Concrete project planning
Concrete openings for a planned building-riser renewal
- Concrete scope
- Trade coordination
Replacing a riser does not necessarily mean drilling a new hole on every floor. The mechanical designer may propose using an existing route, enlarging selected openings or moving part of the stack. The concrete package follows that route decision and the actual construction at each level.
CoreCut's core-drilling service assesses the specified openings. Pipe isolation, removal, replacement, testing and sealing are separate responsibilities. The project team determines the building's service arrangements during the renewal.
Draw the vertical route, not just repeated circles
A floor plan identifies a location; a building section helps explain how that location connects to the level above and below. Mark retained openings, proposed changes and offsets together. Include access to both faces of the concrete and the rooms through which the work is reached.
Do not assume that one floor represents the whole stack. Previous alterations, finishes or different structural conditions may change the assessment. Keep unverified floors visible as questions rather than copying a confirmed opening specification into them.
Three levels can require three different decisions
| Illustrative level | Proposed route | Concrete decision |
|---|---|---|
| Lower level | Retain an existing opening | Confirm whether any concrete work is needed |
| Middle level | Alter the opening to suit a revised detail | Obtain the reviewed removal boundary; do not assume enlargement is feasible |
| Upper level | Introduce an offset and a new penetration | Confirm location, assembly review and access on both sides |
Scroll across the table to see all columns.
This is a section through a hypothetical project, not a prescription for a real building. An offset can change more than drilling: the designer must reconcile the installation and the receiving sealing detail as well.
Keep the opening and its closure together
Each accepted opening needs a purpose, dimensions and a responsible trade. Our opening schedule provides the location record; the penetration-interface guide addresses who specifies sleeves and closure.
The riser-renewal plan adds the relationship between those individual entries. A finished hole at one floor is not a complete working riser, and a pipe installed through it is not evidence that all required sealing and checks are complete.
Release work areas in a usable sequence
Building management and the GC should resolve access to the rooms above and below before arranging attendance. Identify who makes each system available and who accepts it back. A convenient access date is not confirmation that a connected service can be disturbed.
If only part of the stack is ready, distinguish confirmed openings from later areas. CoreCut can assess the defined portion without assuming simultaneous access throughout a tower or uninterrupted service to occupants.
Request a coring assessment with the proposed section, floor references, design contact and access constraints. State which openings are reused, changed or new so the enquiry describes the actual renewal rather than a blanket hole count.
Where the stack renewal intersects a commercial washroom layout change, compare the individual room package with the shared vertical route before issuing separate instructions.