Practice Management Member Conversations

We have had a recent disussion concerning the representation of items shown on Demolition drawings in a set of construction documents. The following are the two ideas as to how they are to be communicated:
    1) The wall or item is to be shown as a dashed or dotted line.
    2) The wall or item is to be shown with a hashed poche over the item.
Does anyone know if one or the other is a standard of the profession?

-------------------------------------------
George H. Hohmann, AIA
Principal
ACAI Associates, Inc.
Fort Lauderdale FL
-------------------------------------------

My experience from hand drafting through BIM is typically the dashed line is used for items, and the dashed hatch is  used for areas. For example renovation of a bathroom, you could hatch the entire area to indicate all flooring, walls, fixtures, and associated items. Do not discount the added QC of Notes, both General and Itemized, to insure the demolition is clear expecially anything to be salvaged or replaced.
Kristine Young AIA
Tarpon Springs FL
-------------------------------------------

I regularly see mechanical consultants using the hatch over items--ducts, equipment, etc--to be removed, but I've never seen an architect's standards use anything but a dashed line to represent items to be removed. Demolition keyed notes are good for clarifying too.

-------------------------------------------
David Clarke AIA, Senior Architect
Williams Design Group, Inc., Las Cruces NM
President-Elect AIA New Mexico Southern Chapter

Original Message:
Sent: 07-20-2011 19:05
From: Kristine Young
Subject: Quality Control/Drawing Standards

My experience from hand drafting through BIM is typically the dashed line is used for items, and the dashed hatch is  used for areas. For example renovation of a bathroom, you could hatch the entire area to indicate all flooring, walls, fixtures, and associated items. Do not discount the added QC of Notes, both General and Itemized, to insure the demolition is clear expecially anything to be salvaged or replaced.
Kristine Young AIA
Tarpon Springs FL
-------------------------------------------

The best source for information on drawings standards is to the US National CAD Staandard (NCS), a product of the National Institute of Building Sciences, AIA, and CSI. Version 5 has recently been published. Rick Green and I wrote a book entitled "The Architect's Guide to the US National CAD Standard" which explains the standard and how to implement it in your office.

The drafting conventions for walls to be removed is to indicate these objects using using medium (0.35 mm) dashed lines. Hope this helps.

-------------------------------------------
Dennis Hall FAIA
Hall Architects, Inc.
Charlotte NC
-------------------------------------------

The National CAD Standards (NCS), as issued by the National Institute of Building Sciences, establishes a whole range of standards.  This includes line types as well as drawing set organization, sheet organization, symbols and other drafting conventions.  The NCS has had input from AIA, CSI, GSA and other allied organizations.  It is our first go-to manual for all issues related to producing construction documents.  Their web site is:  http://www.nationalcadstandard.org/ncs5/

-------------------------------------------
Carl Hole, AIA
Principal/Architecture Studio Leader
RNL
Denver CO
-------------------------------------------

Where  demolition scope  is complicated or messy in terms  of what stays and what goes, don't be shy about using photos in your documents with appropriate notes identifying the scope of the demolition.  A picture  is worth.....?

-------------------------------------------
Eugene Ely AIA
HMC Architects
San Jose CA
-------------------------------------------