Steel Stairs And Handrails Fabrication


Stairs are the most common use in almost all building that has stack components of building . When it come to fabrication of stairs it important that everything is welded proper and all fit up made right . Welding of all parts must be 100%  . Quality steel stairs are an essential part of any construction project where general access to multiple levels is required. We have the equipment and materials to fabricate a variety of star configurations such as spiral staircases, grate stairs, 4′, 5′ or double wide or pan stairs for concrete pouring. Located in New Berlin, Wisconsin Superior Structural Corporation has built a solid reputation, since 1969, by producing large, high quality steel weldments and fabrications. We employ highly qualified welders to meet our commitment of prompt delivery to our customers. Our bids are prepared per your specifications and will meet municipal codes. Our certified welders can build stairs per your specifications, including welding; grinding; and prime painting, galvanizing, or epoxy paint finishing. We can install your stairs as allowed by OSHA or hire authorized contractors.

How do you make steel stairs?read

Here are some of the basic way to make  steel stairs “Tread: The treads is the piece of steel
that makes up the steps of the stair.
Figure 1: Stair
Terminology
The tread can be made from grating or
from pans (both shown in Figure 1).
Grating is typically used in industrial
buildings while pans are usually used in
commercial structures. The grating type
of tread is plate, but the pan shape dips
down so that the concrete can be poured
into its base.
Sanitary-type pans, which are common in hospitals, have an additional lip
that prevents dirt from falling into the
corner of the pan.
(Pan and grating treads are shown in
Figure 2.)
Stringers: The stringers support the
ends of the treads. Stringers are often
rectangular hollow sections, channels or
plate. The top of the stringer is connected either to a supporting beam or to a
dog leg (see Figure 3).
The bottom of the stringer is connected to a supporting beam, a dog leg, or
the ground. If attached to a supporting
beam, the stringer can be bolted or
welded. If attached to a dog leg, the
stringer will be welded.
Supporting Beam: The supporting
beam supports the stringer or the dog
leg (if it exists). Each stringer can be
independently supported. Alternately,
both stringers can be supported with
the same supporting beam. The supporting beams are usually wide flange
sections or channels.
Dog legs: The location of the supporting beams determines whether dog legs
are actually needed (as shown in Figure
4). A dog leg is needed when a viable
connection cannot be made to the supporting beam directly from the stringer.
The dog leg can be the support for the
landing at the top of the stair, if one
exists.
Special pans: These are required at
the top and bottom of a pan stair. One
special pan closes the stair against the
concrete or platform, and the other pan
closes off the top of the stair


the cost of steel stairs?

Of course, there are interior stairs and exterior stairs. Since interior stairs generally consist of more steps, they’re typically more expensive than exterior stairs. Breaking it down even further, interior stairs include stairs leading to the second floor, basement stairs and attic stairs. Since designs and installations are different, they come in at different price points:

  • Main Staircase: The most important staircase in your home will likely cost approximately $2,400. The main staircase catches your eye as soon as you walk into the home. The design demands attention and as such, typically costs more than any other interior staircase.
  • Basement Staircase: Most people don’t give too much thought to their basement stairs. In fact, some don’t add padding or paint. Since design is not a focus here, expect the cost to hover around $1,400.

Attic Staircase: Even less expensive are attic stairs. They generally drop from the ceiling and are thin, but strong pieces of wood. The cost to install attic stairs should not exceed $1,000.

Cost to Build a Staircase

It costs the average homeowner $1,900 to build a staircase. This project ranges from $920 to $2,880 but can cost as low as $350 and as high as $5,000. However, you could pay up to $10,000 for more extensive or custom projects.

Additional considerations and costs

  • There are also costly freight and delivery charges that must be added into the budget as well, and these tend to average between $300 and $600.
  • Most pre-built interior stairs will come in the desired finish, such as staining or painting, but the homeowner will also have to consider the use of any moldings too. The average costs of simple quarter-round stock along with any baseboards will average between $250 and $400.
  • Many homeowners opt to use a spiral kit staircase that relies on steel instead of wood. These are far less expensive and cost between $400 to $1500, though there are structural considerations with their use. There are also combination kits which rely on metal framing and wooden treads, and which are available for prices ranging between $1500 to $5000, depending upon the design.

