Umbrella Ribs and Stretchers
2.1 Stick Umbrella Ribs
1) Stick Umbrellas Metal Ribs
2) Stick Umbrellas Fiberglass Ribs
2.2 Folding Umbrella Long Ribs
1) Folding Umbrella Aluminum Long Ribs
2) Folding Umbrella Metal Long Ribs
3) Folding Umbrella fiberglass Long Ribs
2.3 Stick Umbrella Stretchers
2.4 Folding Umbrella Stretchers
These two parts work together to ensure that the canopy looks as intended when opened. The ribs underneath are the supporting system for the cover. In fact, their design determines the form the canopy will take.
On the other hand, stretchers begin from the runner and are tasked with connecting all the ribs to the shaft. They help the umbrella cover to stretch as needed and prevent any unsightly creases.
We can use vernier calipers to measure the ribs& stretchers, difference umbrella size used difference ribs and stretchers. The more thickness ribs&stretchers, the frame will be stronger.
Ribs can either be U-shaped or round shape.
These golf umbrella frames show how the ribs and stretchers will eventually assist the canopy.
2.1 Stick Umbrella Ribs
For stick-type umbrellas, there are six options for the total rib count: 6, 8, 10, 12, 14, and 16 ribs.
There are two kinds of material of stick umbrella ribs, one is metal, the other is fiberglass.
Metal ribs are easily broken when used on the strong wind.
Compare with metal ribs, fiberglass ribs is stronger than metal “U” ribs, the fiberglass ribs is windproof and no easy broken, but the price is more expensive.
Usually, kids umbrellas, golf umbrellas, and middle-high quality umbrellas use fiberglass ribs.
1) Stick Umbrella Metal Ribs
Metal ribs have 2 shapes. One is U shape, the other is round shape.
shaped ribs can have the following measurements: 5.6mm, 5.8mm, 6.0mm, 6.3mm, and 7.0mm.
For round ribs, the diameter of ribs has the options: 1.5mm, 1.6mm, 1.65mm, 1.7mm, 1.8mm, 1.9mm, and 2.0mm.
Whichever you pick, you can pick among the four surface finishes that are also applied to the metal stick shaft: nickel coating, black coating, chrome plating, and glitter coating.
2) Stick Umbrella Fiberglass Ribs
This material only comes in round shape, but there are eight sizes: 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.5mm, 4.0mm, 4.5mm, and 5mm.
Clients typically prefer either a white or black color, but you can ask for any other color.
Below, you’ll see fiberglass ribs along with an aluminum shaft
2.2 Folding Umbrella Long Ribs
The folding variant can have 6, 8, or 10 ribs.
1) Folding Umbrella Aluminum Long Ribs
The thickness comes at 60T, but this type doesn’t just rely on aluminum.
The long ribs here have two parts. First comes the aluminum part, then the second part is made of either round metal or fiberglass, the latter material being chosen for its windproof characteristic.
The aluminum ribs will be in silver color.
2) Folding Umbrella Metal Long Ribs
there are four other thickness options: 30T, 35T, 40T, and 45T. As expected, you can pick among nickel coating, black coating, chrome plating, and glitter coating for the surface finish.
3)Folding Umbrella Fiberglass Long Ribs
fiberglass grants umbrellas better resistance against harsh winds. There are six thickness options: 2.8mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, and 5mm.
fiberglass bending is not easy to break.
2.3 Stick Umbrella Stretchers
1) Metal Stretchers
These stretchers for U-shaped ribs come in 5.6mm, 5.8mm, 6.0mm, 6.3mm, or 7.0mm.
2) Fiberglass Stretchers
Umbrellas utilizing round ribs can have fiberglass stretchers with the following size options: 2.8mm, 3.0mm, 3.5mm, 4mm, 4.5mm, and 5mm.
2.4 Folding Umbrella Stretchers
1) Metal Stretchers
There are four thickness options: 30T, 35T, 40T, and 45T.
2) Aluminum Stretchers
The thickness options: 60T.and it is lightweight.
