Architecture Notes


New York City Infrastructure
October 31, 2009, 4:32 pm
Filed under: Infrastructure | Tags: ,

The Works: Anatomy of a City by Kate Ascher has been sitting on my coffee table for a while now.  I’ve noted these stats from Ascher’s concise descriptions about how New York City functions.  These are just a few points; the book includes a great deal of the history surrounding city infrastructure.

Streets

  • NYC streets have about 50 active red light ticketing cameras that send an electronic ticket to red light violators.  In addition to the 50, there are about 200 dummy cameras that don’t actually have the electronic ticketing technology.  Anybody know which ones are real?
  • Designer Karim Rashid designed a commemorative manhole cover for Con Edison in honor of the millennium.
  • Cobblestone is roughly 4 times as expensive as asphalt.  With this in mind, I’m not sure why we’re replacing the asphalt on Wall St with cobblestone.
  • Most parking meters run a little long to avoid challenge to their accuracy.  Coins from meters are collected once every 24 hours.
  • NYC residents can visit the parks department one stop tree shop to pay for a tree and its installation in their neighborhood.

Subway

  • 468 stations
  • 60 elevators
  • 161 escalators
  • 31,000 turnstiles
  • 9 abandoned stations, 5 seen from train rides
  • Retired subway cars are dumped in the Atlantic Ocean on artificial reef attracting large game fish.
  • The Subway consumes1.8 billion kilowatt hours of power each year.

Bridges

  • The George Washington Bridge acquires $1,000,000 in tolls each day.
  • Othmar Ammann is the Civil Engineer who designed the Verrazano, George Washington, Triborough, Whitestone and Throgs Neck bridges.

Mail

  • The city used to have an expensive pneumatic mail delivery system that sent letters in canisters through air propelled tubes. This writing explains the ridiculous culmination of this technology that led to its ultimate demise.

Water Tanks on Rooftops

  • Getting water to the tops of tall buildings at the turn of the century became difficult.  The solution was to fill rooftop water towers with pumps located in building’s basements.  10,000 – 15,000 of these are still in use in the city.  Although modern buildings rely on pumps, the rooftop water tower is still a reliable way to provide consistent water pressure.

Sewage

  • 6,600 miles of pipes.
  • NYC is one of 800 U.S. cities that rely on a combined sewer system –  a system that mixes storm water and wastewater.  Both go to the same treatment plant.  This is not a problem until it rains significantly.  When this excess flow occurs, the  overflow is diverted to one of 450 (CSO’s) Combined Sewage Overflows where the excess untreated sewage is dumped into the surrounding harbor water.  Overflow occurs about half the time it rains, dumping 40 billion gallons of untreated waste each year.

Garbage



Poll: Current BIM Use
October 21, 2009, 10:20 pm
Filed under: Digital Design, Uncategorized | Tags:

What is the level of Building Information Modeling integration on your current project?  BIM adoption has come a long way, but there are several levels of integration on any given project.  A project’s program, client, location, team, etc. affect the implementation of a potentially unfamiliar design and documentation process.  Even if you’re not using a BIM platform across the entire team, are you experiencing benefits from comparing what 3D data is available in a model comparison tool, such as Autodesk Navisworks?  Share your BIM implementation thoughts in the comments.



Stainless Steel
October 18, 2009, 4:04 pm
Filed under: Building Enclosure, Materials and Methods | Tags: ,

Here are few notes I reviewed recently regarding stainless steel.  Stainless steel is resistant to corrosion because it is a steel alloy with chromium.  The chromium present blocks corrosion from spreading.

Type 304 & 316

Type 304 and 316 are the most commonly used types of stainless steel for architectural applications.  These numbers are part of the SAE steel grading scale.  Type 304 is the basic alloy and appropriate for most interior and mildly corrosive environments.  Type 316 is more corrosion resistant due to the addition of molybdenum.  In situations requiring extensive exposure to salt and moisture an even more resistant type would be specified.  Check out the selection form within this publicaton by the IMOA to verify the type for a given application.

