angle Weight Calculation Formula

02/24/2010 12:16 AM

Correction to my earlier post....

When I read the body of the OP I was thinking of a small square of material, rather than an angle shape of some length.

W = (l1 + l2 -t)(t)(ρ)(L); where l1 and l2 are the leg dimensions, t is the thickness, ρ is the density, and L is the length. In the given example, it works out to 4.9 kg per meter of length.

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Anonymous Poster
#9

### Re: L Angle Weight Calculation Formula

02/24/2010 4:23 AM

Lets get really picky - you guys are all calculating the mass, he asked for the weight! Albeit in weird units.

Anonymous Poster
#10
In reply to #9

### Re: L Angle Weight Calculation Formula

02/24/2010 4:59 AM

Grand Unification theory in the singularity area?

Here all the laws will collapse so mass, weight, length all will be same (none will exist )

This is my GUT feeling.