Mono stringer stairs rely heavily on precise structural integration. They connect directly into beams, landing frames, columns, or wall supports.

Installing them during steel erection ensures:

1. Proper alignment with main steel structure
2. Correct height, pitch, and tread spacing
3. Accurate connection points before floors and finishes go in
4. Elimination of rework or cutting later

Waiting until framing, flooring, or plastering is done often causes clashes, delays, or expensive modifications.

Early installation guarantees the stair system fits exactly as engineered.

2. Helps With Safe and Efficient Access Between Levels

During construction, workers constantly need to move between floors. Before permanent stairs are installed, they often rely on:

1. Temporary scaffolding
2. Ladders
3. Mobile lifts

These options slow down productivity and increase safety risks.

By installing floating or mono stringer stairs early, fabricators create:

1. A safe access route for trades
2. Faster movement between floors
3. Reduced reliance on temporary access equipment
4. Better flow of people and materials

This is especially beneficial for multi‑storey projects.

3. Reduces Costs by Avoiding Late‑Stage Modifications

If stairs are installed late, clashes often occur with:

1. Framing
2. Services (HVAC, electrical, plumbing)
3. Wall linings
4. Flooring
5. Balustrades

Rectifying these issues can delay progress and add significant cost.

Installing stairs during the steel structure phase allows mechanical, electrical, and framing trades to work around the staircase instead of the other way around.

This prevents:

1. “Opening up” walls
2. Cutting finished floors
3. Adjusting beams or supports
4. Re-measuring or re‑fabricating stair components

Early installation = less risk, fewer changes, lower cost.

4. Mono Stringer Stairs Are Heavy — Installing Them Later Is Harder

Mono stringer and floating stairs are typically heavy, solid steel assemblies. Installing them later requires:

1. Larger cranes
2. Removal of temporary walls
3. Cutting access space
4. Additional labour
5. Disrupting finished work

During the steel erection stage, cranes and lifting gear are already onsite, making installation easy and cost‑effective.

This allows fabricators to:

1. Position stairs precisely using existing equipment
2. Weld or bolt directly to freshly exposed steel
3. Avoid manoeuvring through tight finished spaces

This greatly reduces installation time and complexity.

5. Better Welding Access and Structural Integration

Mono stringer stairs often require:

1. Full-penetration welds
2. Heavy-duty bolted connections
3. Gussets, plates, or stiffeners
4. Tie‑ins to beams and columns

Performing these tasks later is difficult because:

• Finishes block access
• Floor coverings can be damaged
• Walls may need to be opened
• Fire protection could be disturbed

Early installation allows unrestricted welding and bolting—ensuring the staircase is installed strongly and safely.

6. Helps Maintain Construction Schedule and Workflow

Every major trade depends on clear access routes.

Installing the stairs early supports:

1. Mechanical and electrical services
2. Carpentry
3. Gyprock / plaster
4. Flooring
5. Glazing
6. Painting

Workers can move freely without needing temporary access equipment.

This also prevents delays caused by waiting for stair installation later on, when multiple trades are competing for space.

7. Avoids Damage to Finished Surfaces

Stairs installed late can easily damage:

1. Freshly installed walls
2. Flooring
3. Ceilings
4. Newly painted surfaces

Early installation protects the project because:

1. Stairs are placed before finishes
2. Protective coatings or temporary coverings can be added
3. Trades can plan around the installed stair footprint

This prevents expensive repairs and rework.