Type of Equipment

Temporary Construction Stairs

Temporary construction stairs are stair systems installed during the construction phase of a building or structure to provide safe, OSHA-compliant personnel access between levels before permanent stairs are complete and available for use — serving the crews who build the structure throughout the construction sequence from structural framing through interior finishing, and removed or converted to permanent use when the building's own stair systems are commissioned. Find temporary construction stair vendors and scaffold contractors near you on Scaffold Exchange.

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What Are Temporary Construction Stairs?

Definition: Temporary construction stairs are stair systems installed within or adjacent to a structure under construction to provide the building's workforce with safe vertical access between floor levels throughout the construction program — serving as the primary means of personnel access between floors from the point at which the first elevated deck is poured or framed until permanent building stairs are installed, inspected, and made available for construction use. Temporary construction stairs are distinct from adjustable construction stairs, which are portable units repositioned repeatedly at individual access points, and from scaffold stair towers, which are freestanding modular systems standing independently outside the building envelope. Temporary construction stairs are typically installed within the building's permanent stair shafts or core using the structure's own floor openings, stair pans, or temporary stair stringers — occupying the footprint of the permanent stair so that construction crews have stair access in the location where the building's occupants will eventually use the finished stair, without requiring a separate freestanding access structure on the floor plate.

OSHA 29 CFR 1926.1051 requires that a stairway or ladder be provided at all personnel points of access where there is a break in elevation of 19 inches or more. On multi-story construction projects, this requirement creates an obligation for stair or ladder access at every floor level throughout the construction sequence — an obligation that temporary construction stairs satisfy more safely and efficiently than ladders for the high-traffic, two-way, material-carrying access that construction crews require between floors throughout the workday. OSHA 29 CFR 1926.1052 governs the dimensional and structural requirements that temporary stairways within a structure under construction must meet, including installation angle, riser and tread uniformity, landing dimensions, and stairrail and handrail requirements. Where permanent stair pans are in place but not yet filled with concrete, 29 CFR 1926.1052(b) specifically governs the temporary tread and landing requirements that allow those pan stairs to carry foot traffic before their permanent infill is complete.

For project managers, safety professionals, and scaffold contractors, temporary construction stairs represent the intersection of schedule, safety, and logistics on multi-story building projects — the stair system must be installed ahead of the floors it serves, maintained in safe condition through the construction sequence, and managed around the permanent stair installation work that will eventually replace it. Early and coordinated planning of the temporary stair program is essential to ensure that stair access is available when each floor is opened to construction crews rather than discovered as a gap after crews are already working at elevation without compliant access.

Types of Temporary Construction Stair Systems

Temporary construction stairs take several forms depending on the building structure type, the permanent stair design, and the contractor's access strategy for the project.

Pan Stairs

Temporary Treads on Permanent Stair Pans

In concrete-framed buildings with permanent steel pan stairs, the pans are typically installed as part of the structural steel package well before concrete placement — creating a stair framework in the stair shaft that can serve as the temporary construction stair with the addition of temporary tread covers. OSHA 29 CFR 1926.1052(b) requires that foot traffic on pan stairs with unfilled pans be prohibited unless the stairs are temporarily fitted with wood or other solid material at least to the top edge of each pan, installed full-width and full-depth of the stair. Temporary tread covers installed per this requirement provide a serviceable construction stair within the permanent stair footprint with minimal additional material.

Prefab Units

Prefabricated Temporary Stair Units

Prefabricated temporary stair units are purpose-built stair assemblies — typically aluminum or steel — designed for installation within a building's stair opening or along its exterior to provide construction access before permanent stairs are available. These units are fabricated to a defined rise-and-run geometry, delivered to the job site, and installed in the stair shaft or at the building perimeter using the floor structure as the top and bottom support points. They are removed when permanent stairs are commissioned and can be reused on subsequent projects, making prefab temporary stairs an economical alternative to built-in-place temporary stair construction on projects where the stair geometry is consistent enough to accommodate a standard unit.

Built-In-Place

Carpenter-Built Temporary Stairs

On projects where prefabricated units do not fit the stair opening geometry or where the contractor's preference is site-built construction, temporary stairs are built in place by the carpentry crew from dimensional lumber, plywood treads, and site-fabricated stringers. Carpenter-built temporary stairs are fully customizable to any rise, run, width, or landing configuration but require significant labor to build, modify, and remove, and do not carry reuse value beyond the material recovery of the lumber. They are most common on projects without standard stair shaft dimensions or on smaller projects where a prefabricated unit's procurement lead time or cost is not justified.

