The step board, also known as stair step board, steel ladder step board and ladder pedal, is a kind of stair board used for platform. Its installation methods include welding connection and bolt connection. The step plate fixed by welding can be directly welded to the ladder beam.



brief introduction

Step board

Step board

The step board fixed by welding is directly welded to the ladder beam, and the side plate without the step board is relatively economical and durable, but it is not easy to disassemble. The two sides of the step board fixed by bolts need to be thickened. Holes are drilled on the side plate. The installation is directly fixed by bolts, which can be recycled and reused. Customers can be customized according to their own actual needs, and can be made into various sizes of appropriate types of steel grating to match the corresponding stairs [1].



model

Step board model

Step board model

Welding fixation: ST1, ST3, ST5

Bolt fixation: ST2, ST4, ST6

The width of treads is usually between 0.5 m and 1 m.

Marking and tolerance of step board

ST4 in ST4 - - (ra325 / 30) ST4 - step plate model, ra325 / 30 steel grating model

Step board tolerance: width W ± 3mm, length l-3mm.



Characteristic use

(1) The installation of step board is very simple and does not need complicated installation;

(2) Good ventilation, lighting, heat dissipation, explosion-proof and anti-skid performance;

(3) High strength, light structure and durability of step board;

(4) Maintenance is very simple, prevent dirt.

Step boards are widely used in power plants, waterworks and other factories, as well as platforms and corridors in municipal engineering and environmental sanitation engineering, as well as ground platforms in large places such as cinemas, visiting platforms and parking lots [2].



main parameter

Recommended width: from the economic point of view, it is recommended to use modulus width (125, 155, 185, 215, 245, 275 for Series 1, 125, 165, 205, 245, 275 mm for Series 2) as 100 mm multiple length (such as 500, 600, 700, 800, 900, 1000, 1200 mm, etc.).

Recommended length of stair treads:

Maximum length (mm)

Section size of flat steel

25×3

25×5

32×5

40×5

Series 1

Five hundred and fifty

Nine hundred

one thousand and three hundred

one thousand and six hundred

Series 2

Four hundred and fifty

Seven hundred and fifty

one thousand and two hundred

one thousand and five hundred

Series 3

-

Five hundred and fifty

Eight hundred and fifty

one thousand three hundred and fifty

(T2 and T4) bolt center distance (mm): 1

"A" (screw hole center distance)

Forty-five

Seventy-five

Seventy-five

One hundred

One hundred

One hundred and fifty

One hundred and fifty

Front guard board: the size of the protection plate is 65mm × 5mm, and the angle can be cut only when the customer needs it. It can be customized according to special specifications.

Welding standard: the edging of both sides of the plate and each load-bearing flat steel adopt unilateral welding, and the weld is not less than 3mm fillet welding [3].



classification

Anti skid step board



Raw material: toothed flat steel, the general material is Q235. The difference between tooth shaped flat steel and ordinary flat steel is that there are uneven tooth marks on one side of flat steel. (mainly to prevent slipping. We mainly use longitudinal cutting flat steel and cutting steel plate

Twist steel: also known as twisted square steel, there are generally 5x5 6x68x8 square steel, twisted into steel.

characteristic:

(1) It is welded by flat steel with serrated one side. Besides the characteristics and application of ordinary steel grating, it also has strong anti-skid ability, especially suitable for wet and greasy places, offshore oil production platform, etc;

(2) Hot dip galvanizing surface treatment, with strong anti rust, 30 years maintenance free and replacement free. It can be used to connect the ditch cover and frame with hinge, which is anti-theft, safe and easy to open;

(3) Using high strength carbon steel, the steel grating has high strength: the strength and toughness are much higher than that of cast iron, which can be used in large span and heavy load environment such as wharf and airport;

(4) Large mesh has the best drainage: the leakage area reaches 83.3%, which is the best choice for outdoor stairs;

(5) Beautiful appearance: simple line, silver appearance, modern idea, material saving and investment saving: the price is lower than that of cast iron when it is large span and heavy load;



Stair treads



Stair step board is a kind of deep-processing product which is composed of steel grating, anti-skid strip and side plate. It is mainly used for stepping on steel ladder, so it is usually called stair step board, referred to as stair pedal. Specification of stair treads: stair treads need to be manufactured into various sizes to match the corresponding stairs. However, from the perspective of economy and safety, we suggest that you adopt the following specifications:

T325 / 30 / 100 (applicable to stair step width greater than 215mm and not more than 305mm)

T255 / 30 / 100 ((applicable to stair tread width greater than 215mm and not more than 305mm)



Steel ladder step board



It is also called stair step board. According to the presence or absence of front guard board and connection with ladder beam, it can be divided into four forms, expressed as T1, T2, T3 and T4.

1. From the economic point of view, it is suggested to adopt the recommended width as far as possible;

2. The tolerance of stair step board: width W ± 3mm, length l-3mm.

In addition, we can provide stair step board with different anti-skid front guard, and the size can be specified as required. In general, we recommend the following sizes of front guard.

The steel ladder step plate is made of steel grating (the steel grating is a kind of metal product which is cross arranged by flat steel according to certain spacing and cross bar, and welded into a metal product with square grid in the middle). The surface of the product is generally treated by hot dip galvanizing and electro galvanizing. The steel ladder step board is mainly used for industrial platform, ladder pedal, handrail, passage floor, railway bridge side road, high-altitude tower platform, drainage ditch cover, well cover, road fence, three-dimensional parking lot, office, school, factory, enterprise, sports ground, garden villa fence. It can also be used as the external window of residential buildings, balcony guardrail, highway, railway guardrail, etc It is a kind of deep-processing product which is composed of plate with anti-skid strip and side plate.



type

(1) According to the installation of steel ladder step board, it is divided into welding fixed ladder pedal and bolt fixed ladder pedal. Among them, the steel grating is the ladder step fixed by welding