Seismic Calculator

Important Notes:
As a manufacturer and supplier of Fire Alarm Systems, Pertronic Industries has no specific expertise in Structural or Seismic Engineering, but provides this calculator as a guide only.
- consult a registered Seismic engineer to confirm these calculations.

This calculator should be used for Building Importance Levels (BIL) 1-3 only : refer to the Component Risk Factor table for details.
- for BIL = 4, consult a registered Seismic engineer or the project's structural engineers to obtain the Lateral Force Co-efficient (C)

This calculation has no legal standing and must be peer reviewed before submission to a BCA in support of a PS1 (or other) Producer Statement.

These calculations are for a wall-mounted Pertronic Fire Alarm Panel. According to NZ4219 4.1, components attached to only one level of supporting structure and subject to only inertial forces, may be designed in accordance with Section 4.2.1 : Static Forces.
Fixings shall comply with Section 3.10
4.2.1 Static forces shall be determined in accordance with AS/NZS1170.0 and NZS1170.5 or NZS4519:2009 Section 3.4.
- Pertronic Industries uses NZS4519:2009 Section 3.4 for guidance.

Important Notes:
As a manufacturer and supplier of Fire Alarm Systems, Pertronic Industries has no specific expertise in Structural or Seismic Engineering, but provides this calculator as a guide only.

Consult a registered Seismic engineer or the project's structural engineers to determine the number, location and grade of fixings to be used.

Select your region: North Island: North North Island: Central North Island: South South Island: North South Island: Central South Island: South

Then select your location: Kaitaia Paihia/Russell Kaikohe Whangarei Dargaville Warkworth Auckland Manakau City Waiuku Pukekohe Thames Paeroa Waihi Huntly Ngaruawahia Matamata Morrinsville Te Aroha Tauranga Mount Maunganui Hamilton Cambridge Te Awamutu Te Puke Putaruru Tokoroa Otorohanga Te Kuiti Mangakino

Then select your location: Rotorua Kawerau Whakatane Opotiki Ruatoria Murupara Taupo Taumarunui Turangi Gisborne Wairoa Waitara New Plymouth Inglewood Stratford Opunake Hawera Patea Napier Hastings Whanganui Waipawa Waipukurau

Then select your location: Raetihi Ohakune Waiouru Taihape Marton Bulls Feilding Palmerston North Dannevirke Woodville Pahiatua Foxton/Foxton Beach Levin Otaki Waikanae Paraparaumu Masterton Porirua Wellington CBD: north of basin reserve Wellington Hutt Valley: south of Taita Gorge Upper Hutt Eastbourne - Point Howard Wainuiomata

Then select your location: Takaka Motueka Nelson Picton Blenheim St Amaud Springs Junction Hanmer Springs Seddon Ward Cheviot Kaikoura

Then select your location: Westport Reefton Murchison Greymouth Harihari Hokitika Fox Glacier Franz Josef Otira Arthurs Pass Rangiora Darfield Akoroa Christchurch Geraldine Ashburton Fairlie Temuka Timaru Waimate

Then select your location: Mt Cook Twizel Cromwell Wanaka Arrowtown Alexandra Queenstown Milford Sound Palmerston Oamaru Dunedin Mosgiel Riverton Te Anau Gore Winton Balclutha Mataura Bluff Invercargill Oban

Panel Product Code:

Zone Factor Z:

Panel weight kg: Note: the weight MUST include batteries

Number of fixing points:

Building Importance Level: 1 2 3 4

Component Position Ch: At or below ground, 1 Above ground, 3 1=At or below ground; 3=Above ground

Performance Factor Cp: Use category: P5, as determined by NZS4512:2021 S 4.2.22.1

Risk Factor Rc: 0.25 0.5 0.9 1 1.3 1.6 1.8

Calculate Earthquake Load Demand and force on each fixing
Lateral Force Coefficient C	= 2.7 x Ch x Z x Cp x Rc
	= 2.7 x 1 x 0 x 0.85 x 1
	= 0.000
Earthquake Load Demand F	= C x W x 9.81Nkg-1
	= 0.000 x 0 x 0.00981
	= 0.000 kN
Force on each Fixing Support Ff	= F/Fn
	= 0.000 / 2
	= 0.000 kN

Determine Fixings
The Tension and Shear force on each fixing point must be below the Earthquake Load Demand calculated above.
- for fixing to a timber frame, Table 8 may be used to identify suitable screws with Tension and Shear force which exceeds the required minimum Earthquake Load Demand.
- for fixing to non-timber frames, the installer must identify suitable fasteners by accessing the fastener suppliers Mechanical Anchoring Specifiers Resource Book (ASRB), or similar.
- an example of this is Table 9, the ASRB for the Ramset DynaBolt Plus Sleeve Anchors - Non-Cracked Concrete is available from: https://ramset.co.nz/Document/Resources/361/Search

Enter Calculated Fixing Gauge:

Table 8: Woodscrew Design Strengths:
- insert Table 8, preferably allowing minimum Earthquake Load Demand to identify the most suitable row.

Gauge	Diameter (mm)	Minimum penetration (mm)	Tension (kn)	Shear (kn)	Minimum edge distant (mm)	Minimum end distant and spacing (mm)
8	4.17	30	1.1	1.1	20	45
9	4.52	32	1.28	1.25	23	45
10	4.88	35	1.51	1.45	25	50
12	5.59	40	1.98	1.87	28	55
14	6.3	45	2.5	2.33	32	65

Table 9: Non Timber Design Strengths:
- illustrated is an example ASRB for the Ramset DynaBolt Plus Sleeve Anchors - Non-Cracked Concrete.
- access the ASRB for the fixings to be used with the panel being installed and select a fixing with Tension and Shear forces which exceed the required minimum Earthquake Load Demand.