Scissor Stairs

Scissor or Switchback Temporary Stair Systems

Some multi-story buildings use scissor stair configurations in which two independent stair flights share a common stair shaft, with each flight serving alternating floors and reversing direction. Installing temporary construction stairs in a scissor stair shaft requires attention to the shaft geometry to ensure both flights are served with compliant temporary access — typically using prefabricated units or carpenter-built stairs fitted to each flight's specific rise and run within the shared shaft. The scissor configuration adds complexity to the temporary stair program relative to a straight-run or switchback stair shaft.

Core Stairs

Structural Core Temporary Access Stairs

In high-rise and core-and-shell commercial construction where the building's structural concrete core is poured ahead of the floor plate, temporary stair access within the core is often established very early in the sequence — sometimes using the core's permanent stair shaft as the access route with temporary treads before the core's architectural finishes, handrail systems, and fire-rated enclosures are installed. Core stair temporary access programs require close coordination between the concrete contractor, the structural steel or concrete sequence, and the temporary stair installer to ensure access within the core is available as each floor of the core is opened.

Exterior

Exterior Temporary Stair Systems

On projects where the building's internal stair shafts are not accessible or not suitable for temporary stair installation — such as renovation projects where existing occupied stairs cannot be used for construction traffic, or new construction where the stair shafts are blocked by formwork or other work — temporary stairs may be installed on the exterior of the building structure, connecting floor slabs through openings in the building envelope or along the building perimeter. Exterior temporary stairs typically require a more robust structural solution than interior stairs because they are exposed to wind and weather and must be designed for the lateral loads that interior stairs within the building envelope do not experience.

Where Temporary Construction Stairs Are Used

Temporary construction stairs appear on any multi-story project where permanent stairs are not available for construction use throughout the build sequence.

Multi-story commercial office construction — providing floor-to-floor construction access throughout the structural and interior phases of commercial office towers before permanent core stairs are commissioned for construction use

Multi-family residential construction — serving construction crews through the framing and finishing phases of apartment, condominium, and mixed-use residential buildings where permanent stairs are among the last systems commissioned before occupancy

Healthcare facility construction — providing construction crew access in hospital and medical facility buildings where infection control, security, and occupancy staging may restrict use of permanent stairs for construction traffic even after they are installed

Parking structure construction — serving construction crews in precast or cast-in-place concrete parking structures where the ramp-and-deck geometry creates elevation changes throughout the structure that require stair access at multiple access points

Industrial facility construction — providing multi-level access in industrial buildings, process facilities, and manufacturing plants where mezzanine levels, equipment platforms, and elevated floor plates require construction stair access throughout the build

High-rise concrete core construction — serving construction crews in high-rise buildings where the concrete core is poured ahead of the floor plate and must provide stair access to each core level as the core advances ahead of the floor construction sequence

Renovation and gut-rehab projects — providing construction crew access in occupied or partially occupied buildings where existing permanent stairs cannot be used for heavy construction traffic during renovation phases

Education and institutional construction — serving construction crews in school and university buildings where the project's phasing around academic calendars creates construction access requirements independent of the building's permanent stair commissioning schedule

Temporary Construction Stairs vs. Other Access Systems

Temporary construction stairs serve a specific position in the construction access hierarchy — understanding how they differ from alternative access systems helps project teams assign the right solution to each access requirement.

Temporary Construction Stairs

In-structure stair access installed within the building footprint

Installed within or adjacent to the permanent stair shaft — occupies the building's own stair access route rather than requiring a separate freestanding access structure on the floor plate
Serves the full construction program from first elevated deck through permanent stair commissioning
Multiple system types: temporary tread covers on pan stairs, prefabricated units, carpenter-built, exterior systems
Governed by OSHA 29 CFR 1926 Subpart X — 1926.1052 for dimensional requirements, 1926.1052(b) for pan stair temporary service

Z-Stack Stair Towers

Freestanding modular scaffold stair tower

Freestanding structure independent of the building — appropriate where the building's stair shafts are not suitable for temporary stair installation or where exterior access is preferred
Higher cost and more complex installation than in-shaft temporary stairs but provides access without occupying any interior floor plate area
See the Z-Stack Stair Towers page for modular scaffold stair tower details

Adjustable Construction Stairs

Portable height-adjustable single-run stair units

Best for individual access points at varying elevations that require rapid deployment and frequent repositioning — not a substitute for a fixed in-shaft temporary stair serving the full building height
Complements in-shaft temporary construction stairs at specific access points where the permanent stair route is blocked or where spot access is needed between main stair locations
See the Adjustable Construction Stairs page for portable adjustable stair unit details

Mast Climber Aerial Platforms

Powered vertical access platform

Provides powered vertical access for workers and materials on building exteriors — not a substitute for stair access within the building structure for general crew circulation
Complements temporary construction stairs on high-rise and facade work programs where exterior access supplements interior stair access
See the Mast Climber Aerial Platforms page for powered vertical access platform details

Find Temporary Construction Stair Vendors Near You

Scaffold Exchange connects project managers, general contractors, and scaffold contractors with temporary construction stair vendors and installation contractors across the United States. Search the vendor map for temporary stair suppliers near your project and request quotes through the platform.

