---
type: "Bill"
title: "Concerning the use of cross-laminated timber for building construction. (REVISED FOR ENGROSSED: Concerning the use of mass timber for building construction. )"
description: "Concerning the use of cross-laminated timber for building construction. (REVISED FOR ENGROSSED: Concerning the use of mass timber for building construction. )"
jurisdiction: "us/states/wa"
legislature: "Washington Legislature"
session: "2017-2018"
identifier: "SB 5450"
citation: "Washington SB 5450 (2017-2018)"
classification: ["bill"]
subjects: []
status: "enacted"
primary_sponsors: ["Liias"]
version_count: 2
action_count: 23
vote_count: 2
first_action: "2017-01-25"
last_action: "2018-03-09"
source: "openstates"
source_identifier: "ocd-bill/8d77ad61-9e63-40b8-8923-9dcfb0049991"
source_url: "http://apps.leg.wa.gov/billinfo/summary.aspx?bill=5450&year=2017"
source_hash: "c09fe7fc4077c803e423178d7333a2d56062a5da5327d88344ee3da693d901cd"
vintage: "2026-07-01"
source_snapshot: "https://data.openstates.org/daily/2026-07-01/public.pgdump"
retrieved_at: "2026-07-06"
confidence: "reported"
tags: ["legislation", "bill", "us-wa"]
---

# Washington SB 5450 (2017-2018) — Concerning the use of cross-laminated timber for building construction. (REVISED FOR ENGROSSED: Concerning the use of mass timber for building construction. )

## Version chain

The bill's text revisions, in order — the diff chain from filing to enrollment.

1. **Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2017-18/Htm/Bills/Senate%20Bills/5450.htm)
2. **Engrossed Bill** (committee substitute) — [source](http://lawfilesext.leg.wa.gov/Biennium/2017-18/Htm/Bills/Senate%20Bills/5450.E.htm)

## Votes

- Final Passage (#4) — **91–6** (pass) · lower
- 3rd Reading & Final Passage (#6) — **45–2** (pass) · upper

## Sponsors

- Liias — primary (person)
- Chase — cosponsor (person)
- Fain — cosponsor (person)
- Frockt — cosponsor (person)
- McCoy — cosponsor (person)
- Miloscia — cosponsor (person)
- Mullet — cosponsor (person)
- Ranker — cosponsor (person)
- Warnick — cosponsor (person)
- Wilson — cosponsor (person)
- Zeiger — cosponsor (person)

## Timeline

The legislative action history — every referral, reading, and vote.

- **2017-01-25** First reading, referred to Local Government. `reading-1`
- **2017-04-24** By resolution, reintroduced and retained in present status.
- **2017-05-23** By resolution, reintroduced and retained in present status.
- **2017-06-21** By resolution, reintroduced and retained in present status.
- **2018-01-08** By resolution, reintroduced and retained in present status.
- **2018-01-30** LGOV - Majority; do pass.
- **2018-01-31** Passed to Rules Committee for second reading.
- **2018-02-06** Placed on second reading by Rules Committee.
- **2018-02-12** Floor amendment(s) adopted.
- **2018-02-12** Rules suspended. Placed on Third Reading.
- **2018-02-12** Third reading, passed; yeas, 45; nays, 2; absent, 0; excused, 2. `reading-3`
- **2018-02-14** First reading, referred to Local Government (Not Officially read and referred until adoption of Introduction report). `reading-1`
- **2018-02-22** LG - Majority; do pass.
- **2018-02-23** Referred to Rules 2 Review.
- **2018-02-26** Rules Committee relieved of further consideration. Placed on second reading.
- **2018-02-27** Rules suspended. Placed on Third Reading.
- **2018-02-27** Third reading, passed; yeas, 91; nays, 6; absent, 0; excused, 1. `reading-3`
- **2018-03-01** President signed. `passage`
- **2018-03-03** Speaker signed. `passage`
- **2018-03-05** Delivered to Governor.
- **2018-03-09** Governor signed. `executive-signature`
- **2018-03-09** Chapter 29, 2018 Laws. `became-law`
- **2018-03-09** Effective date 6/7/2018. `became-law`

## Source

OpenStates / OpenCivicData bulk snapshot [2026-07-01](https://data.openstates.org/daily/2026-07-01/public.pgdump); origin `ocd-bill/8d77ad61-9e63-40b8-8923-9dcfb0049991`. Confidence: reported (aggregated from official Washington legislature records).