# Calculations

Calculations

## Force to deliver Concrete

We need 1 bar for pumping every 3 meter of horizontal concrete pipe, we need 1 bar for pumping every 1 meter of vertical concrete pipe.

## Mild steel plate cutting charges

Q: To cut mild steel plate 8 1/2″ x 3″ with thickness 5/8″(5分）, price of steel is RM2.5 per pound

(Calculations are done in terms of inches and pound)

Below is the calculation of mild steel and its cutting charges using a basic calculator

5分 x 8.5 x 3 /144 x 5.15 x 2.5 m+

= Rm11.3999 –> price of steel plate

8.5 + 3 / 12 x 0.15 x 5分 cutting

= 0.7187 –> cutting charges

Total = RM12.1087

## About carbon steel

Carbon steel plate we commonly use 760, 水钢 also known as S45C, the price is usually double of mild steel.

A106

For example, currently mild steel is selling RM4.44/kg (as at 24 Dec 2021), 760 is selling RM9/kg

## About Stainless Steel

Stainless steel we commonly use 1B, also know as SS304, the price is currently four times (~3.88 times) of mild steel.

For example, today mild steel is selling at RM3.50 (as at 15 Dec 2022), 1B is selling at RM13.57/kg

3mm x 4′ x 8′ is RM950.00

Ornamented stainless

1100-H14

3mm x 4 x 8 – RM400 (weight 24KG, compare to steel 70kg)

Aluminium price per kg RM17.00 (as at 15 Oct 2023)

Aluminium can either undergo powder coat or anodising for colouring design.

## Cylinder Flat Sheet

To develop the blank flat length for a cylinder rolled from sheet or plate:

Essentially, you should calculate the centreline arc:

(Outside diameter – Thickness) x 3.1416 = Length of plate required

If we need a final pipe OD440 with 4.0mm steel plate, then (440 – 4.0 ) x 3.1416 = 1369.7376

Credit Quora @amit udgiri

## Metal Bending

To bend a L shape

if A is 300mm

B = 300mm

T = 3mm

L = 600mm – (2 x thickness)

= 600mm – 6mm

= 594mm

The 6mm is what we called a bend deduction.

It may varies depending on K factor, bending tools and inner radius, generally the result is close to thickness times two.

Refer Gasparini Calculator for more precise calculation.

## Steel price as at April 2022

This table is provided to help researcher and students.

Steel price is average at RM4,950/ton on April 2022.

## Timber and Metal Roofing

Generally, traditional corrugated zinc roof available in Malaysia has a standard width 2.16 feet or 26 inches. The effective width is 2 ft or 24″, deducting the overlapping gap.

The seller then let you choose among 6, 8, 10, 12 feet length.

## Useful Cad Command

### 1. Grid limit

Just right click Grid Setting, which is next to “model”. There you can alter the snap spacing X n Y. The default number is 10, while precision engineering can change to 0.01

## OTHER LISTING

AUTO PARTS (BEARING, SPROCKET, CHAIN COUPLING)