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Scaffold couplers are essentially the fundamental component that is used to assemble tube-and-coupler scaffolding. Tube-and-coupler scaffolding is defined as 'a scaffold in which individual circular tubes serving as standards, braces or ties are joined together by means of purpose-designed couplers'.
This basic fitting that is designed to join two scaffold tubes can be used to create a diverse range of scaffolding structures or used as an accessory to prefabricate scaffolding systems.
This manual includes basic types of scaffold couplers which join two tubes together as well as special couplers used to connect scaffold tube to other components, equipment or structures. scaffolding clamp load capacity.
DOUBLE COUPLER LOAD CAPACITY: '
637.32
KGF) against slip at tightening torque of 54 Nm.CLICK HERE FOR > JSA
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SWIVEL COUPLER LOAD CAPACITY:-
EXPENDING JOINT PIN LOAD CAPACITY: '
EXTERNAL SWIVEL COUPLER LOAD CAPACITY: '
BOARD CLAMP LOAD CAPACITY:-
PUTLOG COUPLER LOAD CAPACITY: '
BEAM CLAMP LOAD CAPACITY
How to calculate scaffolding load capacity:
Scaffolding classes, duties, and dimensions
Types of scaffolding load
How to calculate DEAD load of scaffolding
Example of Dead load calculation of scaffolding
Scaffolding Pipe/tube weight 4.5 kg per meter as per BS EN 39:
1×3m standard = 14 kg.
1× Screw jack = 05 kg.
4× Ledgers 40 kg ÷ 2 = 20 kg.
4× Transoms =32 kg ÷ 2 = 16 kg.
1× Face brace = 18 kg ÷ 2 =9 kg.
1× End brace = 10 kg ÷ 2 = 5 kg
5× 2.4m planks = 100 kg ÷ 4 = 25 kg
TOTAL = 94 kg. (Dead load)
How to calculate Live load of scaffolding
Light duty ScaffoldMedium duty ScaffoldHeavy-duty Scaffold225 kg/m2450kg/m2675 kg/m2Live load = Workers weight + tools weight + materials weight.
SWL (safe workload of scaffolding)= D + (4 × L)
D= Dead load
L= Live load
Scaffolding bag weight capacity
Scaffolding bag used for scaffolding materials lifting, ground to elevation. Most scaffolding bags are made from canvas, it is very useful for lifting scaffolding components and scaffolding spanners.
The capacity of scaffolding bag' (SWL of Scaffolding Bag) ' 30 Kg to 50 Kg. subject to scaffolding bag physical condition.
Also, read this:
Types of Scaffolding
Scaffolding
Grinding safety
Rigging safety
Excavation safety
HIRA
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Understanding the Capacity and Types of Access Scaffolding Couplers
Scaffolding is an integral part of many construction and renovation projects, providing temporary structures that ensure safety and accessibility for workers. In this article, we will dive into the topic of access scaffolding couplers - the vital components used to secure scaffolding tubes together. We'll explore their types, resistance, and capacity, focusing on critical parameters such as slipping force, cruciform stiffness, and bending.
Types of Scaffolding Couplers
There are several types of couplers, and each serves a specific purpose:
Right Angle Coupler (Class A and Class B)
:
Double coupler
These are designed to connect scaffold tubes at right angles. Class A couplers can withstand a slipping force of 6.1 kN , possess cruciform stiffness of 10.0 kNm/rad and possess cruciform bending of 0.24 KNm. On the other hand, Class B couplers have a higher slipping force capacity of 9.1 kN and cruciform stiffness of 15.0 kNm/rad and possess cruciform bending of 0.48.
Friction Type Sleeve Coupler (Class A and Class B):
Sleeve coupler
These are used to connect tubes end-to-end. Class A has a slipping force of 3.6 kN and no cruciform bending, while Class B couplers can withstand a slipping force of 5.50 kN.
Internal Joint Pin:
Internal pin coupler
This type of coupler is used to connect inner sections of tubes, and can't withstand a slipping force .
Swivel Coupler (Class A and Class B):
Swivel coupler
These allow for connection at any angle. The Class A swivel coupler can handle a slipping force of 6.1 kN and cruciform stiffness of 9.1 kNm/rad. The Class B variant can deal with a slipping force of 9.1 kN.
Parallel Coupler (Class A and Class B):
Used to connect tubes parallel to each other. Class A has a slipping force of 6.1 kN and Class B has a slipping force of 9.1 kN.
Putlog Coupler:
Putlog coupler
This type of coupler is designed to connect a transom or putlog to a ledger, allowing a single tube to be held in place.Used to connect tubes parallel to each other. Putlog coupler has a slipping force of 0.63 kN , has a cruciform stiffness of 0.036 kNm and a cruciform stiffness of 2.5 kNm/rad.
Understanding Resistance and Capacity
Resistance and capacity are crucial factors in the selection of scaffolding couplers. The slipping force, represented in kiloNewtons (kN), is the amount of force a coupler can withstand before slipping occurs. Cruciform stiffness, shown in kiloNewton-meters per radian (kNm/rad), measures the coupler's resistance to deformation under load. Cruciform bending, in kiloNewton-meters (kNm), indicates the bending moment that the coupler can endure.
It's essential to choose the right coupler for the task at hand, considering the loads it will need to bear and the conditions it will face. Always ensure that the selected coupler meets the required safety standards and is appropriate for the specific application.
In conclusion, understanding the types and capacities of scaffolding couplers is vital for anyone involved in the scaffolding industry. It not only ensures the safety of workers but also enhances the efficiency and effectiveness of construction work. So, always make an informed choice when it comes to selecting your scaffolding couplers.
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