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OSHA Compliance and Planning Guidance

OSHA 29 CFR 1926 Subpart X governs stairways and ladders on construction sites and establishes the requirements that temporary construction stairs must meet throughout the construction program. The trigger for stair or ladder access at personnel access points is an elevation break of 19 inches or more per 29 CFR 1926.1051. Where stairways are provided, 29 CFR 1926.1052 requires installation between 30 and 50 degrees from horizontal; uniform riser height and tread depth with variations no greater than one-quarter inch; landings of at least 30 inches in the direction of travel and 22 inches in width at every 12 feet of vertical rise; and stairrails and handrails on stairways with four or more risers or rising more than 30 inches. Handrail height must be between 30 and 37 inches from the upper handrail surface to the tread surface. The specific requirements for pan stair temporary service at 1926.1052(b) require that foot traffic on pan stairs with unfilled pans be prohibited unless the stairs are temporarily fitted with wood or other solid material at least to the top edge of each pan, installed full-width and full-depth, and replaced when worn below the pan top edge. Temporary construction stair planning on multi-story projects should address the full construction sequence from first elevated deck to permanent stair commissioning — identifying which floors are served by each stair run, how stair access advances with the vertical construction sequence, how the temporary stair interfaces with permanent stair installation work that will replace it, and how stair access is maintained for the floors below while permanent stair installation proceeds above. Fall protection at the top stair landing, at open floor edges adjacent to the stair shaft, and at open sides of the stair itself must be addressed under 29 CFR 1926 Subpart M in coordination with the temporary stair program rather than treated as separate obligations that can be managed independently.

Plan the temporary stair program before the first elevated deck is poured — stair access must be available when the floor is opened to construction crews, not installed after crews are already working at elevation without compliant access
Confirm stair pitch is between 30 and 50 degrees from horizontal for all temporary stair runs per 29 CFR 1926.1052(a)(2)
Verify riser height and tread depth uniformity throughout each stair flight — confirm variation does not exceed one-quarter inch across the full flight per 29 CFR 1926.1052(a)(3)
Install temporary tread covers on pan stairs before opening the stair to foot traffic — covers must be solid material, full-width and full-depth of the pan, and at least to the top edge of each pan per 29 CFR 1926.1052(b)(1)
Install stairrails and handrails on all temporary stair runs with four or more risers or rising more than 30 inches — confirm handrail height is 30 to 37 inches above the tread surface per 29 CFR 1926.1052(c)(1) and (c)(6)
Provide landings at least 30 inches deep and 22 inches wide at every 12 feet of vertical rise per 29 CFR 1926.1052(a)(1) — confirm landings are in place before the stair is opened to traffic
Address fall protection at the top landing and at open floor edges adjacent to the stair shaft under 29 CFR 1926 Subpart M — the temporary stair does not eliminate the fall hazard at the landing level or the open floor edge around the shaft
Maintain stair access to all occupied floors below while permanent stair installation proceeds on upper floors — plan the sequence for transitioning from temporary to permanent stair access floor by floor to avoid leaving any level without compliant stair access during the transition

OSHA Standard 29 CFR
1926.1052

Stairways — Construction Stair Requirements

OSHA 1926.1052 →

Frequently Asked Questions

The three terms describe different solutions in the temporary stair access landscape that serve different needs and should not be used interchangeably. A temporary construction stair is a stair system installed within or adjacent to a building's permanent stair shaft or floor structure to provide in-structure vertical access throughout the construction program — it occupies the building's own stair access route and typically serves multiple floors continuously from the time the first elevated deck is available for construction through the point when permanent stairs are commissioned. A temporary construction stair is a program-duration access solution rather than a spot access tool. An adjustable construction stair is a portable, height-adjustable unit designed to be repositioned repeatedly at individual access points — floor-to-slab transitions, grade-to-slab access points, embankments, or scaffold platforms — where rapid deployment and frequent relocation matter more than multi-floor continuous coverage. A scaffold stair tower is a freestanding modular system that stands independently outside the building envelope or within the site, providing multi-story stair access without attaching to the building structure. On most large multi-story projects, all three types are present simultaneously: the temporary construction stair covers the building's primary vertical circulation, scaffold stair towers provide external access for facade and envelope crews, and adjustable stair units serve individual spot access points throughout the site where the main stair route is too far or a full tower is unnecessary.

