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2017 | OriginalPaper | Buchkapitel

3. How to Increase Occupants Safety with No Architectural Modifications: Defining Effective Wayfinding Systems

verfasst von : Gabriele Bernardini

Erschienen in: Fire Safety of Historical Buildings

Verlag: Springer International Publishing

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Abstract

Wayfinding is ones of the most significant issues during a fire evacuation in Historical Buildings, mainly because of possible building layout complexity, level of occupants’ familiarity with the architectural spaces, and potential environmental modifications due to fire effects. Proper wayfinding systems could be able to increase safety levels for occupants by reducing the egress time. Furthermore, these solutions are generally able to maintain a low impact on the building itself (and on its layout). However, according to a Behavioral design (BD) approach, they should be designed in order to effective provide the needed assistance to evacuees, by “interacting” with their behaviours. This chapter firstly offers an organization of existing wayfinding strategies, by mainly distinguishing active and passive systems (since they can bring or not “dynamic” directional information to the evacuees). The attention is focused on the interaction with human behaviors and the possibility to apply the systems (and related building components) to Building Heritage scenarios. Methodologies to evaluate the evacuation facilities effectiveness are outlined according to previous researches and BD studies recommendations.

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Fußnoten
1
For instance, compare with [20] categories.
 
2
In addition, some codes, as for NFPA 101, include the use of “NO EXIT” sign where “any door, passage, or stairway that is neither an exit nor a way of exit access and that is located or arranged so that it is likely to be mistaken for an exit.
 
3
Organism because it really has a life!
 
5
An “hot-spot” can be defined as a location within the architectural space or one of its building components, which is characterized by emerging problems, referring to the inquired issue, due to man-man and man-environment interferences. For instance, in case of fire risk and evacuation, congestions and bottlenecks points along paths and exits are the main “hot spot”.
 
6
Compare this criterion with e.g.: examples of compliance alternatives for fire suppression, smoke detectors and alarm systems given by NFPA 914, Annex E.
 
7
Otherwise, they are called “static signage system” [39].
 
8
Compare, e.g., with BS 5266-1, 7 and 8 definition, and requirements for emergency lightings.
 
9
Maintenance is needed for emergency lightings and not for signs.
 
10
This implies the necessity of certain recommended distances between two consecutive signs.
 
11
Depending on the producer’s declaration and in-situ verifies according to guidelines such as [15, 21].
 
12
Additional sources are: NFPA 101; ASTM E 2072-14 Standard Specification for Photoluminescent (Phosphorescent) Safety Markings; ANSI/UL 1994, Standard for Luminous Egress Path Marking Systems. Additional guidelines of producers can be retrieved here [42].
 
13
In case of fire or short circuit.
 
14
Nevertheless, recent works on individuals’ perception of evacuation signs seem to confirm a normal distribution of these values [25].
 
15
An exception is represented by floor proximity exit signs, that are placed near to the floor, as suggested by NFPA 101.
 
16
For Italian applications.
 
17
And also the “prescriptive” codes approach, which limit the impact man-fire interactions in evacuation.
 
18
Such as the one proposed by Siemens “Total Building Solution” https://​www.​youtube.​com/​watch?​v=​ycp6k5zDtF0. Accessed 28 Oct 2016.
 
19
Li Q, Plocher T (2010) Time-dependent classification and signaling of evacuation route safety. US Patent 7,683,793 B2; Mendelson E (2011) US 7,924,149 B2; Richter C, Sanso A, Rockett D, Nersu H (2008) System and method for dynamically and efficiently directing evacuation of a building during an emergency condition. US 7,579,945 B1.
 
20
Videotapes analyses allows to determine motion quantities and behavioral patterns but do not succeed in determining the effective instant of individuals choice and the related cognitive aspects [25].
 
21
As reported by [69], p. 1779.
 
22
Compare with M levels in PD 7974-6:2004.
 
23
The easiest way to simulate smoke is using eye-patch with different visible ray degree of transmissivity [30, 46]. In fact some smoke/fog machines use fluids which could leave a damaging residue on valuable historic building surfaces.
 
24
For group tests, they could be affected by social attachment phenomena and density phenomena.
 
25
These data are also essential for the development of simulations models and the definition of emergency time lines and management strategies for planners and rescuers.
 
26
Scott DW (2009) Sturges’ rule. Wiley Interdisciplinary Reviews: Computational Statistics 1:303–306. doi:10.​1002/​wics.​35.
 
27
While each class should include at least 3 values.
 
28
However, more than 3; a very low significance of results can be noticed in these conditions.
 
29
The risk index R is a classic combined KPI [88].
 
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Metadaten
Titel
How to Increase Occupants Safety with No Architectural Modifications: Defining Effective Wayfinding Systems
verfasst von
Gabriele Bernardini
Copyright-Jahr
2017
DOI
https://doi.org/10.1007/978-3-319-55744-1_3