CP90-1 Under Technical Review Engine v0.9.1

CP 90 Partition Wall Checks calculator

Preliminary checks to SS CP 90: 2001 (2014): the H × M floor-loading condition, Table 4 grade criteria against SS 492 test results, Annex D suggested sound insulation, and installation tolerances.

Preliminary checks only. This calculator provides preliminary checks and reference information based on CP 90: 2001 (2014). It does not replace the complete design, site verification, structural assessment, applicable authority requirements, or review by a qualified professional. A result marked "Pass" applies only to the specific check shown.

Available after technical review

This calculator will open once its clause references and values have been checked against the CP 90 source and reviewed. The method, inputs and references are listed below.

Inputs

Project or calculation title (optional)
Partition location / room use
Partition construction type
Finished partition height, H (m)
Finished partition mass per area, M (kg/m²)
Partition grade (CP 90 Table 2 / Table 4)
Partition is on a platform floor
Partition positions and loads included in the structural design
Supporting floor / beam capacity has been checked
Manufacturer's assembled partition weight available
Test evidence (SS 492) available for this wall system
Test specimen design height matches the project height
Test fixing method matches the project fixing method
Test report reference
Tested wall build-up
Tested specimen height (m)
Tested fixing details
Test date
Test result: Stiffness - maximum deflection (SS 492 method A) - measured value (mm)
Test result: Stiffness - maximum residual deformation (SS 492 method A) - measured value (mm)
Test result: Small hard body impact - surface damage (SS 492 method B) - energy passed (N·m)
Test result: Small hard body impact - perforation (SS 492 method D) - energy passed (N·m)
Test result: Large soft body impact - damage (SS 492 method C) - energy passed (N·m)
Test result: Large soft body impact - structural damage (SS 492 method E) - energy passed (N·m)
Test result: Door slam (SS 492 method F) - cycles passed (No.)
Room use for suggested sound insulation (Annex D, Table 6)
Measured finished-surface deviation (horizontal, ~600 mm above floor) (mm)
Measured vertical deviation at the measuring points (mm)
Measured deviation in thickness between partition faces (mm)
Measured gap under a 1.2 m straight edge (local undulation) (mm)

Worked sample

Inputs: H = 3.0 m, M = 35 kg/m², grade MD, private office, not a platform floor; load inclusion and supporting capacity unknown; no test report; no measured deviations.

H × M = 3.0 m × 35 kg/m² = 105 kg/m ≤ 306 kg/m

Empirical floor-loading product: within the CP 90 stated limit.
Structural capacity: not assessed - inclusion and capacity unknown; structural review flagged.
Robustness: MD reference criteria only; no wall pass/fail without test evidence.
Acoustics: private office suggested minimum Rw = 44 dB.
Installation tolerances: not assessed - no measured deviations entered.
Overall: preliminary checks completed - structural and performance evidence review remains necessary.

Illustrative only: this does not approve a 3 m, 35 kg/m² partition for installation without checking the actual supporting structure and project conditions.

Load these inputs

CP 90 Table 4 (all grades)

Requirement (SS 492 method)	Unit	LD	MD	HD	SD	Principal criterion
Stiffness - maximum deflection (A)	mm	25	20	15	10	Maximum deflection
Stiffness - maximum residual deformation (A)	mm	5	3	2	1	Maximum residual deformation
Small hard body impact - surface damage (B)	N·m	3	3	6	10	Judgement of indent
Small hard body impact - perforation (D)	N·m	No requirement	5	15	30	No perforation of facing
Large soft body impact - damage (C)	N·m	20	20	40	100	2 mm maximum deformation
Large soft body impact - structural damage (E)	N·m	60	60	120	120	No collapse or dislocation
Door slam (F)	No.	20	20	100	100	No damage and 1 mm maximum displacement

Performance criteria for a grade, not proof that a particular wall passes. All levels for a grade must be satisfied (Annex B).

Surface measurement (cl. 3.7.1, Fig. 6)

Horizontal measurements about 600 mm above finished floor level.
Corresponding vertical measurements at the measuring points.
Laser, optical instrument or straight edge.
4 mm band relative to the line joining the end points (horizontal) or the vertical (vertical); excludes projections such as skirtings and expressed joints.