HOW TO FIND THE MEAN GIRTH OF THE SIMPLE BUILDING

-
Mean girth of building, this is the centerline perimeter or circumference of the building, which describes length of the building.

The following text show how to find the mean girth of simple building plan shown below for superstructure walling which can help in quantity determination of different materials to be applied for paint work, plaster work, blocks or brick work.

Important Terms

1. External Dimensions. 
These are dimensions measured from      external surface of the building's walls, these always show the extent of building on plot.

2. Internal Dimensions.
These are dimensions measured from internal surfaces of the building walls, these always show sizes of rooms.

3. Corner.
These are interconnection or points where two non colinear walls meet.

4. Recesses.
There are the partition or adjoining walls which forms rooms or which were not considered in exterior girth of building determination.



Timesing
Dimension
Quantity
Description



The mean girth of simple building for superstructure block wall of thickness 150 mm.

Internal Dimension
Length                          6.45
Width                           6.80

Add corners
4/2/0.5/0.15                  0.60
                                                       13.85
Add Recesses (Internal Walls) 
Portion A
5.50  add corners  2/0.5/0.15          5.65
         
Portion B
3.10 add corners  2/0.5/0.15           3.25

Portion C
1.50 add corners 2/0.5/0.15            1.65

Portion D    
2.20 add corners 2/0.5/0.15            2.35

The mean girth of the given plan is the summation of measured dimensions = 26.75m

The steps of calculating mean girth of building from external dimensions is similar to that from internal dimensions of building, the only difference is;

From Internal Dimension

From External Dimension

Corners are added to internal dimensions to have centerline dimensions.

Corners are deducted from external dimensions centerline dimensions.

Comments

  1. Nina AthenaJanuary 15, 2020 at 2:39 PM

    Thank you for giving me insight, tips and information on this. It helps me a lot! Can’t wait to read more updates from you.

    elcometer 456

    ReplyDelete
  2. UnknownSeptember 18, 2020 at 2:48 AM

    So grateful for the information provided
    I really didn't know the reason for calculating the mean girth but now i do
    Your help is appreciated

    ReplyDelete

Post a Comment

Popular posts from this blog

HOW TO CALCULATE AMOUNT OF MORTAR PER S.Q.M FOR BLOCK WALL

-
Image
HOW TO CALCULATE AMOUNT OF  MORTAR  PER S.Q.M FOR BLOCK WALL The amount of cement paste required as mortar per square meter can be calculated through the following steps 1.       Knowing the dimension of the blocks to be used for construction. Here, let’s say we use the cement concrete block of size 150 x230 x450 where by 150 s the thickness of the wall. These dimension s (all dimension are in mm) help to find the area of one block forming wall surface as follows Area of one block = 230 x 450                              = 103,500mm 2 2.        Knowing the new dimension of blocks with cement mortar. New dimension of concrete block means the height and length of a block with the thickness of mortar which is 15m, then the new height id 245mm and new length is 265mm From these new dimensions we can get new area of one cement concrete block as follows Area of one block = 245 x 465                              = 113,925mm 2                              =1.14 x
Read more

HOW TO CALCULATE THE NUMBER OF BLOCKS REQUIRED FOR WALLING

-
Image
The number of blocks required for wall can be calculated from the area of the wall which will be constructed by the block of certain size. The mean girth of the simple obtained as calculated from previous post is 28.85m The common (standard) size of the conc. block is 150 x 230 x 450; the wall length (mean girth) of building is multiplied by the height of the walls to find the total  surface area of wall, for a wall of height 2.8m with the opening as shown in the table below The table below shows windows and doors schedule for doors and windows used   Schedule for windows used PORTIONS WIDTH(m) HEIGHT(m) NUMBER(m) AREA(m 2 ) A 1.50 1.50 3 6.75 B 1.50 1.50 2 4.50 C 0.7 0.7 1 0.49 1.00 1.50 1 1.50 D 1.50 1.50 1 2.25 1.00 1.50 1 1.50 Total Area of All Windows
Read more