Question and answers about stairs

Question 1: What “strength to carry safely” level is expected of the stair as far as resistance to this load: Yield or allowable, i.e. to failure or to allowable stresses used for steel design?

Reply: The design of fixed stairways and their components must be based on their ultimate strength [yield stress (FY) or ultimate stress (FU)] and not on the allowable stresses as given in the Allowable Stress Design method of the American Institute of Steel Construction, Ninth Edition.

Question 2: Where should it [1000 lbs load] be applied: Stringers, Stair treads?

Reply: From a design standpoint, the specified design loads (e.g., normal live load and moving concentrated load of 1000 lbs) must be placed where the maximum stress is experienced by the individual structural components of the stair system.

Question 3: Is it a concentrated load or spread over the whole stair tread area?

Reply: 29 CFR 1910.24(c) states; “Fixed stairways shall be designed and constructed to carry a load of five times the normal live load anticipated but never of less strength than to carry safely a moving concentrated load of 1,000 pounds” [emphasis added]. Therefore, with respect to the design calculation, the normal live load is spread over the whole stair tread area and the moving concentrated load is considered to be a point load applied at a location on the stair system where the maximum stress would be experienced by the system (the 1000 lbs loading criteria is a minimum).


Fire escape addition to stairs

fire escape is a special kind of emergency exit, usually mounted to the outside of a building or occasionally inside but separate from the main areas of the building. It provides a method of escape in the event of a fire or other emergency that makes the stairwells inside a building inaccessible. Fire escapes are most often found on multiple-story residential buildings, such as apartment buildings. At one time, they were a very important aspect of fire safety for all new construction in urban areas; more recently, however, they have fallen out of common use. This is due to the improved building codes incorporating fire detectors, technologically advanced fire fighting equipment, which includes better communications and the reach of fire fighting ladder trucks, and more importantly fire sprinklers. The international building codes and other authoritative agencies have incorporated fire sprinklers into multi-story buildings below 15 storeys and not just skyscrapers.

Fire escape stairs

Fire escape stairs are considered as the preferred solution for safe emergency evacuations and fire escapes. There are 4 important parameters for the design: the dimensioning, the choice of material, the layout and the available options.

A fire escape stair is a special kind of emergency exit, usually mounted to the outside of a building or occasionally inside but separate from the main areas of the building. It provides a method of escape in the event of a fire or other emergency that makes the stairwells inside a building inaccessible. The metal escape stair consists of a number of horizontal platforms, one at each story of a building, with ladders or stairs connecting them. The platform and stairs are usually open steel gratings, to prevent the build-up of ice, snow, and leaves.

Metal fire escape stairs need to be stable and trustworthy at all times so they may not be worn by rust. For this reason ADTO Mall stairs use only high quality aluminum that is anodized for extra protection. ADTO Mall has the knowledge and experience all over the world to get the ADTO stairs certified.


Why stairs need Handrails

Handrails are required on both sides of stairs and must be continuous within the full length of each stair flight. Inside handrails on switchback or dogleg stairs must be continuous.

Stairway Handrails

Switchback stair and landing. Notes and labels: 12” min. horizontal top extension in same direction as stair flight (§505.10.2); 34” - 38” (consistent height) above nosing to top of gripping surface (§505.4), Sloped bottom extension 1 tread depth min. beyond last riser nosing in same direction as stair flight (§505.10.3), Handrails must return to a wall, guard, or floor and cannot rotate within fittings (§505.10.2, §505.10.3), Inside handrails at switchback/ dogleg turns must be continuous (extension not required) (§505.3), Top and sides of gripping surface cannot be obstructed; bottom can be obstructed up to 20% of the length (§505.6), In alterations, full handrail extensions are not required where they would project into circulation paths and pose a hazard (§505.10, Ex. 3).

design compassRecommendation:  In facilities that primarily serve children, a second set of stairway handrails 28” high maximum above stair nosings is advisable. A vertical clearance 9” minimum between upper and lower handrails will help prevent entrapment.