OSHA 29 CFR 1926.1052(b) contains specific requirements for foot traffic on pan stairs — the steel-pan stair frames installed in concrete buildings whose pans are later filled with concrete to create the permanent treads. The standard prohibits foot traffic on pan stairs with unfilled pans during construction unless the stairs are temporarily fitted with solid tread covers meeting the following requirements: the covers must be made of wood or other solid material; they must be installed full-width and full-depth of the stair tread; they must be installed at least to the top edge of each pan; and they must be replaced when worn below the level of the pan top edge. The same requirements apply to landings — temporary landing covers must be full-width and full-depth of the landing pan. Importantly, the covers must be on the stair before foot traffic begins — it is not permissible to allow crews to use an uncovered pan stair while temporary covers are being prepared or sourced. The solid material requirement means that plywood cut to the pan dimensions is the most common solution, secured in place to prevent displacement under foot traffic. The temporary tread covers do not eliminate the requirement for stairrails and handrails on the temporary stair — the handrail requirements of 1926.1052(c) apply to the temporary stair with covers in place, not only after permanent handrails are installed.

The temporary stair program should be planned during preconstruction — before the structural phase begins — and coordinated with the structural steel, concrete, and permanent stair subcontractors whose work creates and eventually closes the temporary stair access requirement. The most common failure mode in temporary stair planning is reactive rather than proactive engagement: a project pours its first elevated deck without a temporary stair plan in place, discovers that OSHA requires stair or ladder access at the new floor level, and scrambles to install a compliant access solution while crews are already working at elevation with ladder access or no access. Proactive planning identifies the floor-by-floor stair access requirements before the structural sequence begins, determines which temporary stair type best fits each stair shaft's geometry and the project's budget and schedule, sequences the temporary stair installation with the structural frame and deck pours so that stair access is available when each floor opens for construction use, and plans the transition from temporary to permanent stair access floor by floor to avoid gaps in coverage during the permanent stair installation sequence. On high-rise projects where the stair shaft may span thirty or more floors and multiple stair runs, the temporary stair program is a significant logistical component of the project's access plan that deserves the same preconstruction attention as hoisting, material delivery, and crane planning.

Permanent stairs can be used for construction traffic once they are installed, structurally sound, and meet the applicable OSHA requirements for the construction phase — and on many projects, commissioning permanent stairs for construction use as early as possible is the most efficient way to serve the upper-floor construction crews without maintaining a separate temporary stair program for the full building height. However, several conditions must be in place before permanent stairs are opened for construction traffic. The stair structure must be complete and properly connected to the floor structure at each landing. Temporary tread covers must be installed on any unfilled pan treads per 29 CFR 1926.1052(b). Stairrails and handrails must be installed or temporary handrails must be provided per 29 CFR 1926.1052(c) if the permanent handrail system is not yet in place. Open sides of the stair shaft at each floor level must have fall protection under 29 CFR 1926 Subpart M. In renovation projects where permanent stairs serve both construction traffic and building occupants, the construction manager must address the interface between construction and occupant traffic — including the debris, noise, and contamination that construction crews introduce — before routing construction crews through occupied permanent stairs. In new construction, permanent stairs may have fire-rated enclosures that are not yet complete, creating the question of whether the stair enclosure's incompleteness affects the stair's usability for construction access — a determination that typically involves coordination with the authority having jurisdiction and the project's fire protection engineer.

The top landing of a temporary construction stair opens onto a floor or deck level where fall hazards at open edges, floor openings, and the stair shaft itself must be addressed under OSHA 29 CFR 1926 Subpart M — the fall protection standard — in addition to the stair requirements of Subpart X. The stairrail on the stair itself provides fall protection along the stair flight, but at the top landing where the stair terminates and the worker steps onto the floor deck, the stairrail ends and the floor's own perimeter and opening protection must take over. Open floor edges within six feet of the top landing require guardrail, safety net, or personal fall arrest protection under 1926.502. The stair shaft opening at each floor level — the hole through the floor deck through which the stair passes — must be protected by guardrails or covers on all sides except the side where the stair handrail provides protection, with particular attention to the unguarded sides of the opening where workers on the landing could step into the shaft. On high-traffic temporary construction stairs in active multi-story buildings, the shaft opening protection at each floor level is one of the most consistently cited fall hazard exposures — the opening is large, workers are familiar with it and may become complacent, and the fall distance below the opening increases with each floor. Consistent guardrail installation at every floor level's shaft opening, maintained throughout the construction program, is the standard control measure.

Use the Scaffold Exchange vendor map to search by your project location and apply the Temporary Construction Stairs filter to identify vendors who supply, install, or rent temporary stair systems near you. Contact vendors directly through the platform to discuss your project's specific requirements — building type, number of floors, stair shaft geometry, permanent stair design, and construction schedule — and to determine which temporary stair system type best fits your program. For freestanding scaffold stair towers that provide external multi-story access independent of the building's stair shaft, see the Z-Stack Stair Towers page. For portable adjustable stair units serving individual access points, see the Adjustable Construction Stairs page.