Finishes

The standard finishes 1 through 10 correspond to specific finishing techniques.  Here they are as listed on wikipedia:

No. 0: Hot rolled, annealed, thicker plates
No. 1: Hot rolled, annealed and passivated
No. 2D: Cold rolled, annealed, pickled and passivated
No. 2B: Same as above with additional pass-through highly polished rollers
No. 2BA: Bright annealed (BA or 2R) same as above then bright annealed under oxygen-free atmospheric conditions
No. 3: Coarse abrasive finish applied mechanically
No. 4: Brushed finish
No. 5: Satin finish
No. 6: Matte finish
No. 7: Reflective finish
No. 8: Mirror finish
No. 9: Bead blast finish
No. 10: heat colored finish-wide range of electropolished & heat colored surface



Book: Financial Management for Design Professionals
October 12, 2009, 9:56 pm
Filed under: Professional Practice | Tags: ,

Design publications and schools rarely mention financial management, but in the extraordinary business climate we have experienced, it certainly seems critical.  In an attempt to gain perspective on this important aspect of the profession, I recently read Financial Management for Design Professionals: The Path to Profitability by Steve Winter and Michael Tardiff.  The book  begins from square one; providing key information for architects who have little financial management experience.  This book provides a clear explanation of business challenges unique to design professions.  Here are some key points I took away from the read.

Dispel the myths

  • Do not boast “ignorance of financial matters as though it were a badge of honor.” This belief that finance should take a secondary role to one’s design principles “relegates legions of design professionals to a marginal professional status …; diminishes their social status and influence in comparison to peers in other professions; and condemns them to difficult, unsatisfying careers and a financially insecure retirement.” I think the key point here is that beyond personal achievement, a collectively increased financial literacy might also benefit the profession as a whole.
  • Financial information does not have to be confidential.  The authors explain the many benefits of creating a sense of ownership in a firm by sharing financial data with employees.

Essential Financial Concepts

  • Timekeeping. The authors explain why proper timekeeping is so critical.  Without proper timekeeping by every member of the firm, you cannot properly manage finances.
  • Financial Reports. These two key reports are critical in understanding the components of profitability.  The authors recommend reviewing these monthly.
    • Profit and Loss (P&L) Statement (or income statement)
    • Balance Sheet
  • Profitability. The relationship between three elements (revenue, expenses, and profit) is represented in the net operating revenue (NOR).  The following numbers are evaluated as percentages of the NOR: direct labor, indirect labor and profit.

Terminology

Here are just of few of the terms reviewed:

  • Accrual basis accounting. method of accounting in which revenue is recognized in the period in which work is performed. Expenses are recognized in the period in which they occur.  Used for profit and loss statement.  True profitability can only be measured on accrual basis.
  • Cash basis accounting. method of accounting in which income is recognized when payment is received and expenses when they are paid.  Income taxes are paid on cash basis.
  • Balance sheet. summarizes assets, liabilities and equities.
  • Direct expense. nonreimbursable expense that can be attributed to a project. Many firms to do not track these as accurately as they do reimbursable expenses.
  • Indirect expense. cannot be attributed or charged to a project.
  • Direct Labor. Labor that can be charged to a project.
  • Indrect Labor. Labor that cannot be charged to a project.
  • Overhead rate. ratio of total indirect expenses to total direct labor.  Needed to establish break-even and billing rates.

The Annual Budget

The annual budget is the benchmark against which you measure the firm’s financial performance.   It is the basis for the key planning tool- the P&L statement. They discuss the importance of past financial data in forecasting future budgets.  Plans for new firms,with limited past financial data are also discussed.  The annual budget consists of: revenue, labor costs, fixed expenses and variable expenses.

Profit Plan

The profit plan is a forecast for expected revenue.  The firm’s backlog of work and its past financial data will be critical in developing the profit plan.  The authors describe how to prepare the plan as well as how to assess the ability of the marketing plan to support it.

2 key factors in forecasting anticipated billings:

  • Utilization rate of employees
  • Billing rate of employees

Profit or loss:

  • (NOR) + (Other Income) – (Total Expenses) = Profit or Loss
  • (Profit or Loss) ÷ (NOR) = Anticipated Profit Margin (%)

The profit plan and annual budget are ways to express financial goals.  Accurate project fee budgets and profitable billing are the tools for achieving these goals.

7 key indicators

  • Utilization rate: total direct labor ÷ total labor = %
  • Overhead rate: total indirect expenses ÷ total direct labor = %
  • Break-even rate: overhead rate +1.0 = unit cost of salaries
  • Net multiplier: NOR ÷ total direct labor
  • Aged accounts receivable: (annual average accounts receivable ÷ (net operating revenue ÷ 365)
  • Profit to earnings ratio: profit before distributions and taxes ÷ NOR
  • Net revenue per employee: annual NOR ÷ number of employee

Billing Rates

  • In order to calculate true profit margin, it must be calculated as a percentage of NOR.  This is explained in detail.
  • Total break-even cost = (break-even rate for all project team members × anticipated hours) + outside consultant fees + project related expenses.

Fee budgets

  • Top-down method:  the fee may be fixed.  If not sufficient, the scope of services may be negotiable.
  • Bottom-up method:  Intended for private sector projects.  Usually begin with request for proposal (RFP).  Negotiations focus on project fee.