 

Handrail Extensions [§505.10]

Handrail extensions at the top and bottom must return to walls, guards, or floors and horizontal portions must comply as protruding objects. The length is measured to the start of the return radius.

 Top horizontal handrail extension 12” long min. at stairs. Note: Handrails at the top of stairways must extend 12” minimum horizontally above the landing beginning directly above the first riser nosing or be continuous to the handrail of an adjacent stair flight (§505.10.2).  Bottom handrail extension sloping beyond the last riser nosing for a distance at least equal to one tread depth. Note: Handrails at the bottom must extend beyond the last riser nosing at the slope of the stair flight for a distance at least equal to one tread depth or be continuous to the handrail of an adjacent stair flight protruding objects. a
Top horizontal handrail extension with P-shaped return to post; bottom edge of return is 27” high max. Notes: treatment as protruding object not required. Objects mounted on posts with leading edges higher than 27” cannot protrude into circulation paths more than 12” (§307.3). With handrails, this applies only to horizontal portions, not sloped portions. Horizontal top extensions that return to posts can protrude any amount if the leading edge is 27” max. above the finish floor or ground. Recommendation: Treat free-standing bottom extensions as protruding objects if they have leading edges higher than 27”.

Mezzanine and stairs

Mezzanine stairways are used to provide instant access to all mezzanine structures. Used mezzanine stairs from ASI for in-plant offices, mezzanines, catwalks, and platforms are all available. All factory provided used mezzanine stairs meet OSHA or BOCA requirements. We offer several types of used mezzanine stairs which includes double landing, internal, and more. Used mezzanine stairs are less than half the price of new, and designed with an all welded steel construction for added durability.

mezzanine floor

The minimum height of building a mezzanine floor from the ceiling is 440 centimeters. This translates to approximately 14 feet between the ceiling and the ground floor. This is the regulation to consider excellent mezzanine flooring. This distance should be followed strictly, regardless of the function of the mezzanine floor. This is to create the right size of headroom.

The floor size of the mezzanine flooring should be a third of the size of the main ground floor. Though some experts are divided on this, some say it can be half the original floor. Strictly following the difference between the mezzanine floor and the ground floor, I think the mezzanine floor should be smaller. If your mezzanine floor is smaller, it will serve an aesthetic function to your room.


Cost of Gate Fabrication

Basic  gate installs cost around $7,000. With extra features installed, such as sensors and intercoms, the total price of labor and materials could reach $12,000.

Electric Driveway Gate Expenses
Gate Expenses Price Range
Hourly Labor Rate $30-$80
Gate $500-$6,000
Posts $25-$100
Concrete $10-$50
Opener Kit with Motor and Arm $850-$4,500
Keypads $100-$500
Sensors $300-$500
Intercom $350-$2,000
Dual Bollards $3,000-$6,000

Automatic models that open via remote control, keypad or voice sensor are more expensive, but also more convenient. These electric gates allow people to come and go without requiring you to physically open and close the barrier.

Automatic Gate Price List by Material

Material Price Range Characteristics
Aluminum $2,000-$4,000 Lightweight, but can dent
Steel $600-$4,000 Low maintenance, but heavy
Wrought Iron $600-$4,000 Decorative, but hard to install
Wood $300-$4,000 Beautiful, but high maintenance
Vinyl $200-$1,000 Inexpensive, but damages easily

Material costs can run between $200 to $4,000+ with vinyl at the low end of the range and aluminum costing the mostIf you elect to have automatic bollards installed, they could run you around $3,000 apiece

The material you use for your security gate will greatly affect the total cost of your project. Decide on your ideal price for security and the aesthetic look you desire, and then compare prices of the models that fit what you are seeking.